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Friend gave me a ciphertext + “key”, but nothing decrypts. What am I missing?
Crossposting from r/crypto101 — looking for more technical insights on possible AEAD/KDF formats.
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Why isn't chacha20 NIST approved ?
It's quite odd that chacha20 is not approved by NIST, yet it's so widely used, even in TLS.. Why doesn't NIST acknowledge chacha20 ? Those NIST folks are a quite sketchy people
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ChaCha20 for file encryption
Hi, assume I have an application, that already uses chacha20 for other purposes, Now some local state data is pretty sensitive so I encrypt it locally on disk. It is stored in one file, and that file can get quite …
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Modular exponentiation in RSA?
To keep the interim value from blowing up, rather than do MOD after EXP, can the EXP algorithm do a MOD at every internal step?
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512 bit symmetric algorithms ?
Hi, Considering how Groover's algorithm would essentially cut the possibilities of any key of length N bits to N/2 bits, cutting the possibilities in half and making 256 bit reduced to a mere 128, the absolute baseline of security by …
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Hybrid asymmetric encryption scheme
Hi, looking to get some eyeballs on the following scheme / idea Imagine you have a ML-KEM keypair, and a Classic McEliece keypair. You generate a shared secret with each KEM, then the result, you XOR it together to derive …
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Request for review: Aeon Secure Suite v4.4 – offline WebCrypto toolkit (+ MicroVault v1.9 air-gapped file vault)
Hi all, I’d like to share something I’ve been building and ask for honest feedback and critique on the \*\*cryptography and implementation details\*\*. I’m \*\*not\*\* a professional developer or cryptographer. I’m a person who believes technology should serve humanity, not …