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Posted by dweekly 10/14/2025

Don’t Look Up: Sensitive internal links in the clear on GEO satellites [pdf](satcom.sysnet.ucsd.edu)
555 points | 138 comments
vayup 10/14/2025|
Some of the stuff that was extracted from the unencrypted traffic in the link:

- T-Mobile backhaul: Users' SMS, voice call contents and internet traffic content in plain text.

- AT&T Mexico cellular backhaul: Raw user internet traffic

- TelMex VOIP on satellite backhaul: Plaintext voice calls

- U.S. military: SIP traffic exposing ship names

- Mexico government and military: Unencrypted intra-government traffic

- Walmart Mexico: Unencrypted corporate emails, plaintext credentials to inventory management systems, inventory records transferred and updated using FTP

This is insane!

While it is important to work on futuristic threats such as Quantum cryptanalysis, backdoors in standardized cryptographic protocols, etc. - the unfortunate reality is that the vast majority of real-world attacks happen because basic protection is not enabled. Good reminder not take our eyes off the basics.

alfiedotwtf 10/14/2025||
> This is insane!

Not as insane as it was in the early 2000s…

> while link-layer encryption has been standard practice in satellite TV for decades

Before Snowden, I would say 99% of ALL TCP traffic I saw on satellites was in unadulterated plain-text. Web and email mostly.

… the pipe was so fast, you could only pcap if you had a SCSI hard drive!

petercooper 10/14/2025|||
I was exposed to some of this as a teenager due to a (now dead) family member being heavily into telecoms. You could receive and process POCSAG (the protocol used by paging systems) to pretty much read the entire stream of unencrypted, plain text pager messages going out over the wire. You could also reprogram a generic pager to receive pages for whatever number you liked. You could also transmit your own POCSAG and send any number a page (only within your transmission range).

SMS was also a bit like this in its early days and you could read them coming off the local cell (also true of calls at a certain time, but I didn't see much of this).

I just did a quick search and apparently many pagers in the UK are still running cleartext POCSAG! https://www.reddit.com/r/RTLSDR/comments/1asnchu/are_uk_page...

tmjwid 10/14/2025|||
Yeah POCSAG is not encrypted here in the UK. You can still see all the emergency information from around the country unencrypted in realtime. They even broadcast the details of the emergency and a lot of times it's not nice. You do/did get some bird watching sightings though!
mattsparkes 10/16/2025||
Very curious to hear more about this. How is it done, and what's the legal status of doing it?
sidewndr46 10/14/2025|||
This is still the case today in the US, plenty of pager systems run POCSAG or near equivalents. There is no conditional access or encryption of any kind. Receiving such signals is notionally criminal, but I'm unaware of any prosecutions for such a thing.
T3OU-736 10/14/2025||||
```… the pipe was so fast, you could only pcap if you had a SCSI hard drive!```

This is why NSA asked for (and got from SGI) a guranteed rate I/O API - to make sure that whstever the signal intelkigence platform sensors captured could be written to storage.

feraloink 10/14/2025|||
In https://satcom.sysnet.ucsd.edu/ Has The Issue Been Fixed section:

>we re-scanned with their permission and were able to verify a remedy had been deployed: T-Mobile, WalMart, and KPU.

The fact that critical infrastructure (e.g. utility companies using satellite links for remote-operated SCADA) was exposed is really scary too.

colechristensen 10/14/2025||
>The fact that critical infrastructure (e.g. utility companies using satellite links for remote-operated SCADA) was exposed is really scary too.

Really serious security risks in critical/industrial infrastructure are ... numerous. And these aren't complex vulnerabilities, these are leaving the door open with default passwords, unencrypted traffic, and that sort of thing.

jabiko 10/14/2025|||
When driving by Bad Aibling I always wondered why the BND (intelligence agency) invests so heavily in satellite communication eavesdropping. I naively assumed that this kind of communication would be encrypted.

Also a fun fact: For a long time it was only semi-officially known that the BND owned and operated the site. Officially it was called "Long distance telecommunications station of the Bundeswehr" and operated by the "Federal Office for Telecommunications Statistics"

MagnumOpus 10/14/2025||
At least since the mid-1990s Echelon revelations in the EU parliament anybody who cares knows that Bad Aibling (and similar stations all across Europe like Bude/Morwenstow in the UK) had been operated by the NSA in collaboration with US Army intelligence (if the official name of “18th United States Army Security Agency Field Station” didn’t clue you in.

Officially it has been transferred to the BND; experience suggests all data from there still goes straight back to Fort Meade… (And in exchange the BND gets some morsels back on people _they_ are not allowed to spy on publicly.)

unit149 10/14/2025||
[dead]
RajT88 10/14/2025|||
I'm waiting for IT departments worldwide to wake up to the threat that your browsers are leaking all of your URI's by default back to the manufacturers.

URI's leak company secrets. I'm sure there's some people at Google using Edge which are leaking company data to Microsoft. I'm sure there's some people at Microsoft using Chrome which are leaking data to Google.

Edge and Chrome both send back every URI you visit to "improve search results" or to "sync history across devices". It's not clear if this includes private mode traffic or not (they don't say).

Huge privacy hole to allow this, and nobody seems to be aware or care.

fmobus 10/14/2025|||
For that to be in anyway useful for those companies (as a means to spy on their competitors), they'd have to be actively looking into the information to derive intelligence. Not really practical without some serious engineering, which would leave tons of evidence. It's not worth it. That's just not how these companies operate.

> there's some people at Google using Edge

I'd be surprised if it's more than a handful of people with explicit exceptions for work-related tasks. Chrome is the norm.

RajT88 10/15/2025|||
> For that to be in anyway useful for those companies (as a means to spy on their competitors), they'd have to be actively looking into the information to derive intelligence. Not really practical without some serious engineering, which would leave tons of evidence. It's not worth it. That's just not how these companies operate.

Was thinking about this as well. What evidence would it realistically leave? I mean - they are sending the uri's by default so no client side reverse engineering is needed. They say plainly they are doing this.

Yes, it's a lot of traffic.

IP spaces are well known. Easy to filter for corporate traffic. From there, it's a smorgasbord of internal URI's to dig through - anything with no domain name, or host.(companyname).com traffic. Also easy.

Maybe this ends up in a big data lake queryable by certain groups, but not anyone likely to spill the beans. NDA covers you there. This is not New York Times level corporate subterfuge. It's almost certainly not legal - and this is the important thing - the regulators haven't had the gumption to prosecute anti-competitive behavior in earnest since the 70's or earlier. What Microsoft went through in the 90's in retrospect was antitrust litigation with kid gloves on.

This armchair analyst sees no downside to such practices. Risk, but so little it doesn't matter.

Sure, insiders could spill the beans and violate their NDA's, but who the fuck is going to do more than levy a slap on the wrist for something too difficult to explain to Congress in a way that gets them to care?

Now, I think if you actually put your hands on the browsing history of congressmen harvested in this way, and put it into the public domain, you're going to get a bunch of regulators to all of a sudden care about antitrust enforcement again.

fmobus 10/15/2025||
You're putting too much faith in NDAs. All it takes is one disgruntled employee with a sense of ethics.

Also, evidence doesn't have to be externally visible. In a lawsuit discovery will dig through design docs, server logs, emails, chats, everything.

estimator7292 10/15/2025||||
That's what we have AI for. This type of thing is no longer a manual or manually-automated process.
fmobus 10/18/2025||
Sure, but that still takes engineering. Extracting information and intelligence out of the data is not just throwing AI into a pile of data, it's real engineering that will always required months of design, experiments, computing and storage capacity planning, releases, maintenance, operations, etc.

That leaves a huge internal paper trail - the kind of thing that shows up during discovery in a lawsuit.

No, companies like that are not doing this kind of shit, it's not worth it.

RajT88 10/15/2025|||
I mean, realistically, yes. But you'd be surprised sometimes pretty technical folks who just use whatever is installed when their work machine for whatever reason runs Windows.
fmobus 10/21/2025||
Luckily, the fleet is tightly managed and you <i>can't<i> install just anything.
pengaru 10/14/2025|||
Wait til you hear about how many companies willfully perform all their work in g-suite and office 365/teams
RajT88 10/14/2025||
Indeed. And they are trying to find sneaky ways to get you to back up more and more data there.

They do have privacy policies which say they won't sell that data, or use it for advertising or anything other than delivering the service. But - who knows if that is true? There's no oversight. And if they get caught breaking that privacy policy, who has the appetite these days to do anything meaningful in terms penalties? Nobody.

nakedper 10/14/2025|||
WHEN they get caught and the fine never outweighs the sale price of the data. It's not a coincidence. It's a clear factory in the cost of doing that into business. There's no Moreland ethical backbone here.
shadowgovt 10/14/2025|||
I believe the point of the above comment is "The trust model already trusts the recipient, so nobody cares that the recipient is seeing query params because they trust the recipient to ignore them."

> who knows if that is true? There's no oversight

The oversight is that those companies rely heavily on being trustworthy, and proving untrustworthy would be disastrous for their business models. Companies don't have to care right now because they have reason to believe Google, MS, et. al. aren't sniffing that data. If they came to believe they were?

Google alone is making $43 billion on Cloud and would prefer not to jeopardize that revenue stream.

abdullahkhalids 10/14/2025|||
Facebook for example has been shown in multiple public scandals and lawsuits to be untrustworthy. It is still among the largest social media platforms, and many businesses, for example, reveal large chunks of their marketing strategies to Facebook through its advertising tools.

The reason why this does not result in a significant loss of usage is because trustworthiness-usage is not a linear function or a even a continuous function -- it is a step function. To cause less usage, the loss-of-trust force has to be higher than the networking effect force. Otherwise, behavior does not change.

RajT88 10/14/2025|||
> If they came to believe they were?

That's what I don't get - security and compliance people are paranoid.

This is the kind of thing they shouldn't be requiring evidence to care about, given the rest of their job is about the "what-ifs". Just seems crazy to me.

zelos 10/14/2025|||
> Real-time military object telemetry with precise geolocation, identifiers, and live telemetry

Oops

NoiseBert69 10/14/2025||
Pulls out the bamboo whip

Another round of OpSec training

atoav 10/14/2025||
Why? I thought we are now clear on OpSec?
misswaterfairy 10/14/2025|||
Perhaps not in the clear for OpSec purposes...
1oooqooq 10/14/2025|||
that message was about the inner circle of the regime, to discuss the plans to sabotage opsec elsewhere.

anyway, but even that had a joke of opsec.

rurban 10/17/2025|||
Did you check how hospitals or governments treat sensitive patient data? They are transported in clear (no TLS) over the net from the hospital or ensurers databases to the practitioners. Not on 80, but still just plain DICOM XML. With full names and all the sensitive data. That's a bit more insane IMHO.

The new German ecard patient system is also trivial to hack, as shown multiple times on CCC. As long as no one goes to jail, they will continue like this.

CGMthrowaway 10/14/2025||
Is there a git repo that lets one read this stuff in real time yet?
dylan604 10/14/2025||
As with anything in life, when it's what you know and do on the regular, that simple thing can look like magic to others. I met an old timer in the satellite business that came out to help install our receiver for a new TV channel the company I was at was getting off the ground. He found out what bird we were using and what its slot was. Based on that, he knew how many satellites over from the satellite he knew and used as his base. It was a long time running TV channel that he could find very quickly. Once that bird was located, he just manually (literally pushed the dish with his hand) counting the number of satellites that came in/out of view until he landed on "our" bird. Once there, connected our receiver and baddaboom baddabing, there it was. Once the satellite was pointed at the proper angle to the south, it took less than five minutes from him connecting his receiver to verify his base signal to packing up and heading off the roof.

His base satellite signal was unencrypted and a main reason he used it for this purpose. Our channel was scrambled, and only verifiable after our receiver with the decoder was connected. It was impressive seeing someone that good at their job make it look so easy, but after he explained the layman's version of orbital slots it became less magical. This is why magicians are meant to not tell you how the trick is done.

stavros 10/14/2025||
Eh I kind of feel like you can't say that. If something is magical before you learn how it's done, it should be magical after. The magical part isn't "it's actually impossible", but "it's so far from what I could come up on my own", which still holds after you know the secret.
lxgr 10/14/2025||
Yes, some excellent magic tricks work even better when you know how they work, especially if they’re the kind that’s based on putting in ridiculous amounts of work or skill/practice.

Penn and Teller play a lot with that idea, for example.

SAI_Peregrinus 10/15/2025|||
Dani DaOrtiz is one of the best at that. He sells instructions for all his tricks, but he's so good at performing them that they still feel like magic even if you know what he's doing. His appearance on Fool Us¹ is a series of excellent examples of that. He palms a card onto the box, and Teller's reaction when he misses it happening is astonishment because it's such a simple move to spot but done so well Teller missed it despite looking for such moves. That continues as the act goes on, until both Penn & Teller are left experiencing only the joy of the performance & awe at Dani's skill. None of the techniques are ones they don't know about, but Dani does them so well they didn't even try to figure out everything he did, since they knew they'd have to guess what he'd actually done! Penn later described Dani as "the best card magician who has ever lived"².

The best magic tricks tend to be the ones where knowing the secret doesn't ruin the trick, but instead changes it to a show about the skill of the performer. Nobody complains about "spoilers" at a virtuoso's concert, the joy of the performance & the skill of the performer are not ruined by knowing the music beforehand. I think the same can apply to magic, to books, to movies, etc. You can re-read a really good book, or re-watch a really good movie, and the experience won't be ruined by knowing the ending. It'll be different, but not worse. With magic the awe shifts from "how is that possible?" to "how did that person manage to put in the effort to do that so well‽".

¹https://www.youtube.com/watch?v=5_KcQt0z-eE

²https://www.youtube.com/watch?v=NdxT3BL_Iik

dylan604 10/16/2025||
I went to a local show of a magician doing the levitating woman where he'd pass the rings across the length of her body to show no strings attached. however, his showmanship was so bad that his assistant was struggling to keep the trick going. when I saw her wince, the secret became very obvious. there she was being very acrobatic suspending her body vertically with just the strength of her one arm, but he took so damn long that she grew tired and her arm strength gave way. she recovered very quickly, but just not quick enough to keep the secret. I felt bad for her as he would more than likely blame her rather than admitting his own bad showmanship and not realizing her effort. It was at that point that I realized just how important the "assistant" really was.
abustamam 10/15/2025||||
I think I respect Penn and Teller as magicians more since they reveal how some of their tricks work, and yeah the sheer amount of skill required is for some of their tricks is impressive.

I also liked watching The Masked Magician share some behind the scenes of tricks, and even knowing how it's done doesn't make the trick any less impressive.

ASalazarMX 10/15/2025||
They warn you that they're going to misdirect you, and you know it, and still fall for it. Somehow they keep the magic alive.
padjo 10/14/2025|||
You should hide the secret if it’s ugly, but you can expose if it’s beautiful (and it’s your trick!)
rglover 10/14/2025||
This story gave me an odd burst of hope, thank you.
protocolture 10/14/2025||
Had a vendor offer a customer of mine a huge discount if they purchased radios without the encryption license in the year of our lord 2024.

Not even WPA or WEP. Just clear across the sky. And this is terrestrial.

My bet is that in space there would be a noticable increase in heat/energy if they did encryption by default. But its still incredible to see them pretend like space is impossible to get to, ultimate obscurity.

tgsovlerkhgsel 10/14/2025||
> My bet is that in space there would be a noticable increase in heat/energy if they did encryption by default.

Why would it? The data originates from earth, and should be encrypted during the uplink leg too, so the crypto should all happen in the ground segment (or even well before it reached anything that could be considered part of the satellite setup, honestly).

anilakar 10/14/2025|||
Satellites have long lifespans and have to outlast current crypto algorithms. Ideally they're nothing more than radio repeaters that rebroadcast the uplink signal.
polski-g 10/14/2025|||
Correct. That is what almost all geostationary satellites are. If you want encryption, do it at the application layer.
lxgr 10/14/2025||||
Really depends on what the satellite does, and even for purely "dumb pipe" satellites you'll need some telemetry for stationkeeping, repositioning etc.

Practically, you'll also want to be able to reconfigure spot beam to backhaul mappings or even cross-connect some spot beams to cut satphone-to-satphone voice latency in half etc.

That's not even considering constellations like Iridium that do actual packet switching in space.

ptero 10/14/2025|||
That seldom works. Simple repeaters transmit the strongest signal they get and can be easily hijacked by a rogue ground transmitter. This is the main reason simple repeaters on orbit went out of fashion in the 1980s.
lxgr 10/14/2025||||
Exactly, and the little bit of data actually destined for satellites – which includes momentum wheel and booster control – is something you’ll definitely want to at least authenticate.

I believe that’s one of the few things that even amateur radio operators are allowed to encrypt for that reason.

Thorrez 10/14/2025|||
The only thing I can think of is maybe the satellite company runs compression on the data. Encryption would prevent that.
tgsovlerkhgsel 10/15/2025||
They could compress then encrypt before transmitting it over a radio link.
ryandrake 10/14/2025|||
Likely no consequences to the decision-makers for data exfiltration or other shenanigans happening, so there's nothing motivating a behavior change.

The reason security is so bad everywhere is that nobody gets fired when there's a breach. It's just blamed on the hackers and everyone just goes on with life singing "We take security very seriously--this happened because of someone else!"

devjab 10/14/2025|||
Who do you imagine will get fired? The CISO who's been recommending various security imporvements and been trying to get them implemented, but been unable to do so due to a lack of C level interest in IT. Or the C level's who lack interest in IT security until it bites them in the investor?

At least here in the EU we're moving toward personal responsibility for C level's who don't take IT and OT security serious in critical sectors, but in my anecdotal experience that is the first time anything regarding security has actually made decision makers take it serious. A lot of it is still just bureaucracy though. We have a DORA and NIS2 compliant piece of OT that is technically completely insecure but is compliant because we've written a detailed plan on how to make it secure.

gremlinunderway 10/14/2025||
Who currently gets fired due to engineering malpractice? It would be the same thing if there was actual certifications and engineering sign-offs in cybersecurity or other critical areas of development.

I wont pretend that accountability in the physical engineering world is all smiles and rainbows but at least there are actual laws dictating responsibilities, certification and other real consequences for civil engineers. When a Professional Engineer in Canada signs-off (seal) on work they are legally assuming responsibility which means the practitioner could be held accountable in the event of professional misconduct or incompetence regarding the engineering work. There is no reason but corporate greed and corruption why there isn't similar legislation in North America for cybersecurity or software engineering where you have professional bodies certify people to be legally obligated to sign-off on work (and refuse work that isn't up to standards).

But this would require introducing actual legislation which god-forbid how could we do such a thing to the poor market! It would stifle their innovation at leaking everyone's data.

There's no reason we couldn't extend the same existing system of licensure [1] that professional engineers require.

Sure maybe its overkill for someone stringing together a python app, but if you're engineering the handling of any actual personal information then this work ought to be overseen by qualified, licensed and accountable professionals who are backed by actual laws.

[1]https://en.wikipedia.org/w/index.php?title=Regulation_and_li...

chii 10/14/2025||||
> nobody gets fired when there's a breach

this must mean the consequences of such a breach has either not produced any visible damage, or the entity being damaged is uncaring (or have no power to care).

ozim 10/14/2025|||
If you fire people for stuff they didn’t maliciously introduced you will end up with no people to work with.

Imagine jailing doctors for every patient that died you would be out of doctors quite soon.

necovek 10/14/2025|||
The legal system already has sufficient cop-out: for anything that you should have been aware of, or would have been informed about.

Eg. doctors do get sued and fired for malpractice, if they did something no other skilled doctor would reasonably do ("let's just use the instruments from the previous surgery").

sayamqazi 10/14/2025||
Here are a bunch more things to make you even more scared.

- Oops! mistakenly left some instrument inside and sewed up the patient - Junior begging to do certain step of the surgery while the anesthesiologist asking them to just get a move on. - Administered a drug to a newborn baby which was supposed to be given to the mother. (My sister's colleague did this with no consequences)

nkrisc 10/14/2025||||
If the doctor is criminally negligent they could be jailed.
sayamqazi 10/14/2025|||
My sister knows a doctor who botched a surgery due to an argument with a junior who wanted to do some step of the surgery. The senior one was not having it at all and just threw the scalpel directly at him. Nothing happened to him because if we start firing doctors for this, we would be missing out on all the surgeries he did successfully.
fn-mote 10/14/2025||
> Nothing happened to him

There is a world of difference between "nothing happened" and being fired. Just like in the NBA, a fine (monetary penalty) of a sufficient size will get someone's attention without losing their skills forever.

ozim 10/14/2025|||
That's kind of obvious, I didn't think it has to be spelled out.
nkrisc 10/14/2025||
My point is that something doesn’t have to be malicious to be criminally negligent, if the law says so. I’m suggesting that some of the security breaches we’ve seen ought to have been criminally negligent. Perhaps they weren’t under existing law, but I think they ought to be.
nakedper 10/14/2025|||
We don't get delivered to us 18-year-olds that happen to be in perfect health. And a lot of Americans don't believe in wellness visits. Although more and more it's the insurance companies that are practicing medicine. Sorry it's a sore subject with me lol
protocolture 10/14/2025||||
>this must mean the consequences of such a breach has either not produced any visible damage

Yeah lets say you were carrying unencrypted frames for Bills Burger Hut.

The largest extent of the damage might be sniffing some smtp credentials or something. Bill sends some spam messages, never figures out how it was done but their IP reputation is always in the toilet.

Lets then say instead of Bills Burger Hut, you are carrying traffic for critical mineral and food industries. The attacker isnt a scammer, but a hostile nation state. Customer never realises, but theres a large, long term financial cost because (TOTALLY NOT CHINA) is sharing this data with competitors of yours overseas, or preparing to drop your pants in a huge way for foreign policy reasons.

No one gets fired until after the worst case long term damage, and even then probably not.

In fact, the likely outcome is that the burden gets moved to the customer for L2 encryption and the cowboy never changes.

ryandrake 10/14/2025||||
Or, the entity being damaged is not the decision maker and has no power to hold the decision maker responsible.
josephg 10/14/2025||||
End user license agreements are a huge part of the problem. Ideally users could sue if our data is leaked - and the threat of being sued would put pressure on companies to take security more seriously. Ie, it would become a business concern.

Instead we're constantly asked to sign one-sided contracts ("EULAs") which forbid us from suing. If a company's incompetence results in my data being leaked on the internet, there's no consequences. And not a thing any of us can do about it.

astrange 10/14/2025||
There is in at least California, the EU, and China. A lot of clauses in EULAs aren't actually legal.
devjab 10/14/2025||
On the other hand you can't sue a company for losing your data in many EU companies. You can report them to whatever data protection agency your country has, and after an investigation they can fine, and/or, in more serious cases turn the matter over to the police for a criminal investigation.

The disadvantage of this is that the local data protection agencies haven't been handing out very big fines. Sometimes that's due to company law. In my country you'd fine the owning company, which in many cases will be a holding company. Since fine sizes are linked to revenue and a holding company typically has no revenue, this means fines are often ridicilously small.

lmm 10/14/2025|||
Or the damage is diffuse whereas the costs of preventing the breach would be concentrated. Or the connection between the damage and the breach is difficult to prove.
notmyjob 10/14/2025|||
That and h1b abuse.
mjevans 10/14/2025|||
Why does Space need to decrypt a vast majority of the traffic? Flow can be just as brick not-smart as fiber optic cables under the sea.

Now, management, control, etc? Yeah those you need to decode in orbit.

JumpCrisscross 10/14/2025||
> Flow can be just as brick not-smart as fiber optic cables under the sea

Wouldn't this still leak metadata for routing?

lxgr 10/14/2025|||
Depending on the spot beam size, the only thing you'd always learn is the ground station's rough geographic location.

Anything else could be masked by metadata encryption, rotating lower layer identifiers, and cover traffic. Not sure if any actual protocols do that though.

etiennebausson 10/14/2025|||
It would not be perfect, but it wouldn't be purposefully shooting oneself in the foot.
dooglius 10/14/2025|||
The encryption of the payload doesn't need to take place on the satellites
protocolture 10/14/2025||
Thats very true.
feraloink 10/14/2025|||
The landing page has a Q&A. This is the relevant part of the response to the question, "Why aren't all GEO satellite links encrypted?"

>Encryption imposes additional overhead to an already limited bandwidth, decryption hardware may exceed the power budget of remote, off-grid receivers, and satellite terminal vendors can charge additional license fees for enabling link-layer encryption. In addition, encryption makes it harder to troubleshoot network issues and can degrade the reliability of emergency services.

So, the only suggestion that there would be greater heat/energy if they did encryption by default is the part about decryption (receiver) hardware having limited power budgets in some cases. There's more than what I copy-and-pasted above, but the overall message is that lots of organizations haven't wanted to pay the direct costs of enabling encryption... although they should.

EDIT: Link to Q&A https://satcom.sysnet.ucsd.edu/#qanda

lambdaone 10/14/2025||
It's not a spacecraft issue. Encryption can be done at the ground stations, and mandated as part of the standards for interfsce equipment, just like with DOCSIS. There's nothing, physically, to stop you passing unencrypted traffic down your DOCSIS cable, if you wanted to make a nonstandard modem and send unencrypted traffic on your local physical segment of the network. But the rest of the network will refuse to talk to it.

The same could have easily been mandated for satellite links - no encryption, your packet won't get forwarded to the internet at the ground station, and any packets sent to you from the internet will be sent to you encrypted. And all this can be implementd without needing to touch the satellite itself, which will continue to forward what it sees as unencrypted traffic without any design changes. It could even have been implemented incrementally on existing running services, with old and new equipment working side-by-side, but all new ground stations required to support encryption, and with a sunset date for old equipment, and a rolling upgrade program.

DOCSIS got this right in 1999; the satellite industry has had 25 yeqrs to catch up.

astrange 10/14/2025|||
Encryption is basically free as far as I know, but it is more complex and it must be hard to get software updates up there.
fransje26 10/14/2025|||
Here is their excuse:

> Panasonic told us that enabling encryption could incur a 20–30% capacity loss. In addition, when using IPsec, ESP and IP headers can introduce 20–30 bytes of overhead, which is nontrivial for small-packet applications like VoIP and video calls

lxgr 10/14/2025||
> Panasonic told us that enabling encryption could incur a 20–30% capacity loss.

Wow, I guess they're still betting on customers sending tons of redundant data up/down that they can shave off via compression? That's such a 90s modem thing to do. ("Faster than 56 kbit/s!!")

trenchpilgrim 10/14/2025|||
It is almost free on modern CPUs that have hardware acceleration, yea
15155 10/14/2025|||
Space-faring electronics aren't exactly cost-sensitive - the cost of a cluster of crypto-accelerated CPUs or rad-hardened FPGAs is peanuts compared to the human and launch costs that go into these satellites.
blackoil 10/14/2025||
Issue is the satellite was launched 10 years ago with 20-year-old tech. So, calculations of today may not be applicable on them.
tgsovlerkhgsel 10/14/2025|||
Wireguard uses ChaCha20, which to my knowledge neither has nor requires HW acceleration to be fast.
fragmede 10/14/2025|||
> However, the software performance [of wireguard] is far below the speed of wire.

https://github.com/chili-chips-ba/wireguard-fpga

lxgr 10/14/2025|||
It's faster on CPUs without dedicated hardware than AES, but that doesn't mean that it's faster than fixed-function AES hardware.
XorNot 10/14/2025||
I mean a bunch of those crypto systems turn out to be flawed though. So skipping the vendor implementation and using something in software instead could make sense.
klaff 10/14/2025||
Ah, this brings back memories of listening to long-distance phone calls using a C-band dish and a general coverage (aka shortwave) receiver. Voice channels were placed on single-sideband channels between roughly DC and 6 MHz, and that whole set of signals was transmitted to the particular satellite transponder just like a video signal would be. The dish receiver couldn't decode that but it had a subcarrier output intended for accessories (stereo decoders maybe?). By plumbing the subcarrier output to the antenna input of the shortwave radio you could dial around to individual voice channels. I could only hear one side of the calls, but it was still very enlightening. I heard a number of mundane conversations, one drug deal, and a woman cursing in ways I'd never heard before. This was pre-internet and I was an impressionable kid - maybe 13 or so. Fun times.
wyager 10/14/2025||
I see no issue with the satellite backhaul itself being unencrypted; anyone using the satellite provider should assume they're hostile and encrypt+authenticate everything they send anyway. I don't trust my ISP's fiber to be snoop-resistant just because they nominally have some shitty ONT encryption.

Obviously the specific examples of end-users failing to encrypt are bad, but that's not really a problem with the satellites.

varenc 10/14/2025||
If someone is browsing the internet on in-flight wifi, and their DNS requests get leaked this way, I don't really think its the casual airline user's fault for not encrypting their DNS traffic. Modern cell phone data traffic (4G/5G) is all encrypted, so the same unencrypted DNS requests can't just be passively sniffed. Something similar should happen here.

I'd blame the airline or their ISP provider for sending unencrypted traffic through the air like this. Not the satellite, but its top level customer. There's a big difference, IMHO, between your ISP being able to sniff your fiber traffic, and your traffic being observable from ~30% of the globe.

jeffrallen 10/14/2025||
It is the fault of the end user software not protecting them. This is why we have encrypted SNI (promoted by Cloidflare, for example).
mike_d 10/14/2025||
I don't know if you've ever tried to actually use in flight wifi, but any traffic not subject to inspection is heavily throttled to the point of being unusable.

ESNI is also a technology in search of a problem. It does not provide any meaningful security benefits.

jeffrallen 10/14/2025||
This. Bytes on every medium can be snooped. Internetworking means that your bytes go on mediums you don't know about and don't control. There's no such thing as a link where encryption is not needed, except localhost.
dsab 10/14/2025||
I was working in space industry and ECSS security guidelines are missleading grant seeking startups to try to reinvent TLS on orbit. There are to mamy bureaucracy. ECSS guidelines for software teams were created by people who never written a Hello World in their life, just look at specs of ECSS Packet Utilisation Service, it's a joke, that's why I prefer to work for VC funded companies than grant funded.
dweekly 10/14/2025||
Website: https://satcom.sysnet.ucsd.edu/

Wired: https://www.wired.com/story/satellites-are-leaking-the-world...

ROBLOX_MOMENTS 10/14/2025||
Is it correct to Assuming the amount of Mexican companies in this paper is because of their receiver being in the major city southwestmost corner of the country ?
fennec-posix 10/14/2025||
Yeah that's correct. The study was conducted in San Diego which falls under the satellite beam footprint required for services in Mexico.

If you were in say, Alice Springs in Australia (wink wink) for example, you'd be able to see traffic for Indonesia, Philippines, most of South East Asia, and perhaps parts of China, South Korea and Japan if the beams are right.

dylan604 10/14/2025|||
> wink wink

location location location is an apt phrase for more than just real estate

bediger4000 10/14/2025||||
I'm not so good at hints. Are you gesturing at the NSA facility at Pine Gap?
mike_d 10/14/2025||
Yes they are trying to be cheeky, but missing the mark.

Pine Gap is a large facility for collecting data coming down from our own satellites.

Foreign satellite collection in Australia happens at two other facilities: https://en.wikipedia.org/wiki/Shoal_Bay_Receiving_Station https://en.wikipedia.org/wiki/Australian_Defence_Satellite_C...

N19PEDL2 10/14/2025|||
And if you were in Harrogate, UK (more winks), you’d be in the footprint of satellites servicing Europe.
dboreham 10/14/2025||
You'd have a long walk to get to Menwith Hill.
jf 10/14/2025||
That’s my interpretation
fennec-posix 10/14/2025||
Section 6.3.2 is an eye-opener... good lord... Gets even worse at 6.4.2-3
Arrath 10/14/2025||
Am I offtrack in wondering if by reverse engineering the mentioned in-the-clear ATM communications you could (in theory) inject some malicious packets and in effect just dispense cash to yourself with a laptop and a dish? How very cyberpunk.
lambdaone 10/14/2025||
It's absolutely jaw-dropping. Either no-one at these companies was capable of understanding the problem, or no-one cared enough to do something about it.
yujzgzc 10/14/2025|||
From my time in similar companies, some people understand, and might care, but aren't empowered to do anything about it. They've got a job to do, and creatively auditing network security isn't it. Finding this kind of issue on the company clock won't get them promoted, on the contrary they'll look like they're slowing the team down with vulnerabilities to fix when they've got stuff to build and sell. Very poor security culture.
throwing_away 10/14/2025|||
Likely both.
lambdaone 10/14/2025|
Absolutely mind-boggling that this is a thing; not just that satellite links aren't per-user link-encrypted, but also that people are still using unencrypted protocols to exchange sensitive information on the public internet in 2025.
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