{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:B65EAP5A2XE4NXQW77MLHWNMCW","short_pith_number":"pith:B65EAP5A","canonical_record":{"source":{"id":"1209.0435","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-09-03T19:08:28Z","cross_cats_sorted":["cs.CR"],"title_canon_sha256":"508f57a8035a421192feaa083b1aeed8b65187a19e63fd1519472ace5c7dafcc","abstract_canon_sha256":"7b2a323d18745ee3bdfb2da05a8261368b5b2993aaa7b231f2bf9224994c4eef"},"schema_version":"1.0"},"canonical_sha256":"0fba403fa0d5c9c6de16ffd8b3d9ac15bcf43989b0e8a5ed286c7e5de9cf2e77","source":{"kind":"arxiv","id":"1209.0435","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.0435","created_at":"2026-05-18T03:37:40Z"},{"alias_kind":"arxiv_version","alias_value":"1209.0435v2","created_at":"2026-05-18T03:37:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.0435","created_at":"2026-05-18T03:37:40Z"},{"alias_kind":"pith_short_12","alias_value":"B65EAP5A2XE4","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"B65EAP5A2XE4NXQW","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"B65EAP5A","created_at":"2026-05-18T12:26:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:B65EAP5A2XE4NXQW77MLHWNMCW","target":"record","payload":{"canonical_record":{"source":{"id":"1209.0435","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-09-03T19:08:28Z","cross_cats_sorted":["cs.CR"],"title_canon_sha256":"508f57a8035a421192feaa083b1aeed8b65187a19e63fd1519472ace5c7dafcc","abstract_canon_sha256":"7b2a323d18745ee3bdfb2da05a8261368b5b2993aaa7b231f2bf9224994c4eef"},"schema_version":"1.0"},"canonical_sha256":"0fba403fa0d5c9c6de16ffd8b3d9ac15bcf43989b0e8a5ed286c7e5de9cf2e77","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:37:40.923254Z","signature_b64":"OcQVavLh/RNMupsSp2LWtlrBTdwIthL2mC2+KYuxbhjIXvFxlsV/SBiJqEv59mmqw3+O/Vp1rPK3OcCFkjBVCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0fba403fa0d5c9c6de16ffd8b3d9ac15bcf43989b0e8a5ed286c7e5de9cf2e77","last_reissued_at":"2026-05-18T03:37:40.922772Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:37:40.922772Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1209.0435","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":"2026-05-18T03:37:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KyOZsVKpXe9gkBu5ICEl6fSbYNrlVhc4WArA0yKA/dM7qdjMsNdzJd4JI3c44zSfV1hs/FQ8nagHeulXSf0GBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T11:55:42.159454Z"},"content_sha256":"f8e69fa4aaf506d15d25abf17d67a3bf1bd3173dff0c0df4098526814c960c8b","schema_version":"1.0","event_id":"sha256:f8e69fa4aaf506d15d25abf17d67a3bf1bd3173dff0c0df4098526814c960c8b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:B65EAP5A2XE4NXQW77MLHWNMCW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Unconditionally secure device-independent quantum key distribution with only two devices","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CR"],"primary_cat":"quant-ph","authors_text":"Adrian Kent, Jonathan Barrett, Roger Colbeck","submitted_at":"2012-09-03T19:08:28Z","abstract_excerpt":"Device-independent quantum key distribution is the task of using uncharacterized quantum devices to establish a shared key between two users. If a protocol is secure regardless of the device behaviour, it can be used to generate a shared key even if the supplier of the devices is malicious. To date, all device-independent quantum key distribution protocols that are known to be secure require separate isolated devices for each entangled pair, which is a significant practical limitation. We introduce a protocol that requires Alice and Bob to have only one device each. Although inefficient, our p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.0435","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":"2026-05-18T03:37:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pMYlDq02lzRRf93jGRBGAjMMRT3W7S8QjVjKEcnhCLnrqBIupt4755XZHjV5+MKg799wALOiU+e7iqtIj7GLBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T11:55:42.159799Z"},"content_sha256":"2a33e1cf115858625d3d8eca05815f77b9fc77b423917d1c53de375d88a60c36","schema_version":"1.0","event_id":"sha256:2a33e1cf115858625d3d8eca05815f77b9fc77b423917d1c53de375d88a60c36"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/B65EAP5A2XE4NXQW77MLHWNMCW/bundle.json","state_url":"https://pith.science/pith/B65EAP5A2XE4NXQW77MLHWNMCW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/B65EAP5A2XE4NXQW77MLHWNMCW/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":"2026-05-19T11:55:42Z","links":{"resolver":"https://pith.science/pith/B65EAP5A2XE4NXQW77MLHWNMCW","bundle":"https://pith.science/pith/B65EAP5A2XE4NXQW77MLHWNMCW/bundle.json","state":"https://pith.science/pith/B65EAP5A2XE4NXQW77MLHWNMCW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/B65EAP5A2XE4NXQW77MLHWNMCW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:B65EAP5A2XE4NXQW77MLHWNMCW","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":"7b2a323d18745ee3bdfb2da05a8261368b5b2993aaa7b231f2bf9224994c4eef","cross_cats_sorted":["cs.CR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-09-03T19:08:28Z","title_canon_sha256":"508f57a8035a421192feaa083b1aeed8b65187a19e63fd1519472ace5c7dafcc"},"schema_version":"1.0","source":{"id":"1209.0435","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.0435","created_at":"2026-05-18T03:37:40Z"},{"alias_kind":"arxiv_version","alias_value":"1209.0435v2","created_at":"2026-05-18T03:37:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.0435","created_at":"2026-05-18T03:37:40Z"},{"alias_kind":"pith_short_12","alias_value":"B65EAP5A2XE4","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"B65EAP5A2XE4NXQW","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"B65EAP5A","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:2a33e1cf115858625d3d8eca05815f77b9fc77b423917d1c53de375d88a60c36","target":"graph","created_at":"2026-05-18T03:37:40Z","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":"Device-independent quantum key distribution is the task of using uncharacterized quantum devices to establish a shared key between two users. If a protocol is secure regardless of the device behaviour, it can be used to generate a shared key even if the supplier of the devices is malicious. To date, all device-independent quantum key distribution protocols that are known to be secure require separate isolated devices for each entangled pair, which is a significant practical limitation. We introduce a protocol that requires Alice and Bob to have only one device each. Although inefficient, our p","authors_text":"Adrian Kent, Jonathan Barrett, Roger Colbeck","cross_cats":["cs.CR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-09-03T19:08:28Z","title":"Unconditionally secure device-independent quantum key distribution with only two devices"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.0435","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:f8e69fa4aaf506d15d25abf17d67a3bf1bd3173dff0c0df4098526814c960c8b","target":"record","created_at":"2026-05-18T03:37:40Z","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":"7b2a323d18745ee3bdfb2da05a8261368b5b2993aaa7b231f2bf9224994c4eef","cross_cats_sorted":["cs.CR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-09-03T19:08:28Z","title_canon_sha256":"508f57a8035a421192feaa083b1aeed8b65187a19e63fd1519472ace5c7dafcc"},"schema_version":"1.0","source":{"id":"1209.0435","kind":"arxiv","version":2}},"canonical_sha256":"0fba403fa0d5c9c6de16ffd8b3d9ac15bcf43989b0e8a5ed286c7e5de9cf2e77","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0fba403fa0d5c9c6de16ffd8b3d9ac15bcf43989b0e8a5ed286c7e5de9cf2e77","first_computed_at":"2026-05-18T03:37:40.922772Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:37:40.922772Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OcQVavLh/RNMupsSp2LWtlrBTdwIthL2mC2+KYuxbhjIXvFxlsV/SBiJqEv59mmqw3+O/Vp1rPK3OcCFkjBVCg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:37:40.923254Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.0435","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f8e69fa4aaf506d15d25abf17d67a3bf1bd3173dff0c0df4098526814c960c8b","sha256:2a33e1cf115858625d3d8eca05815f77b9fc77b423917d1c53de375d88a60c36"],"state_sha256":"71eeeeff1dedd54a5242eb9b609a235307210bf5ad4968d4c6b5512c9791ae3d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LomgjnuukGQNZyuLZKGUBmNFikyRyjcWNea+xZ3poeawWzkL1NF1xLU9yUjrbfJWoH9HYL4+mgJG/VKDbGFACw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T11:55:42.161427Z","bundle_sha256":"e4c41cc17ce5349f4744216b70382afb52c38797931f66bb3b4a3d310756d4dd"}}