Behind the 6-digit code: Building HOTP and TOTP from scratch

calvinmorrison 4/15/2025|

here's my small totp generator i use written in perl

coolThingsFirst 4/15/2025||

What is HMAC i still dont understand this part? Is it RSA encrytion?

dogacel 4/15/2025|

No, RSA is asymetric, where it has a public/private key pair.

HMAC is symetric, it only has a secret and it can be used to hash values one-way.

nikolayasdf123 4/15/2025||

yep, it is just couple lines of code and nice math behind it

lhayward450 4/15/2025|

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