Posts
Black is white and white is not black
Great, you’ve just read a genuine contradiction. In classical logic, once your assumptions contain something of the form “P and not P”, the system explodes: from that point on you can prove \*\*anything\*\* you like. (yes, we assume "is" is a symmetric equality) Want to “prove” that God does not …
A branchless modulo alternative with ~6x speedup for polynomial additions on ARM (REIST Division)
While working on modular arithmetic for lattice based cryptography, I experimented with a generalized form of integer division that uses a symmetric remainder interval instead of the classical non-negative one. The goal was not to change semantics in cryptographic algorithms, but to simplify the reduction step that dominates polynomial additions. …
Is it possible to lift Elliptic curves over finite fields to Elliptic curve over dual numbers?
This is for the discrete logarithm. I don t even need for the lifted points to be dependent. Of course, this is possible to anomalous curves, but what about secure curves?
WebRTC and Onion Routing Question
I wanted to investigate about onion routing when using WebRTC. Im using [PeerJS](https://peerjs.com/) in my app. It allows peers to use any crypto-random string to connect to the peerjs-server (the connection broker). To improve NAT traversal, im using [metered.ca](http://metered.ca/) TURN servers, which also helps to reduce IP leaking, you can …
Schmieg: ML-KEM Mythbusting
https://keymaterial.net/2025/11/27/ml-kem-mythbusting/
🧩 I built a full RSA Challenge website — all RSA numbers, real ciphertexts, SHA-256 verification. Try breaking them!
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What is the status of WhatsApp backups?
WhatsApp offered end-to-end encrypted backups in the past, which users could enable or disable: [https://faq.whatsapp.com/490592613091019/?cms\_platform=android](https://faq.whatsapp.com/490592613091019/?cms_platform=android) At present, there is a backup feature that's always turnned on, but if you follow those instructions, then you'll simply trigger a cleartext backup. Instead, the end-to-end encrypted backup option has moved and seems well …
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.