{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:ZEN7VY4PEAUB3BUTKFKRHHLI2B","short_pith_number":"pith:ZEN7VY4P","canonical_record":{"source":{"id":"1707.06279","kind":"arxiv","version":6},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2017-07-19T20:13:08Z","cross_cats_sorted":[],"title_canon_sha256":"ca3a7c46b3fb3af90d461b414ee0f02f5a663faa1738815e7dfab16bb71b417a","abstract_canon_sha256":"e8f984ada5bea9791ce078b6599988b47a0ed470e5bbf16c50a76eab110af771"},"schema_version":"1.0"},"canonical_sha256":"c91bfae38f20281d86935155139d68d0415123af75fb0e8c3a1de021c5db69fc","source":{"kind":"arxiv","id":"1707.06279","version":6},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.06279","created_at":"2026-05-18T00:03:32Z"},{"alias_kind":"arxiv_version","alias_value":"1707.06279v6","created_at":"2026-05-18T00:03:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.06279","created_at":"2026-05-18T00:03:32Z"},{"alias_kind":"pith_short_12","alias_value":"ZEN7VY4PEAUB","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"ZEN7VY4PEAUB3BUT","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"ZEN7VY4P","created_at":"2026-05-18T12:31:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:ZEN7VY4PEAUB3BUTKFKRHHLI2B","target":"record","payload":{"canonical_record":{"source":{"id":"1707.06279","kind":"arxiv","version":6},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2017-07-19T20:13:08Z","cross_cats_sorted":[],"title_canon_sha256":"ca3a7c46b3fb3af90d461b414ee0f02f5a663faa1738815e7dfab16bb71b417a","abstract_canon_sha256":"e8f984ada5bea9791ce078b6599988b47a0ed470e5bbf16c50a76eab110af771"},"schema_version":"1.0"},"canonical_sha256":"c91bfae38f20281d86935155139d68d0415123af75fb0e8c3a1de021c5db69fc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:03:32.567516Z","signature_b64":"fHCjzX0M802vknIWtbIsmOS1ukgsiBXqAgyihKNCIqB1QkSGVa4T+edNEAe2TDkoEo/kDaJjf8u7udhVEkxNBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c91bfae38f20281d86935155139d68d0415123af75fb0e8c3a1de021c5db69fc","last_reissued_at":"2026-05-18T00:03:32.566802Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:03:32.566802Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1707.06279","source_version":6,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:03:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fgKAafYvPn9PhgTz5n+pg2ghd6RFlS/ESKoqpYl51QKjFi/zGhzryp9IMM96rNNihdq1YTBazOJCykTjPkYEBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T04:17:46.141161Z"},"content_sha256":"9d8d98f6060fdc99ce5d0d1772d78c36626b25640237a246ff00b06ce46b717f","schema_version":"1.0","event_id":"sha256:9d8d98f6060fdc99ce5d0d1772d78c36626b25640237a246ff00b06ce46b717f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:ZEN7VY4PEAUB3BUTKFKRHHLI2B","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"ClaimChain: Improving the Security and Privacy of In-band Key Distribution for Messaging","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CR","authors_text":"Bogdan Kulynych, Carmela Troncoso, George Danezis, Marios Isaakidis, Wouter Lueks","submitted_at":"2017-07-19T20:13:08Z","abstract_excerpt":"The social demand for email end-to-end encryption is barely supported by mainstream service providers. Autocrypt is a new community-driven open specification for e-mail encryption that attempts to respond to this demand. In Autocrypt the encryption keys are attached directly to messages, and thus the encryption can be implemented by email clients without any collaboration of the providers. The decentralized nature of this in-band key distribution, however, makes it prone to man-in-the-middle attacks and can leak the social graph of users. To address this problem we introduce ClaimChain, a cryp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.06279","kind":"arxiv","version":6},"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":"2026-05-18T00:03:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M+zTHMoZEtmb0WTFjRju2nTmsGclEohMKgqc4riO2TrCWBayzI53vPrZnANP3bpbmvGFTuom5miREDR2anLMBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T04:17:46.141992Z"},"content_sha256":"48db6afc2038abb377210f77d614fa23defe69ca14d53cd0fc4d759364dbe1ee","schema_version":"1.0","event_id":"sha256:48db6afc2038abb377210f77d614fa23defe69ca14d53cd0fc4d759364dbe1ee"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZEN7VY4PEAUB3BUTKFKRHHLI2B/bundle.json","state_url":"https://pith.science/pith/ZEN7VY4PEAUB3BUTKFKRHHLI2B/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZEN7VY4PEAUB3BUTKFKRHHLI2B/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":"2026-05-30T04:17:46Z","links":{"resolver":"https://pith.science/pith/ZEN7VY4PEAUB3BUTKFKRHHLI2B","bundle":"https://pith.science/pith/ZEN7VY4PEAUB3BUTKFKRHHLI2B/bundle.json","state":"https://pith.science/pith/ZEN7VY4PEAUB3BUTKFKRHHLI2B/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZEN7VY4PEAUB3BUTKFKRHHLI2B/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:ZEN7VY4PEAUB3BUTKFKRHHLI2B","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":"e8f984ada5bea9791ce078b6599988b47a0ed470e5bbf16c50a76eab110af771","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2017-07-19T20:13:08Z","title_canon_sha256":"ca3a7c46b3fb3af90d461b414ee0f02f5a663faa1738815e7dfab16bb71b417a"},"schema_version":"1.0","source":{"id":"1707.06279","kind":"arxiv","version":6}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.06279","created_at":"2026-05-18T00:03:32Z"},{"alias_kind":"arxiv_version","alias_value":"1707.06279v6","created_at":"2026-05-18T00:03:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.06279","created_at":"2026-05-18T00:03:32Z"},{"alias_kind":"pith_short_12","alias_value":"ZEN7VY4PEAUB","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"ZEN7VY4PEAUB3BUT","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"ZEN7VY4P","created_at":"2026-05-18T12:31:59Z"}],"graph_snapshots":[{"event_id":"sha256:48db6afc2038abb377210f77d614fa23defe69ca14d53cd0fc4d759364dbe1ee","target":"graph","created_at":"2026-05-18T00:03:32Z","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":"The social demand for email end-to-end encryption is barely supported by mainstream service providers. Autocrypt is a new community-driven open specification for e-mail encryption that attempts to respond to this demand. In Autocrypt the encryption keys are attached directly to messages, and thus the encryption can be implemented by email clients without any collaboration of the providers. The decentralized nature of this in-band key distribution, however, makes it prone to man-in-the-middle attacks and can leak the social graph of users. To address this problem we introduce ClaimChain, a cryp","authors_text":"Bogdan Kulynych, Carmela Troncoso, George Danezis, Marios Isaakidis, Wouter Lueks","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2017-07-19T20:13:08Z","title":"ClaimChain: Improving the Security and Privacy of In-band Key Distribution for Messaging"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.06279","kind":"arxiv","version":6},"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":"sha256:9d8d98f6060fdc99ce5d0d1772d78c36626b25640237a246ff00b06ce46b717f","target":"record","created_at":"2026-05-18T00:03:32Z","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":"e8f984ada5bea9791ce078b6599988b47a0ed470e5bbf16c50a76eab110af771","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2017-07-19T20:13:08Z","title_canon_sha256":"ca3a7c46b3fb3af90d461b414ee0f02f5a663faa1738815e7dfab16bb71b417a"},"schema_version":"1.0","source":{"id":"1707.06279","kind":"arxiv","version":6}},"canonical_sha256":"c91bfae38f20281d86935155139d68d0415123af75fb0e8c3a1de021c5db69fc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c91bfae38f20281d86935155139d68d0415123af75fb0e8c3a1de021c5db69fc","first_computed_at":"2026-05-18T00:03:32.566802Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:03:32.566802Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fHCjzX0M802vknIWtbIsmOS1ukgsiBXqAgyihKNCIqB1QkSGVa4T+edNEAe2TDkoEo/kDaJjf8u7udhVEkxNBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:03:32.567516Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.06279","source_kind":"arxiv","source_version":6}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9d8d98f6060fdc99ce5d0d1772d78c36626b25640237a246ff00b06ce46b717f","sha256:48db6afc2038abb377210f77d614fa23defe69ca14d53cd0fc4d759364dbe1ee"],"state_sha256":"1aa46f6299ae99c00bc1c253cb5cd4be6221444d7068edcd31bda7d485f3c4e6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/2YEatSYCF/MhtGzKO8N++2mwUrSZqEj3YEy3/MZBWxGlsx2aB9+HXSropWDNkur8Qt3VtUNkkSSqBGe0BSvDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T04:17:46.146400Z","bundle_sha256":"18bfa9edda1d06e949f236891e6115431d19783ad4569dc05d9146fc03178f30"}}