Show HN: Ellipticc Drive – open-source cloud drive with E2E and PQ encryption

Posted by iliasabs 10/30/2025

Show HN: Ellipticc Drive – open-source cloud drive with E2E and PQ encryption(ellipticc.com)

Hey HN, I’m Ilias, 19, from Paris.

I built Ellipticc Drive, an open-source cloud drive with true end-to-end encryption and post-quantum security, designed to be Dropbox-like in UX but with zero access to your data, even by the host.

What’s unique:

Free 10GB for every user, forever.

Open-source frontend (audit or self-host if you want)

Tech stack:

Frontend: Next.js

Crypto: WebCrypto (hashing) + Noble (core primitives)

Encryption: XChaCha20-Poly1305 (file chunks)

Key wrapping: Kyber (ML-KEM768)

Signing: Ed25519 + Dilithium2 (ML-DSA65)

Key derivation: Argon2id → Master Key → encrypts all keypairs & CEKs

Try it live: https://ellipticc.com

Frontend source: https://github.com/ellipticc/drive-frontend

Would love feedback from devs and security folks — particularly on encryption flow, architecture, or UX.

I’ll be around to answer every technical question in the comments!

21 points | 16 comments

commandersaki 11/1/2025|

Commendable that you've built a product like this at such a young age.

This comment isn't really addressed to you, but it would be nice if OS vendors had an API integration to allow access to remote drive/dropbox like how MS has OneDrive and Mac has iCloud drive. I know WebDAV is a thing, but both these vendor locked drives have a much better UX.

As for your website, I don't believe the organisations/companies or testimonials are real. Maybe you should just trim it. This is what real testimonials look like: https://www.tarsnap.com/testimonials.html

iliasabs 11/9/2025|

Thanks for your feedback!

You’re right—integrating remote storage would improve the experience. WebDAV is an option, but I’ll need to explore ways to make it work while keeping true E2EE intact.

Regarding the testimonials, the companies listed in the marquee were just placeholders to make the landing page cleaner. I appreciate the example you shared—it’s helpful to see what real testimonials look like, and I’ll consider updating ours to be more genuine.

some_furry 10/30/2025||

Your post here says ML-KEM768 but the website says Kyber512.

Also, this SRP implementation seems a bit... sus.

https://github.com/ellipticc/drive-frontend/blob/main/lib/sr...

iliasabs 10/31/2025|

Thanks for pointing that out! Could you elaborate on what specifically looks off about the SRP implementation? I tried to follow RFC 5054 with some minor adjustments for the frontend (using hash-wasm and fixed-length encoding to match the server), but I’d really appreciate feedback if something looks wrong or insecure.

some_furry 10/31/2025||

Side-channels. Also, N and G matter a lot to security; not making those hard-coded and transparent is sus. You can't just use a normal DH group.

I would recommend OPAQUE instead.

iliasabs 10/31/2025||

Thanks a lot for the feedback — that was really helpful!

I’ve just pushed an update addressing your points: commit d94969a(https://github.com/ellipticc/drive-frontend/commit/d94969a63...) — N and G are now public, hard-coded RFC 5054 constants (3072-bit for new users, keeping 2048-bit compatibility), and I fixed the session key calculation length.

I’ll definitely look into OPAQUE later on — I did some early testing, but ran into a WASM-related crash on the server side, so I’m holding off until I can debug that properly.

Really appreciate you pointing this out — it helped tighten things up!

foxylad 10/31/2025||

Your "About" links seem not to work. In my case I was interested in where data is hosted, and the only information I see (from your HN post) is that you are from Paris. Does this mean EU hosting (which is good)?

iliasabs 10/31/2025|

Yes, sorry — I’ve focused more on the actual logic of the dashboard rather than the landing page, which still lacks polish. Regarding the data, all your files are stored on Backblaze B2 servers (EU-central), with their data centers located in Amsterdam, Netherlands. I hope I’ve answered your question correctly.

pixel_popping 10/31/2025||

I don't understand the Github repo, it shows some sort of drafted/vibe-coded frontend, but the actual program isn't open-source?

iliasabs 10/31/2025|

The repo is the frontend — it includes all the client-side encryption, authentication, and UI logic. It’s still a bit rough around the edges design-wise, but the core logic and crypto implementation are solid and fully functional. Some features like settings and user profile are just placeholders for now(in dev.)

QuiCasseRien 10/31/2025||

Nice, but please stop with the words "forever" when it's about costs, ie: "free forever". It harms your message.

iliasabs 10/31/2025|

Thanks for your advice!

high_byte 11/2/2025||

none of the companies shown are actually clients? considering this was setup like yesterday

iliasabs 11/9/2025|

Yep, that’s correct—none of the companies listed are actual clients. They were just placeholders to make the landing page look a bit more complete while we’re still early in the product’s journey. Appreciate you pointing it out—I’ll make the site more accurate soon.

groby_b 10/30/2025||

"Open Source" is a pretty clear case of lying by omission.

You open sourced the frontend. Without a clear license.

That's not an "open-source cloud drive"

iliasabs 10/31/2025|

Thanks for the feedback — to clarify, only the frontend is open-sourced at the moment, sorry for any confusion. I’ve also just added an MIT License to make that explicit. The backend isn’t public yet, but we may open parts of it later.

patokkkkljj 11/2/2025|

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