r/crypto

A new round of gpg.fail attacks

SHA256 collision: The Kaoru Method

I don't think I know enough to comment on this, hence posting here [The Kaoru Method: Linearizing SHA-256 via Universal Fractional Space Mapping and Carry Reconstruction](https://osf.io/jd392/overview) More: - [Unexpected 186-bit SHA-256 quasi-collision: Is this mathematically possible with consumer hardware or …

Scholar Labs for Crypto?

Has anyone tried out Scholar Labs for crypto research? Is it any good?

Prime Sieve as Bits

In ancient of days (circa 1987-ish), I had coded a modified Sieve of Eratosthenes where single bits (rather than bytes) served as primality flags. Further, the mapping was such as to contain no bit addresses for multiples of 2, 3, …

Concept for random numbers...

Just this morning a means occurred to me for how I might generate a most extremely unpredictable pseudo-random number for encryption purposes. 1. Get the Nth pseudo-random from a fixed seed. 2. Permute it into a 64-element Knapsack key. 3. …

[39c3] Don’t look up (satellite insecurity talk by Nadia Heninger)

[39C3] To sign or not to sign: Practical vulnerabilities in GPG & friends (scheduled for 2025-12-27)

SHA-3 hardware acceleration

Does anyone know if proper SHA-3 acceleration is on the horizon for server and consumer hardware? Right now AFAIK only z/Arch has SHA-3 fully implemented in hardware, other architectures only have specific instructions for speeding up particular operations used within …

A new secure random number generator

Hi everyone, I'd like to share an secure crypto random number generator I created. I'll keep this post short and sweet so here are the links... PDF about the algorithm: [https://www.gsjournal.net/Science-Journals/Research%20Papers/View/10393](https://www.gsjournal.net/Science-Journals/Research%20Papers/View/10393) Source code in Java on GitHub: [https://github.com/wgilreath/CHARIBDIS](https://github.com/wgilreath/CHARIBDIS) I had …

New online (streaming) authenticated encryption scheme (FLOE)

Finally I can reveal something that I've spent the last year working on! Let me present FLOE (Fast Lightweight Online Encryption). It's a new online authenticated encryption scheme which is designed to meet real world requirements. We provide a [public …