#Cryptography

Systems that guard our email and bank accounts are vulnerable to attacks, but building on the best defenses will buy time and prevent a crisis, writes Tyler Cowen.

Recovering the key and text of a 1542 cipher from Cardinal Alessandro Farnese to Giovanni Poggio.

How Devin and a Cognition researcher built the world’s highest-performance GPU lattice siever, to make factoring numbers 10x cheaper than the previous state of the art

Reticulum is the cryptography-based networking stack for building local and wide-area networks with readily available hardware. Reticulum can continue to operate even in adverse conditions with very high latency and extremely low bandwidth.

After a long day of exhausting conversations about Hybrid Post-Quantum Cryptography, random jackasses trying to play gotcha with endpoint attacks against end-to-end encrypted messaging apps, and me…

With AI evolving exponentially and solving increasingly difficult problems, how realistic is the threat that quantum computing advances faster than expected? Would Bitcoin realistically be able to adapt in time?…

TLDR; I had some fun playing around with combining columnar transposition with substitution, which turns out to be surprisingly strong. Almost certainly not "properly strong", but not trivial to break with computers either.…

I was in need of replacing my ssh-key for Gitlab today since it expired so I thought I might as well switch over to a PQC protocol rather than Ed25519. I was a bit stunned to find out that this is apparently not supported yet.…

I'm not sure if it's the right subreddit to post in, but I was wondering why AES256 is slower on my CPU (Snapdragon 888 which does have AES acceleration) than ChaCha20 and maybe anybody knows the reason.…

Do all modern devices basically reach a point where everyone has to trust the RNG for modern encryption? The software PRNG like dev/urandom can be audited, but how does anyone audit the hardware RNG's?…

Greetings, I'm currently reading W. Friedman's Military Cryptanalysis Part 1 and doing the exercises. I'm getting stuck quite frequently at transpositional crypotgrams, namely the ones where the letters of a word are transposed.…

Example use case, an imageboard where the server hosts a public membership tree containing identity commitments. Each time a user holding an identity secret can generate a new anonymous identity by proving membership within the membership tree and…

r/cryptography 5mo ago u/QuantumPhyZ I'm gonna do a Cyptography an Code Theory internship, need help Hello! Like the title says. I'm gonna do an internship in Cryptography (it's only one month though!…

I want to encode a text with a cypher i made up. My idea is to use a caeser cypher to encode every other letter but the remaining letters are encoded with the same number of the cypher in the opposite direction. E.G.…

Hello guys ! I'm organizing a scavenger hunt for my wedding and I want to hide a message in the musical sheet on the piano that I have at the wedding place. The musical sheet are written already but I want to hide a message in it with invisible ink.…

I've already read Intro to Modern Cryptography by Katz and Lindell (the third edition), I also took a university course about modern cryptography, and I'm currently taking a side-channel attacks graduate university course (which is soooo cool).…

Hi, I'm a CS student currently trying to find a topic for my bachelor thesis. We covered elliptic curves and the ECDLP in one of our modules. I think it is an interesting topic, so I've been reading into it a bit more on my own.…

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