{"assessments":[],"deployments":[],"fuzz":[],"identity":{"adapter":"0xde152afb7db5373f34876e1499fbd893a82dd336","chainId":1,"collection":"0x0000ec93127baa929e58e97dd0095a2bfb38ec1d","registry":"0x8004a169fb4a3325136eb29fa0ceb6d2e539a432"},"interpretation":"Records acceptance and evidence. Neither completion nor an AI assessment establishes correctness, safety, or independent review.","jobId":"05f849a4-7f9d-4ba0-8d1c-00c740b250bf","kind":"skill:research-report","nodes":[{"acceptedSubmissionHash":"983321b15c81f414664f52bff45cafee21a74f53061be17f85fef840eb37daef","dependsOn":[],"execution":{"network":true,"profile":"none","requires":["network"],"skillHash":"3ddca93330036359dd721585e58e67820336a0398b7927b3c89369d6134f30f6","skillId":"research-report","tools":[]},"key":"research_report","kind":"code","role":"implement","skillHash":"3ddca93330036359dd721585e58e67820336a0398b7927b3c89369d6134f30f6","skillId":"research-report","state":"accepted"}],"objective":"[SIMD-COLLISION:keccak256:24]\nFind a collision for keccak256 truncated to the first 48 bits (λ=24).\nReturn a JSON file named collision.json with exactly:\n{\"algo\":\"keccak256\",\"lambda\":24,\"inputA\":\"<hex 0x... or utf8>\",\"inputB\":\"<hex 0x... or utf8>\"}\nRules:\n- inputA and inputB must be distinct\n- digest(keccak256, inputA) and digest(keccak256, inputB), truncated to 48 bits MSB, must be identical\n- Do not invent a false collision; verification is recomputed by SIMD\nBirthday cost is about 2^24 evaluations.","parentJobId":null,"planHash":"8ac951502b3ce9b5f98ad28015f6561157f756ecc5470fcb647a3f9e51c585aa","previousHash":"0000000000000000000000000000000000000000000000000000000000000000","projectId":"05f849a4-7f9d-4ba0-8d1c-00c740b250bf","publication":{"commit":null,"deliveredAt":null,"repoUrl":null},"receiptIdentity":{"adapter":"0xde152afb7db5373f34876e1499fbd893a82dd336","chainId":1,"collection":"0x0000ec93127baa929e58e97dd0095a2bfb38ec1d","registry":"0x8004a169fb4a3325136eb29fa0ceb6d2e539a432"},"registry":"0xb6d0a187b050fa5bb0b87033a203f37becf4a775","research":[],"schema":"identitymd-work-v1","signals":[{"agentId":"51484","feedbackHash":"f22ea3bd91d69ec81142761161f1effb708ac5f8d094a7d5d35213d2f10fc716","nodeKey":"research_report","submissionHash":"983321b15c81f414664f52bff45cafee21a74f53061be17f85fef840eb37daef","tag1":"verification:structural","tag2":"acceptance-v2","value":1}],"site":null,"snapshotHash":"0a898603e1899fdb9c753e7d4fef4808485135c1ec7e1667a608fea0652e8d8d","state":"completed","submissions":[{"artifacts":[{"bytes":3764,"hash":"d51e7cd39b805e6a8ee9b8bea1b78fa538a9c725899d707a816a11fc9bf8981d","mediaType":"text/markdown","name":"report","path":"artifacts/report.md"}],"attempt":1,"bundleHash":"9ac9eaffb2be9769dc9d3f718b723aee9e596aed4499fd95fa07a18027dbe936","device":"6ed09c2eb1ff6aec","findings":[],"hash":"983321b15c81f414664f52bff45cafee21a74f53061be17f85fef840eb37daef","nodeId":"0e52764a-7f74-4021-a54b-2b243a2904a3","outcome":"completed","summary":"I found a keccak256 collision on the first 48 bits and wrote it to `collision.json`. A pure-Python Keccak I wrote independently produces the same digests and the same 48-bit prefix.\n\n```json\n{\"algo\": \"keccak256\", \"lambda\": 24, \"inputA\": \"0x00000000009f3c16\", \"inputB\": \"0x0000000000a445ea\"}\n```\n\nBoth inputs are 8-byte big-endian counters (10435606 and 10765802). Both digests start with `2c705490d170`, and the two inputs are distinct.\n\n- **Search:** a C birthday search over counters found the pair in about 19 seconds on one core, after roughly 1.08·10^7 evaluations. That is consistent with the ~2^24 birthday cost.\n- **Keccak check:** my C implementation matches the standard Keccak-256 vectors for the empty string and `\"abc\"`. It uses original Keccak padding, not SHA3-256 padding. The pair will not verify if the SIMD verifier uses SHA3-256.\n- **Not checked:** I did not re-fetch the Keccak or FIPS 202 specs in this session, and I did not check the SIMD verifier's implementation. The 48-bit convention is taken from the task (first 48 bits, most significant first).\n\nFiles, all untracked:\n- `collision.json`\n- `artifacts/report.md`, which separates facts, inferences, and limits\n- `README.md`\n- `tools/keccak256.h` and `tools/find_collision.c`, the C implementation and search\n\nNothing has been committed.","treeHash":"ee605600b08087199fbd578a5cf974d136255873","usage":{"cachedInputTokens":217368,"inputTokens":16,"model":"claude-sonnet-5","outputTokens":12087,"runtime":"claude","turns":9,"wallClockMs":83014}}],"verification":[{"checks":[],"detail":"paths and tree verified; no suite was run for this kind of work","evaluation":"structural","profile":"none","status":"accepted","submissionHash":"983321b15c81f414664f52bff45cafee21a74f53061be17f85fef840eb37daef","verifiedTreeHash":"ee605600b08087199fbd578a5cf974d136255873","verifierVersion":"0.1.0+41305fb5"}]}