{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:WC7KMLK454BJUY3TKDLCOTIOSH","short_pith_number":"pith:WC7KMLK4","canonical_record":{"source":{"id":"1708.07150","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2017-08-23T18:57:29Z","cross_cats_sorted":[],"title_canon_sha256":"757dee1058d3126d951f8a82c6a95c9e092568a22321de7a9a9bc0e65de8feb2","abstract_canon_sha256":"6073d3fa024f5fd7b059f90175b0f64f4a5be862946f574f4f6c43c819b349ab"},"schema_version":"1.0"},"canonical_sha256":"b0bea62d5cef029a637350d6274d0e91cdbdacc5e51f636f2ef611551e90e421","source":{"kind":"arxiv","id":"1708.07150","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.07150","created_at":"2026-05-18T00:32:00Z"},{"alias_kind":"arxiv_version","alias_value":"1708.07150v2","created_at":"2026-05-18T00:32:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.07150","created_at":"2026-05-18T00:32:00Z"},{"alias_kind":"pith_short_12","alias_value":"WC7KMLK454BJ","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_16","alias_value":"WC7KMLK454BJUY3T","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_8","alias_value":"WC7KMLK4","created_at":"2026-05-18T12:31:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:WC7KMLK454BJUY3TKDLCOTIOSH","target":"record","payload":{"canonical_record":{"source":{"id":"1708.07150","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2017-08-23T18:57:29Z","cross_cats_sorted":[],"title_canon_sha256":"757dee1058d3126d951f8a82c6a95c9e092568a22321de7a9a9bc0e65de8feb2","abstract_canon_sha256":"6073d3fa024f5fd7b059f90175b0f64f4a5be862946f574f4f6c43c819b349ab"},"schema_version":"1.0"},"canonical_sha256":"b0bea62d5cef029a637350d6274d0e91cdbdacc5e51f636f2ef611551e90e421","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:32:00.950734Z","signature_b64":"HJA0fFrU+HS7gbHeOxIpaRLuZLeyTPBDbinX7k0D66w1nDOUJMB6GPqV1ZW0er3bvU+rtY3/WxNYEo+giVtQDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b0bea62d5cef029a637350d6274d0e91cdbdacc5e51f636f2ef611551e90e421","last_reissued_at":"2026-05-18T00:32:00.950251Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:32:00.950251Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1708.07150","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:32:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Pa7JN1uPRJCS8MtXGpDCPKe6YrZ9SDGP8riBle63IPBmahYLArHoosMA+l+nsG19KPz2JguukGNyHoAYwRFpBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T05:09:09.216668Z"},"content_sha256":"4a20a317355b52d82e8c7c436a368d70e40fd57b712b40c8c5d57657385971bf","schema_version":"1.0","event_id":"sha256:4a20a317355b52d82e8c7c436a368d70e40fd57b712b40c8c5d57657385971bf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:WC7KMLK454BJUY3TKDLCOTIOSH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Threshold-based Obfuscated Keys with Quantifiable Security against Invasive Readout","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CR","authors_text":"Daniel Holcomb, Shahrzad Keshavarz","submitted_at":"2017-08-23T18:57:29Z","abstract_excerpt":"Advances in reverse engineering make it challenging to deploy any on-chip information in a way that is hidden from a determined attacker. A variety of techniques have been proposed for design obfuscation including look-alike cells in which functionality is determined by hard to observe mechanisms including dummy vias or transistor threshold voltages. Threshold-based obfuscation is especially promising because threshold voltages cannot be observed optically and require more sophisticated measurements by the attacker. In this work, we demonstrate the effectiveness of a methodology that applies t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.07150","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:32:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HmNUhaGZSjMFD0xJNZezrlAtS1UY/3/+2VD//k+oEpuADLpIE9fNdtJkpTtJiNNrgQNTT6aW+ZbTzjWS5nfHCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T05:09:09.217005Z"},"content_sha256":"09b24639d157089d335b7862643a74772c0661befe020967d050440e92e70e16","schema_version":"1.0","event_id":"sha256:09b24639d157089d335b7862643a74772c0661befe020967d050440e92e70e16"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WC7KMLK454BJUY3TKDLCOTIOSH/bundle.json","state_url":"https://pith.science/pith/WC7KMLK454BJUY3TKDLCOTIOSH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WC7KMLK454BJUY3TKDLCOTIOSH/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-02T05:09:09Z","links":{"resolver":"https://pith.science/pith/WC7KMLK454BJUY3TKDLCOTIOSH","bundle":"https://pith.science/pith/WC7KMLK454BJUY3TKDLCOTIOSH/bundle.json","state":"https://pith.science/pith/WC7KMLK454BJUY3TKDLCOTIOSH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WC7KMLK454BJUY3TKDLCOTIOSH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:WC7KMLK454BJUY3TKDLCOTIOSH","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"6073d3fa024f5fd7b059f90175b0f64f4a5be862946f574f4f6c43c819b349ab","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2017-08-23T18:57:29Z","title_canon_sha256":"757dee1058d3126d951f8a82c6a95c9e092568a22321de7a9a9bc0e65de8feb2"},"schema_version":"1.0","source":{"id":"1708.07150","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.07150","created_at":"2026-05-18T00:32:00Z"},{"alias_kind":"arxiv_version","alias_value":"1708.07150v2","created_at":"2026-05-18T00:32:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.07150","created_at":"2026-05-18T00:32:00Z"},{"alias_kind":"pith_short_12","alias_value":"WC7KMLK454BJ","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_16","alias_value":"WC7KMLK454BJUY3T","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_8","alias_value":"WC7KMLK4","created_at":"2026-05-18T12:31:53Z"}],"graph_snapshots":[{"event_id":"sha256:09b24639d157089d335b7862643a74772c0661befe020967d050440e92e70e16","target":"graph","created_at":"2026-05-18T00:32:00Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Advances in reverse engineering make it challenging to deploy any on-chip information in a way that is hidden from a determined attacker. A variety of techniques have been proposed for design obfuscation including look-alike cells in which functionality is determined by hard to observe mechanisms including dummy vias or transistor threshold voltages. Threshold-based obfuscation is especially promising because threshold voltages cannot be observed optically and require more sophisticated measurements by the attacker. In this work, we demonstrate the effectiveness of a methodology that applies t","authors_text":"Daniel Holcomb, Shahrzad Keshavarz","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2017-08-23T18:57:29Z","title":"Threshold-based Obfuscated Keys with Quantifiable Security against Invasive Readout"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.07150","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:4a20a317355b52d82e8c7c436a368d70e40fd57b712b40c8c5d57657385971bf","target":"record","created_at":"2026-05-18T00:32:00Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"6073d3fa024f5fd7b059f90175b0f64f4a5be862946f574f4f6c43c819b349ab","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2017-08-23T18:57:29Z","title_canon_sha256":"757dee1058d3126d951f8a82c6a95c9e092568a22321de7a9a9bc0e65de8feb2"},"schema_version":"1.0","source":{"id":"1708.07150","kind":"arxiv","version":2}},"canonical_sha256":"b0bea62d5cef029a637350d6274d0e91cdbdacc5e51f636f2ef611551e90e421","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b0bea62d5cef029a637350d6274d0e91cdbdacc5e51f636f2ef611551e90e421","first_computed_at":"2026-05-18T00:32:00.950251Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:32:00.950251Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HJA0fFrU+HS7gbHeOxIpaRLuZLeyTPBDbinX7k0D66w1nDOUJMB6GPqV1ZW0er3bvU+rtY3/WxNYEo+giVtQDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:32:00.950734Z","signed_message":"canonical_sha256_bytes"},"source_id":"1708.07150","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4a20a317355b52d82e8c7c436a368d70e40fd57b712b40c8c5d57657385971bf","sha256:09b24639d157089d335b7862643a74772c0661befe020967d050440e92e70e16"],"state_sha256":"3b25aac1e70d5588d1d03fbb6f2a33daa80fff0206a1516e2b5a1f5dd5bd4d84"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aViO4LBGMGnkK8ozQROImtkGSyLCSjGQGAhhPlZh3SlUYh+HyZdaukQuUjKDvbvhyISt/y4CCBtVb16GChRwBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T05:09:09.218922Z","bundle_sha256":"77c10e4f3918cf9a0d0005ca1cdb392a7863169af16bfde31fca50a597380c58"}}