{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:BFJ6RWHOWZHRHRVIIJWWY2EV7Z","short_pith_number":"pith:BFJ6RWHO","canonical_record":{"source":{"id":"1304.2463","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-04-09T06:25:05Z","cross_cats_sorted":[],"title_canon_sha256":"d4e24b574730ac0d8f91f07e2c1d8d3887f69aa6ace59ead75435e4eaeda8e65","abstract_canon_sha256":"5897b0e6200d59d751d1aef4075b63788aa7d988a91c54a32da974b23aae7e8b"},"schema_version":"1.0"},"canonical_sha256":"0953e8d8eeb64f13c6a8426d6c6895fe7b1b25605bf33bebe9e55821dcccf46f","source":{"kind":"arxiv","id":"1304.2463","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.2463","created_at":"2026-05-18T03:11:35Z"},{"alias_kind":"arxiv_version","alias_value":"1304.2463v1","created_at":"2026-05-18T03:11:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.2463","created_at":"2026-05-18T03:11:35Z"},{"alias_kind":"pith_short_12","alias_value":"BFJ6RWHOWZHR","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"BFJ6RWHOWZHRHRVI","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"BFJ6RWHO","created_at":"2026-05-18T12:27:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:BFJ6RWHOWZHRHRVIIJWWY2EV7Z","target":"record","payload":{"canonical_record":{"source":{"id":"1304.2463","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-04-09T06:25:05Z","cross_cats_sorted":[],"title_canon_sha256":"d4e24b574730ac0d8f91f07e2c1d8d3887f69aa6ace59ead75435e4eaeda8e65","abstract_canon_sha256":"5897b0e6200d59d751d1aef4075b63788aa7d988a91c54a32da974b23aae7e8b"},"schema_version":"1.0"},"canonical_sha256":"0953e8d8eeb64f13c6a8426d6c6895fe7b1b25605bf33bebe9e55821dcccf46f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:11:35.805048Z","signature_b64":"y3GQsSxDNxHoEMhSQF0FDxySyH5CRCM/ptWo2QJ54zHB18pRT/FsZBX15aJydTtaYqIutFlGaJMxH+sj/exaAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0953e8d8eeb64f13c6a8426d6c6895fe7b1b25605bf33bebe9e55821dcccf46f","last_reissued_at":"2026-05-18T03:11:35.804357Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:11:35.804357Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1304.2463","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:11:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nvAFBZY2HoM5tjwpwoVzN5/glVxV1zbUfHsYUjaO8zwcnoXUGZUyG5TDawtypYJJC8NGyWLXWXqubbvgCgmoCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T03:30:00.388187Z"},"content_sha256":"11dd74f920dacdb50584411976d3c98369b54797ff287e236493409d22ac5d79","schema_version":"1.0","event_id":"sha256:11dd74f920dacdb50584411976d3c98369b54797ff287e236493409d22ac5d79"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:BFJ6RWHOWZHRHRVIIJWWY2EV7Z","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Real-world two-photon interference and proof-of-principle quantum key distribution immune to detector attacks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Allison Rubenok, Itzel Lucio-Martinez, Joshua A. Slater, Philip Chan, Wolfgang Tittel","submitted_at":"2013-04-09T06:25:05Z","abstract_excerpt":"Several vulnerabilities of single photon detectors have recently been exploited to compromise the security of quantum key distribution (QKD) systems. In this letter we report the first proof-of-principle implementation of a new quantum key distribution protocol that is immune to any such attack. More precisely, we demonstrated this new approach to QKD in the laboratory over more than 80 km of spooled fiber, as well as across different locations within the city of Calgary. The robustness of our fibre-based implementation, together with the enhanced level of security offered by the protocol, con"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.2463","kind":"arxiv","version":1},"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":"2026-05-18T03:11:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nOcYuzoUY/dHLdcitsDuYdxHZfRAcG98bQTA7yj5vZzIK7PqhCI7zHAkMxDCUxDsJPkF2dr7xdxPiLu75YhbDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T03:30:00.388545Z"},"content_sha256":"383e7ed1ff1b52c48077bc2f3a7395ecb88976b3a3c2a31d47ca4e9dc272aadb","schema_version":"1.0","event_id":"sha256:383e7ed1ff1b52c48077bc2f3a7395ecb88976b3a3c2a31d47ca4e9dc272aadb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BFJ6RWHOWZHRHRVIIJWWY2EV7Z/bundle.json","state_url":"https://pith.science/pith/BFJ6RWHOWZHRHRVIIJWWY2EV7Z/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BFJ6RWHOWZHRHRVIIJWWY2EV7Z/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":"2026-06-04T03:30:00Z","links":{"resolver":"https://pith.science/pith/BFJ6RWHOWZHRHRVIIJWWY2EV7Z","bundle":"https://pith.science/pith/BFJ6RWHOWZHRHRVIIJWWY2EV7Z/bundle.json","state":"https://pith.science/pith/BFJ6RWHOWZHRHRVIIJWWY2EV7Z/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BFJ6RWHOWZHRHRVIIJWWY2EV7Z/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:BFJ6RWHOWZHRHRVIIJWWY2EV7Z","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":"5897b0e6200d59d751d1aef4075b63788aa7d988a91c54a32da974b23aae7e8b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-04-09T06:25:05Z","title_canon_sha256":"d4e24b574730ac0d8f91f07e2c1d8d3887f69aa6ace59ead75435e4eaeda8e65"},"schema_version":"1.0","source":{"id":"1304.2463","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.2463","created_at":"2026-05-18T03:11:35Z"},{"alias_kind":"arxiv_version","alias_value":"1304.2463v1","created_at":"2026-05-18T03:11:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.2463","created_at":"2026-05-18T03:11:35Z"},{"alias_kind":"pith_short_12","alias_value":"BFJ6RWHOWZHR","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"BFJ6RWHOWZHRHRVI","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"BFJ6RWHO","created_at":"2026-05-18T12:27:38Z"}],"graph_snapshots":[{"event_id":"sha256:383e7ed1ff1b52c48077bc2f3a7395ecb88976b3a3c2a31d47ca4e9dc272aadb","target":"graph","created_at":"2026-05-18T03:11:35Z","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":"Several vulnerabilities of single photon detectors have recently been exploited to compromise the security of quantum key distribution (QKD) systems. In this letter we report the first proof-of-principle implementation of a new quantum key distribution protocol that is immune to any such attack. More precisely, we demonstrated this new approach to QKD in the laboratory over more than 80 km of spooled fiber, as well as across different locations within the city of Calgary. The robustness of our fibre-based implementation, together with the enhanced level of security offered by the protocol, con","authors_text":"Allison Rubenok, Itzel Lucio-Martinez, Joshua A. Slater, Philip Chan, Wolfgang Tittel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-04-09T06:25:05Z","title":"Real-world two-photon interference and proof-of-principle quantum key distribution immune to detector attacks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.2463","kind":"arxiv","version":1},"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":"sha256:11dd74f920dacdb50584411976d3c98369b54797ff287e236493409d22ac5d79","target":"record","created_at":"2026-05-18T03:11:35Z","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":"5897b0e6200d59d751d1aef4075b63788aa7d988a91c54a32da974b23aae7e8b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-04-09T06:25:05Z","title_canon_sha256":"d4e24b574730ac0d8f91f07e2c1d8d3887f69aa6ace59ead75435e4eaeda8e65"},"schema_version":"1.0","source":{"id":"1304.2463","kind":"arxiv","version":1}},"canonical_sha256":"0953e8d8eeb64f13c6a8426d6c6895fe7b1b25605bf33bebe9e55821dcccf46f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0953e8d8eeb64f13c6a8426d6c6895fe7b1b25605bf33bebe9e55821dcccf46f","first_computed_at":"2026-05-18T03:11:35.804357Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:11:35.804357Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"y3GQsSxDNxHoEMhSQF0FDxySyH5CRCM/ptWo2QJ54zHB18pRT/FsZBX15aJydTtaYqIutFlGaJMxH+sj/exaAA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:11:35.805048Z","signed_message":"canonical_sha256_bytes"},"source_id":"1304.2463","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:11dd74f920dacdb50584411976d3c98369b54797ff287e236493409d22ac5d79","sha256:383e7ed1ff1b52c48077bc2f3a7395ecb88976b3a3c2a31d47ca4e9dc272aadb"],"state_sha256":"a1637d4c2d73c79b69741f958a3566df9ec0e266700e4e208dc03e0f71f09af8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EjuQ5bF0dWHhggOHdFDXJYvdOr+nSRlGFyf/3/bMzTJEWgmHCjou8oCY0hDGwdfgizpjq2YXMRSCqR6VzzAIAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T03:30:00.390536Z","bundle_sha256":"543fda165f01a710604b5b7fae81e4d444cea998cf4ab074dae828c495b36677"}}