{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:7A3OQSA6D2XIVFODBHN755X34H","short_pith_number":"pith:7A3OQSA6","canonical_record":{"source":{"id":"1812.11735","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2018-12-31T09:37:36Z","cross_cats_sorted":["cs.MM"],"title_canon_sha256":"21b252fcf1ea908020aa29012a514769053a6a92dcd0ecbde81865b1827031ec","abstract_canon_sha256":"d3eaa8cda5afe644b1ab05bd5359c3acbea8565b804b972fa17701f101df267e"},"schema_version":"1.0"},"canonical_sha256":"f836e8481e1eae8a95c309dbfef6fbe1cd08426da4e356098b93d7a513ddd280","source":{"kind":"arxiv","id":"1812.11735","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.11735","created_at":"2026-05-17T23:44:37Z"},{"alias_kind":"arxiv_version","alias_value":"1812.11735v2","created_at":"2026-05-17T23:44:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.11735","created_at":"2026-05-17T23:44:37Z"},{"alias_kind":"pith_short_12","alias_value":"7A3OQSA6D2XI","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7A3OQSA6D2XIVFOD","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7A3OQSA6","created_at":"2026-05-18T12:32:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:7A3OQSA6D2XIVFODBHN755X34H","target":"record","payload":{"canonical_record":{"source":{"id":"1812.11735","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2018-12-31T09:37:36Z","cross_cats_sorted":["cs.MM"],"title_canon_sha256":"21b252fcf1ea908020aa29012a514769053a6a92dcd0ecbde81865b1827031ec","abstract_canon_sha256":"d3eaa8cda5afe644b1ab05bd5359c3acbea8565b804b972fa17701f101df267e"},"schema_version":"1.0"},"canonical_sha256":"f836e8481e1eae8a95c309dbfef6fbe1cd08426da4e356098b93d7a513ddd280","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:44:37.820422Z","signature_b64":"kQxRcZzCwCfqtyyXUekGvipA+R3gcqw3cbr1jbVtmdozyw8SQokADXRgPp17LD/+0ks+4PQodZTAEy0zmvwXCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f836e8481e1eae8a95c309dbfef6fbe1cd08426da4e356098b93d7a513ddd280","last_reissued_at":"2026-05-17T23:44:37.819959Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:44:37.819959Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.11735","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":"2026-05-17T23:44:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zop1Flvnqp7Xp4lRHsDV+cUfkSt31s1JX+cOFXyC5dRQCJu/0WIIXExO7Hvclza9neA1A4qELgPcLT39ePs0DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T05:24:48.632780Z"},"content_sha256":"28024fbbc559f8ef4b2b88662aeb39edec0fd7c5c775127fc9465de24a57f2c8","schema_version":"1.0","event_id":"sha256:28024fbbc559f8ef4b2b88662aeb39edec0fd7c5c775127fc9465de24a57f2c8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:7A3OQSA6D2XIVFODBHN755X34H","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Security analysis of a self-embedding fragile image watermark scheme","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.MM"],"primary_cat":"cs.CR","authors_text":"Feng Yu, Shihong Wang, Xiaohong Zhao, Xinhui Gong","submitted_at":"2018-12-31T09:37:36Z","abstract_excerpt":"Recently, a self-embedding fragile watermark scheme based on reference-bits interleaving and adaptive selection of embedding mode was proposed. Reference bits are derived from the scrambled MSB bits of a cover image, and then are combined with authentication bits to form the watermark bits for LSB embedding. We find this algorithm has a feature of block independence of embedding watermark such that it is vulnerable to a collage attack. In addition, because the generation of authentication bits via hash function operations is not related to secret keys, we analyze this algorithm by a multiple s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.11735","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":"2026-05-17T23:44:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HRDr+Bqk66AoSEist8zF3qUmrps4mlyKrG0W0zBPR/keltoG224QP6TMmLz9wQnuAqe4b9snTa4GrDS90QDeCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T05:24:48.633387Z"},"content_sha256":"c6886fc77606a0374f672b9f4ab6983e6e36303952198b9fa5a80c591fc29e6e","schema_version":"1.0","event_id":"sha256:c6886fc77606a0374f672b9f4ab6983e6e36303952198b9fa5a80c591fc29e6e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7A3OQSA6D2XIVFODBHN755X34H/bundle.json","state_url":"https://pith.science/pith/7A3OQSA6D2XIVFODBHN755X34H/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7A3OQSA6D2XIVFODBHN755X34H/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":"2026-05-25T05:24:48Z","links":{"resolver":"https://pith.science/pith/7A3OQSA6D2XIVFODBHN755X34H","bundle":"https://pith.science/pith/7A3OQSA6D2XIVFODBHN755X34H/bundle.json","state":"https://pith.science/pith/7A3OQSA6D2XIVFODBHN755X34H/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7A3OQSA6D2XIVFODBHN755X34H/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:7A3OQSA6D2XIVFODBHN755X34H","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":"d3eaa8cda5afe644b1ab05bd5359c3acbea8565b804b972fa17701f101df267e","cross_cats_sorted":["cs.MM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2018-12-31T09:37:36Z","title_canon_sha256":"21b252fcf1ea908020aa29012a514769053a6a92dcd0ecbde81865b1827031ec"},"schema_version":"1.0","source":{"id":"1812.11735","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.11735","created_at":"2026-05-17T23:44:37Z"},{"alias_kind":"arxiv_version","alias_value":"1812.11735v2","created_at":"2026-05-17T23:44:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.11735","created_at":"2026-05-17T23:44:37Z"},{"alias_kind":"pith_short_12","alias_value":"7A3OQSA6D2XI","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7A3OQSA6D2XIVFOD","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7A3OQSA6","created_at":"2026-05-18T12:32:11Z"}],"graph_snapshots":[{"event_id":"sha256:c6886fc77606a0374f672b9f4ab6983e6e36303952198b9fa5a80c591fc29e6e","target":"graph","created_at":"2026-05-17T23:44:37Z","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":"Recently, a self-embedding fragile watermark scheme based on reference-bits interleaving and adaptive selection of embedding mode was proposed. Reference bits are derived from the scrambled MSB bits of a cover image, and then are combined with authentication bits to form the watermark bits for LSB embedding. We find this algorithm has a feature of block independence of embedding watermark such that it is vulnerable to a collage attack. In addition, because the generation of authentication bits via hash function operations is not related to secret keys, we analyze this algorithm by a multiple s","authors_text":"Feng Yu, Shihong Wang, Xiaohong Zhao, Xinhui Gong","cross_cats":["cs.MM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2018-12-31T09:37:36Z","title":"Security analysis of a self-embedding fragile image watermark scheme"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.11735","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":"sha256:28024fbbc559f8ef4b2b88662aeb39edec0fd7c5c775127fc9465de24a57f2c8","target":"record","created_at":"2026-05-17T23:44:37Z","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":"d3eaa8cda5afe644b1ab05bd5359c3acbea8565b804b972fa17701f101df267e","cross_cats_sorted":["cs.MM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2018-12-31T09:37:36Z","title_canon_sha256":"21b252fcf1ea908020aa29012a514769053a6a92dcd0ecbde81865b1827031ec"},"schema_version":"1.0","source":{"id":"1812.11735","kind":"arxiv","version":2}},"canonical_sha256":"f836e8481e1eae8a95c309dbfef6fbe1cd08426da4e356098b93d7a513ddd280","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f836e8481e1eae8a95c309dbfef6fbe1cd08426da4e356098b93d7a513ddd280","first_computed_at":"2026-05-17T23:44:37.819959Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:44:37.819959Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kQxRcZzCwCfqtyyXUekGvipA+R3gcqw3cbr1jbVtmdozyw8SQokADXRgPp17LD/+0ks+4PQodZTAEy0zmvwXCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:44:37.820422Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.11735","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:28024fbbc559f8ef4b2b88662aeb39edec0fd7c5c775127fc9465de24a57f2c8","sha256:c6886fc77606a0374f672b9f4ab6983e6e36303952198b9fa5a80c591fc29e6e"],"state_sha256":"d7e09c58435f6e1a3433cac0c61118c59ac8a5a709856601214aea82740eab43"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U1kKYyl1dIzbyjpW3DiPKL/CDB6KIXHRxetkwMi7Ey0dZ8q9u6Ge3aY7o/a6TlWQ3pcWyz1fGW91N2DCRlwMDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T05:24:48.636632Z","bundle_sha256":"e067b955d64d11a6dc489203db6f909b8b90f5c204094aa968f07370a155d79b"}}