Posts
Post-Quantum Cryptography for the PHP Community
A Cryptography Engineer’s Perspective on Quantum Computing Timelines
Bitsliced first-order masked AES-128 decryption in Cortex-M0 assembly — how many traces to break it?
Wrote this from scratch for a university smart card lab course — couldn't find any usable reference implementation of bitsliced first-order masked AES in assembly, so I had to write one. Key details: * Platform: STM32F051 (Cortex-M0, 8 MHz) * 26,801 cycles * Bitsliced representation: 16-bit per bit-plane * S-box: …
Mongoose: Preauth RCE and mTLS Bypass on Millions of Devices
It is possible to use the Ueli Maurer s Diffie Hellman reduction to transfer the discrete logarithm problem from an elliptic curve to a finite field?
The [original paper](https://crypto.ethz.ch/publications/files/Maurer94.ps) ("Towards the equivalence of breaking the Diffie-Hellman protocol and computing discrete logarithms") solves the discrete logarithm problem using a Diffie-Hellman oracle and auxiliary groups. It also transfers the problem from a finite field to solving the discrete logarithm on an elliptic curve. It was since extended for …
PGP Tools: A zero-permission Chrome extension using WebAuthn PRF for PGP key management
I built Chrome extension for PGP and I think the cryptographic approach is interesting enough to share here. The extension uses WebAuthn PRF to derive a master key from a passkey, which encrypts/decrypts the user's PGP private keys and contacts at rest. No passwords if you don't want them, no …
Understanding the Ultrahonk Verifier
AI-Enhanced Traffic Analysis of Post-Quantum Encrypted Network Packets
One of my biggest concerns for online privacy is that even after PQC adoption of TLS Traffic takes off--people will simply apply statistical analysis of encrypted network packets to figure out what people are doing. Problems like this have been shown: 1. From the Whisper Attack (https://www.microsoft.com/en-us/security/blog/2025/11/07/whisper-leak-a-novel-side-channel-cyberattack-on-remote-language-models/) 2. And AI-enhanced …
[Cryptanalysis] Theoretical reduction of logical depth (T-count) for Shor's algorithm via Z/6Z Topological Superselection (with exact MPDO simulation)
Hi everyone, I am an independent researcher and I recently published a theoretical paper focusing on quantum cryptanalysis, specifically targeting the resource estimation and initialization phase of arithmetic search algorithms like Shor's. Since this sub focuses heavily on modern cryptography and the ongoing transition to PQC, I wanted to share …
This subreddit is now about Quantum Cryptography
In order to keep up with quantum leaps in a technology which is about to leave the lab at the rate of graphene, a change in phase is necessary and we will need to align with the virtual sea of change with full charge. If it makes your head spin …