{"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":"dbf9fbbd-07a2-415a-ae57-53aec9d1aed3","kind":"skill:research-report","nodes":[{"acceptedSubmissionHash":"a95b49e862fee7ea50049e698bd8e90376f99b2dead4aa65b3665847807f2360","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":"dbf9fbbd-07a2-415a-ae57-53aec9d1aed3","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":"51509","feedbackHash":"dc8924edf51fa9d1308e597d4dd0557cbf88b733121b82611228c41430d787d3","nodeKey":"research_report","submissionHash":"a95b49e862fee7ea50049e698bd8e90376f99b2dead4aa65b3665847807f2360","tag1":"verification:structural","tag2":"acceptance-v2","value":1}],"site":null,"snapshotHash":"e8f40fc003e68369fd6c81d72c80415b1d52e6eb2faa4a671289829817a6190c","state":"completed","submissions":[{"artifacts":[{"bytes":2788,"hash":"eeae463776d4248ab0d625b1f2606e5a762c45b9ac2f703e3fa1c53a3967bd92","mediaType":"text/markdown","name":"report","path":"artifacts/report.md"}],"attempt":1,"bundleHash":"e8a9f5c45939bdfdf9bc4cd2b4e131b0ecc293ca5b5b5c1785898759be7905be","device":"74a99f640688d37b","findings":[],"hash":"a95b49e862fee7ea50049e698bd8e90376f99b2dead4aa65b3665847807f2360","nodeId":"0e84c303-2f10-4822-aa0f-ddf54431c25c","outcome":"completed","summary":"I found a real collision: two different 8-byte inputs whose keccak256 hashes share the same first 48 bits. Both hashes were checked with two separate implementations.\n\n**`collision.json`:**\n```json\n{\"algo\":\"keccak256\",\"lambda\":24,\"inputA\":\"0x00000000007004e7\",\"inputB\":\"0x00000000016de6f6\"}\n```\n- `0x00000000007004e7` → `02649afb324c`833597b7…56861f\n- `0x00000000016de6f6` → `02649afb324c`9eef48af…61eff4\n\n**How it was found and checked:**\n- I wrote a Keccak-256 tool in C (`tools/keccak_collide.c`). It gives the standard Ethereum results for `\"\"` and `\"abc\"`. Switched to SHA3-256 padding, it matches Python's `hashlib.sha3_256`.\n- It hashed 2^26 counter inputs, sorted their 48-bit prefixes and found 9 colliding pairs in 11.7 s. About 8 were expected, so the hash behaves as it should.\n- The npm library `js-sha3` v0.9.3, installed only for testing, gave exactly the same full hashes for the chosen pair.\n\n**Assumptions I couldn't check:** I didn't have the verifier's source, so two things are assumed.\n- \"keccak256\" means the Ethereum/original Keccak padding. If the verifier uses standard SHA3-256 instead, this pair doesn't collide.\n- `0x…` inputs are read as raw bytes. If they're hashed as UTF-8 text, the pair doesn't collide either.\n\nBoth are written up in `artifacts/report.md`, which separates facts, inferences and open questions.\n\n**Delivery:**\n- `collision.json` and the C tool are committed in `3cc37c6`. Git had no user identity set, so I passed your name and email on the commit command instead of changing `.git/config`.\n- `artifacts/report.md` and `artifacts/README.md` are untracked, and `artifacts/` is gitignored anyway, so they will go out through the separate upload, not the commit.","treeHash":"0dcbd79c3dc5ea6d6d27b40cfb9232a0ce9f6792","usage":{"cachedInputTokens":279758,"inputTokens":22,"model":"claude-opus-5-5","outputTokens":8931,"runtime":"claude","turns":13,"wallClockMs":97769}}],"verification":[{"checks":[],"detail":"paths and tree verified; no suite was run for this kind of work","evaluation":"structural","profile":"none","status":"accepted","submissionHash":"a95b49e862fee7ea50049e698bd8e90376f99b2dead4aa65b3665847807f2360","verifiedTreeHash":"0dcbd79c3dc5ea6d6d27b40cfb9232a0ce9f6792","verifierVersion":"0.1.0+41305fb5"}]}