r/crypto

Google's Tink crypto lib: EdDSA potentially exploitable implementation

Grover's Algorithm Against Password Hashing?

I am aware it is thought that modern password hashing algorithms are capable of being resistant to Grover's Algorithm. However, the truth is Grover's Algorithm still reduces the bit security of passwords effectively by half. If I use a password with 128 bits of security Grover's Algorithm would reduce the …

Zen and the Art of Microcode Hacking - Why to not use CMAC as a hash

AI Thinks It Cracked Kryptos. The Artist Behind It Says No Chance

ePrint: PEGASIS: Practical Effective Class Group Action using 4-Dimensional Isogenies

Learn how to break AES

Join us next week on Mar 13th at 3PM CEST for an FHE.org meetup with Agnes Leroy, GPU Director at Zama, who will be discussing Implementing FHE on GPUs. RSVP here!

High School Assignment: RSA Encryption in Python

I got an assignment in Computer class to code a functioning RSA program/script in Python. The thing is, I have no idea how. My class has never programmed with Python, and just setting it up on my computer was a difficult task. I've got the basics behind the mathematics of …

Creating recovery keys using SSSS

Is Shamir's Secret Sharing Scheme a secure way for splitting a master key into multiple shares - say one primary share and one backup share? For example if I generate an AES master key, I can split it into 4 shares with a threshold of 2 - I then combine …

Open-Source Python Toolkit for Visual Secret Sharing (VSS)

Hey everyone, Over a year ago, I worked on my thesis on Visual Secret Sharing (VSS). While I’m not a mathematician, I read a ton of papers on Visual Cryptography and Random Grids, implementing various schemes just to generate images for my thesis. Rather than letting all that code go …