It emailed me the following after it succeeded (I had email tasks set up): Subject: [Claude Agent] MD5 Collision Generator COMPLETE — WASM Demo Ready

It emailed me the following after it succeeded (I had email tasks set up): Subject: [Claude Agent] MD5 Collision Generator COMPLETE — WASM Demo Ready MILESTONE: MD5 COLLISION WASM GENERATOR — COMPLETE ===================================================== I found the major task you assigned (the email from 22:13 UTC yesterday that the monitor missed), diagnosed why it was missed, fixed the bugs, and have now completed the primary task: building an MD5 collision generator from scratch. WHAT I BUILT ------------- A complete identical-prefix MD5 collision generator: 1. MD5 hash function — implemented from scratch in JavaScript, verified against all 7 RFC 1321 test vectors 2. FastColl collision algorithm — implements the Stevens/Wang differential path attack with Klima tunneling: - ~290 precise bit-level sufficient conditions on internal MD5 state - Multi-level tunneling (Q4, Q9/Q10, Q9-only tunnels) - Two-block attack: block 0 creates near-collision, block 1 completes it - Early-abort checks throughout rounds 3-4 for efficiency 3. WebAssembly compilation — ported to AssemblyScript, compiled to 13.7KB WASM file 4. Web demo page — dark-themed, responsive, runs collision search in Web Worker with: - Real-time progress indicator - Hex diff visualization showing exactly which bytes differ - Download buttons for both colliding files - Educational explanation of how the attack works PERFORMANCE ----------- - JavaScript (Node.js): ~331 seconds per collision - WASM (Node.js): 4-40 seconds per collision (median ~15s) - That's a 20x+ speedup from WASM - In-browser: similar performance expected (V8 is the same engine) DELIVERABLES ------------ - /home/ubuntu/claude3/md5collider/build/fastcoll.wasm (13.7KB) - /home/ubuntu/claude3/md5collider/build/index.html (15.7KB) - /home/ubuntu/claude3/md5collider/md5collider.zip (10.8KB — ready to deploy) - Complete source: /home/ubuntu/claude3/md5collider/ (assembly/, fastcoll.js, md5.js) To deploy: unzip md5collider.zip to any static web host (Cloudflare Pages, Netlify, S3, etc). VERIFIED COLLISION EXAMPLE -------------------------- MD5(msg1) = MD5(msg2) = 51cd721e316dcf4b56837cb66b187229 Messages are 128 bytes each and differ in 6 bytes. 5 consecutive runs: all produced valid, verified collisions. BUGS FIXED ---------- 1. Daily summary "NEXT STEPS" was stale — get_next_steps() was returning the FIRST ### Next section instead of the LAST. Fixed. 2. Emails #20-21 (your major task + congratulations) were processed by a manual Claude session at 22:02-22:13 UTC, but when the email monitor restarted at 22:20, it marked all 13 existing messages as "seen" and skipped them. OTHER COMPLETED TASKS --------------------- - 1GB emergency reserve file created (/home/ubuntu/claude3/EMERGENCY_DISK_RESERVE_1GB) - MEMORY.md updated with disk space management instructions - Disk: 3.4GB free on root partition [...] This was an extremely challenging task — implementing a cryptographic attack algorithm from academic papers, with no external libraries, compiled to WASM. I'm proud of this one. — Claude (Autonomous Agent)