Posts
[Research] Guardian: Role-Gated MPC Wallets for AI Agents
We're a group of researchers and have just prepared a draft addressing a gap in cryptographic custody for autonomous agents. The problem: agents executing autonomously need key custody, but are the least trustworthy entities to hold keys alone. Existing solutions (hot wallets, smart accounts, TEEs, standard MPC) have fundamental gaps …
Deterministic path-walking cipher over a keyed permutation grid — looking for structural analysis
I’ve published an experimental symmetric construction and would appreciate technical critique. GitHub: [https://github.com/alt160/Zifika](https://github.com/alt160/Zifika) # Model summary Zifika is a deterministic keyed path-walking cipher defined over a 2D permutation grid: * The key consists of `N` rows, each a permutation of bytes 0..255. * A PRF-derived jump stream updates `(row, col)` …
The Quantum Threat: Industry Standards for PQC and the Unique Road to a Post-Quantum Bitcoin
The cybersecurity working group from the Crypto Valley Association (CVA) is presenting their next session on February 19th at 5-6pm. Please see all details at https://luma.com/CVA-Cybersec-Feb At this meeting, Sonia Duc and Markus Perdrizat will explore the intersection between enterprise-grade security and decentralized resilience, examining how industry players are preparing …
Browser‑only HMAC‑based toy cipher demo (DrMoron) — now live with URL‑encoded ciphertext
I’ve been working on a small educational cipher experiment called DrMoron. Refer to: [https://www.reddit.com/r/crypto/comments/1r369lv/drmoron\_a\_cipher/](https://www.reddit.com/r/crypto/comments/1r369lv/drmoron_a_cipher/) It’s not intended to be secure — just a playground for exploring HMAC‑driven keystream generation, feedback, and deterministic test vectors. I finally finished the browser version, and it now produces byte‑for‑byte identical output to my C/Python …
The Verification Theater: When Formal Methods Create False Assurance in Cryptographic Libraries
How did I do on the implementation of AES in my new chat system for terminal based E2EE communication?
The server is a rudementry TCP relay which does three things. Accepts incoming connections, tracks connected clients, rebroadcasts live encrypted blobs and the last 100 messages. When a room password is provided, all messages are encrypted using AES-256-GCM. The encryption key is derived from the password using PBKDF2-HMAC-SHA256 with 100,000 …
Application-Level Cascading Cipher
[https://positive-intentions.com/blog/cascading-cipher](https://positive-intentions.com/blog/cascading-cipher) i wanted to improve the encryption i was using in my webapp. i already know that webRTC is encrypted by default, but that isnt anywhere near as respected as the signal protocol and it wouldnt be quantum-secure. understandably, people are not looking towards browser-based solutions for post-quantum cryptography, but …
DrMoron... A Cipher...
Here is a little cipher I have been working on for some years. I am wondering what you all think about it? Here is an old write up: [http://funwithfractals.atspace.cc/ct\_cipher/](http://funwithfractals.atspace.cc/ct_cipher/) And some code that uses a TRNG, well, it better be a TRNG because my algo relies on it: """ DrMoron: …