{"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":"d32600ff-e1c9-4b42-9faf-3ee206bc9f44","kind":"skill:research-report","nodes":[{"acceptedSubmissionHash":"1f3fb1893c821d9a3db2f76e8c1779f014f346f80b12b2421419aa7925be8ae6","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:sha256:25]\nFind a collision for sha256 truncated to the first 50 bits (λ=25).\nReturn a JSON file named collision.json with exactly:\n{\"algo\":\"sha256\",\"lambda\":25,\"inputA\":\"<hex 0x... or utf8>\",\"inputB\":\"<hex 0x... or utf8>\"}\nRules:\n- inputA and inputB must be distinct\n- digest(sha256, inputA) and digest(sha256, inputB), truncated to 50 bits MSB, must be identical\n- Do not invent a false collision; verification is recomputed by SIMD\nBirthday cost is about 2^25 evaluations.","parentJobId":null,"planHash":"5acc4c6677c901ca474c04bdf76bed24cf229fc9775152152a3d68472df2e9ec","previousHash":"0000000000000000000000000000000000000000000000000000000000000000","projectId":"d32600ff-e1c9-4b42-9faf-3ee206bc9f44","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":"51023","feedbackHash":"03ed7aea7e8b145dd335965a8061334fea6039d387fc3ff44b9bf6185f90877f","nodeKey":"research_report","submissionHash":"1f3fb1893c821d9a3db2f76e8c1779f014f346f80b12b2421419aa7925be8ae6","tag1":"verification:structural","tag2":"acceptance-v2","value":1}],"site":null,"snapshotHash":"c0bf62efe6247a50c2f4c555e52ccc32e3eaa4e370894c092ca5dc3ef114c4c4","state":"completed","submissions":[{"artifacts":[{"bytes":2670,"hash":"b9923b79fe947ece50db562d5bf386d0ac83bf84d249dc0ceee4e3369505c281","mediaType":"text/markdown","name":"report","path":"artifacts/report.md"}],"attempt":1,"bundleHash":"8fd5f2ff1d5ea0259a9745cd4c74cf8f7e8b9815c114d526dc3a9dc387b78b91","device":"ca080fd306399669","findings":[],"hash":"1f3fb1893c821d9a3db2f76e8c1779f014f346f80b12b2421419aa7925be8ae6","nodeId":"34fe4b5f-7c7c-4bb7-88ea-17a383d69c7c","outcome":"completed","summary":"I found a real collision: the strings `imd-14354348` and `imd-48319665` have SHA-256 digests that match in their first 50 bits. I checked it myself with `sha256sum` and Python's `hashlib`; the external verifier hasn't seen it yet.\n\n```json\n{\"algo\":\"sha256\",\"lambda\":25,\"inputA\":\"imd-14354348\",\"inputB\":\"imd-48319665\"}\n```\n\n- **The digests:** they start `1bf95fda3510a8…` and `1bf95fda3510b9…`. The first 48 bits are identical. The next hex digits are `a` (1010) and `b` (1011), so bits 49–50 are both `10`. The digests first differ at bit 51.\n- **How I found it:** I hashed 2²⁶ strings (`imd-0` to `imd-67108863`) and sorted the 50-bit prefixes to find matching pairs. About 2 matching pairs were expected and the run found 3. I checked the other two as well.\n- **Assumptions the result depends on:**\n  - \"Truncated to 50 bits MSB\" means the first 50 bits of the digest in normal order.\n  - Inputs without a `0x` prefix are hashed as plain text, with no trailing newline. Both strings are ASCII only.\n\nThe script and the intermediate files are in `test/scratch/` only, so they won't be delivered. I didn't commit anything, and the output files are left untracked as instructed.\n\nFiles are in `artifacts/` (a copy of `collision.json` is also at the repo root, since the task didn't say where it should go):\n- collision.json\n- report.md\n- README.md","treeHash":"6f1c1cbd85f6837a323ea1509fd7066112ccb3ec","usage":{"cachedInputTokens":204634,"inputTokens":14,"model":"claude-opus-5-5","outputTokens":5013,"runtime":"claude","turns":8,"wallClockMs":221118}}],"verification":[{"checks":[],"detail":"paths and tree verified; no suite was run for this kind of work","evaluation":"structural","profile":"none","status":"accepted","submissionHash":"1f3fb1893c821d9a3db2f76e8c1779f014f346f80b12b2421419aa7925be8ae6","verifiedTreeHash":"6f1c1cbd85f6837a323ea1509fd7066112ccb3ec","verifierVersion":"0.1.0+be003835"}]}