{"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":"149d90c9-70f3-4af8-b250-35289ffd92a7","kind":"skill:research-report","nodes":[{"acceptedSubmissionHash":"4dab8cb6ae7304b2b2b3a7f8dba0ec80be245685261551861755c53af2e29881","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":"149d90c9-70f3-4af8-b250-35289ffd92a7","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":"51141","feedbackHash":"7a66c3da1dbbc4e994624f0179be04d05131612f847126d09f5ab28cd6ad57a7","nodeKey":"research_report","submissionHash":"4dab8cb6ae7304b2b2b3a7f8dba0ec80be245685261551861755c53af2e29881","tag1":"verification:structural","tag2":"acceptance-v2","value":1}],"site":null,"snapshotHash":"1f3cbd49cabb34cf2ece54cd28c29ec3bc6d91c4ad8b0510cfcd5288ebe2e8e8","state":"completed","submissions":[{"artifacts":[{"bytes":2180,"hash":"53ca67654565b4ba64fcbf0eb183ff7fff5a0a81a66d9a183766d389a8190526","mediaType":"text/markdown","name":"report","path":"artifacts/report.md"}],"attempt":1,"bundleHash":"6683a08edc9093601195aaf566970bc8e5efade3bdc5596ea82eb20e03ea8235","device":"7d454e6cee88c390","findings":[],"hash":"4dab8cb6ae7304b2b2b3a7f8dba0ec80be245685261551861755c53af2e29881","nodeId":"0b40256f-7a82-4253-9144-bf5e80f47111","outcome":"completed","summary":"I found a real collision for keccak256 truncated to its first 48 bits, and a second, independent keccak library confirms it.\n\n- **inputA:** `imd-9804673` (read as UTF-8 text)\n- **inputB:** `imd-17368822` (read as UTF-8 text)\n- **Shared first 48 bits:** `0x2f72fe059bc2`. The two digests differ from bit 49 on.\n\n**How it was found:** a birthday search over the messages `imd-1`, `imd-2`, … in Node, using my own keccak256 code. It hit the collision after about 17.4 million hashes (about 2^24), in 2 min 24 s. That matches the expected cost. Before the search, my keccak256 code reproduced the published results for `\"\"` and `\"abc\"`.\n\n**Independent check:** the npm package `js-sha3@0.9.3` gives the same full digests for both inputs.\n\n**Remaining risk:** I couldn't see the verifier. The pair only collides if it uses original Keccak-256 (the Ethereum version), not the standard SHA3-256, which pads differently. That's the most likely reading of \"keccak256\", but I haven't confirmed it.\n\n`git status --porcelain` shows only `collision.json` as a new file. The two `artifacts/` files are hidden by the repo's local ignore list (`.git/info/exclude`) but exist on disk. All three are untracked and nothing was committed. The search script was in `test/scratch/` and isn't delivered.\n\nFiles are in the repo root:\n- collision.json\n- artifacts/report.md (facts, inferences and open questions)\n- artifacts/README.md (the question and the limits)","treeHash":"64c3bfd18d50bcfa0116ace7849310c0e2985bde","usage":{"cachedInputTokens":137871,"inputTokens":14,"model":"claude-opus-5-5","outputTokens":5659,"runtime":"claude","turns":7,"wallClockMs":210772}}],"verification":[{"checks":[],"detail":"paths and tree verified; no suite was run for this kind of work","evaluation":"structural","profile":"none","status":"accepted","submissionHash":"4dab8cb6ae7304b2b2b3a7f8dba0ec80be245685261551861755c53af2e29881","verifiedTreeHash":"64c3bfd18d50bcfa0116ace7849310c0e2985bde","verifierVersion":"0.1.0+41305fb5"}]}