{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:ETPNHHEAFUP66OXBXMCRUBKLBU","short_pith_number":"pith:ETPNHHEA","canonical_record":{"source":{"id":"2504.20417","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-04-29T04:28:15Z","cross_cats_sorted":[],"title_canon_sha256":"5f7ab5b0314923a3f083a238d79ad47f226a9f96af8d3f2da588d9acd52661fd","abstract_canon_sha256":"7f51a091494367ac647900164e770abd1a263df446abe4b7646a4c33398d5764"},"schema_version":"1.0"},"canonical_sha256":"24ded39c802d1fef3ae1bb051a054b0d22def8fdc5b18cc619ba48aca91e1af5","source":{"kind":"arxiv","id":"2504.20417","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.20417","created_at":"2026-07-05T11:09:46Z"},{"alias_kind":"arxiv_version","alias_value":"2504.20417v3","created_at":"2026-07-05T11:09:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.20417","created_at":"2026-07-05T11:09:46Z"},{"alias_kind":"pith_short_12","alias_value":"ETPNHHEAFUP6","created_at":"2026-07-05T11:09:46Z"},{"alias_kind":"pith_short_16","alias_value":"ETPNHHEAFUP66OXB","created_at":"2026-07-05T11:09:46Z"},{"alias_kind":"pith_short_8","alias_value":"ETPNHHEA","created_at":"2026-07-05T11:09:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:ETPNHHEAFUP66OXBXMCRUBKLBU","target":"record","payload":{"canonical_record":{"source":{"id":"2504.20417","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-04-29T04:28:15Z","cross_cats_sorted":[],"title_canon_sha256":"5f7ab5b0314923a3f083a238d79ad47f226a9f96af8d3f2da588d9acd52661fd","abstract_canon_sha256":"7f51a091494367ac647900164e770abd1a263df446abe4b7646a4c33398d5764"},"schema_version":"1.0"},"canonical_sha256":"24ded39c802d1fef3ae1bb051a054b0d22def8fdc5b18cc619ba48aca91e1af5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:09:46.788378Z","signature_b64":"YRG8w0GVp3FjVTv0hHNhC+GA1jPFWgxmVuh/5wtw46OUB8FCaVZ9Ja7Frgz0VlZN3jZv79m385vT2aS+8JYHCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"24ded39c802d1fef3ae1bb051a054b0d22def8fdc5b18cc619ba48aca91e1af5","last_reissued_at":"2026-07-05T11:09:46.787684Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:09:46.787684Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2504.20417","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:09:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ga3Vp5IqaS3TpjbQNLAV3WKzG/TwXzVu9R4Ed4JvHjru84PsMIpJ1Jk+YtX5YueMsrNhBELGKO28QVaVQXQ8CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T06:34:48.736669Z"},"content_sha256":"a1be1e7b1660e3d8b1044d4efe56706c49ef52d72df4bfd1906c0ce1999bb9c5","schema_version":"1.0","event_id":"sha256:a1be1e7b1660e3d8b1044d4efe56706c49ef52d72df4bfd1906c0ce1999bb9c5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:ETPNHHEAFUP66OXBXMCRUBKLBU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Protocol-level description and self-contained security proof of decoy-state BB84 QKD protocol","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Akihiro Mizutani, Go Kato, Toshihiko Sasaki","submitted_at":"2025-04-29T04:28:15Z","abstract_excerpt":"In this paper, we present a flowchart-based description of the decoy-state BB84 quantum key distribution (QKD) protocol and provide a step-by-step, self-contained information-theoretic security proof for this protocol within the universal composable security framework. As a result, our proof yields a key rate consistent with previous findings. Importantly, unlike all the prior security proofs, our approach offers a fully rigorous and mathematical justification for achieving the key rate with the claimed correctness and secrecy parameters, thereby representing a significant step toward the form"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.20417","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2504.20417/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T11:09:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"31L2pMCzEp8IZFdxHds022r4zqW9Evsthf9kh4NQBFYwTMs4P9JJ6maH6lEOosYRuEOtm6v5ybInhbQLRu42Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T06:34:48.737588Z"},"content_sha256":"e8daed492a67c86c866415d36e2da0a9fefea4f2b559ea7bd54869b4042496ef","schema_version":"1.0","event_id":"sha256:e8daed492a67c86c866415d36e2da0a9fefea4f2b559ea7bd54869b4042496ef"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ETPNHHEAFUP66OXBXMCRUBKLBU/bundle.json","state_url":"https://pith.science/pith/ETPNHHEAFUP66OXBXMCRUBKLBU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ETPNHHEAFUP66OXBXMCRUBKLBU/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":"2026-08-14T06:34:48Z","links":{"resolver":"https://pith.science/pith/ETPNHHEAFUP66OXBXMCRUBKLBU","bundle":"https://pith.science/pith/ETPNHHEAFUP66OXBXMCRUBKLBU/bundle.json","state":"https://pith.science/pith/ETPNHHEAFUP66OXBXMCRUBKLBU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ETPNHHEAFUP66OXBXMCRUBKLBU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:ETPNHHEAFUP66OXBXMCRUBKLBU","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":"7f51a091494367ac647900164e770abd1a263df446abe4b7646a4c33398d5764","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-04-29T04:28:15Z","title_canon_sha256":"5f7ab5b0314923a3f083a238d79ad47f226a9f96af8d3f2da588d9acd52661fd"},"schema_version":"1.0","source":{"id":"2504.20417","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.20417","created_at":"2026-07-05T11:09:46Z"},{"alias_kind":"arxiv_version","alias_value":"2504.20417v3","created_at":"2026-07-05T11:09:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.20417","created_at":"2026-07-05T11:09:46Z"},{"alias_kind":"pith_short_12","alias_value":"ETPNHHEAFUP6","created_at":"2026-07-05T11:09:46Z"},{"alias_kind":"pith_short_16","alias_value":"ETPNHHEAFUP66OXB","created_at":"2026-07-05T11:09:46Z"},{"alias_kind":"pith_short_8","alias_value":"ETPNHHEA","created_at":"2026-07-05T11:09:46Z"}],"graph_snapshots":[{"event_id":"sha256:e8daed492a67c86c866415d36e2da0a9fefea4f2b559ea7bd54869b4042496ef","target":"graph","created_at":"2026-07-05T11:09:46Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2504.20417/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this paper, we present a flowchart-based description of the decoy-state BB84 quantum key distribution (QKD) protocol and provide a step-by-step, self-contained information-theoretic security proof for this protocol within the universal composable security framework. As a result, our proof yields a key rate consistent with previous findings. Importantly, unlike all the prior security proofs, our approach offers a fully rigorous and mathematical justification for achieving the key rate with the claimed correctness and secrecy parameters, thereby representing a significant step toward the form","authors_text":"Akihiro Mizutani, Go Kato, Toshihiko Sasaki","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-04-29T04:28:15Z","title":"Protocol-level description and self-contained security proof of decoy-state BB84 QKD protocol"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.20417","kind":"arxiv","version":3},"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:a1be1e7b1660e3d8b1044d4efe56706c49ef52d72df4bfd1906c0ce1999bb9c5","target":"record","created_at":"2026-07-05T11:09:46Z","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":"7f51a091494367ac647900164e770abd1a263df446abe4b7646a4c33398d5764","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-04-29T04:28:15Z","title_canon_sha256":"5f7ab5b0314923a3f083a238d79ad47f226a9f96af8d3f2da588d9acd52661fd"},"schema_version":"1.0","source":{"id":"2504.20417","kind":"arxiv","version":3}},"canonical_sha256":"24ded39c802d1fef3ae1bb051a054b0d22def8fdc5b18cc619ba48aca91e1af5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"24ded39c802d1fef3ae1bb051a054b0d22def8fdc5b18cc619ba48aca91e1af5","first_computed_at":"2026-07-05T11:09:46.787684Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:09:46.787684Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YRG8w0GVp3FjVTv0hHNhC+GA1jPFWgxmVuh/5wtw46OUB8FCaVZ9Ja7Frgz0VlZN3jZv79m385vT2aS+8JYHCw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:09:46.788378Z","signed_message":"canonical_sha256_bytes"},"source_id":"2504.20417","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a1be1e7b1660e3d8b1044d4efe56706c49ef52d72df4bfd1906c0ce1999bb9c5","sha256:e8daed492a67c86c866415d36e2da0a9fefea4f2b559ea7bd54869b4042496ef"],"state_sha256":"eb5552007bf27432bc71cf304c0ec2833a53d4f864db0802e3e5cdc303e4816f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kM4xORH6GFWpvGVK5es+IksLC9DVWMwqvAQZn1h/5KL5RVQwgOj9YSOrtxh4gf47nkLUHXV+vfPD8U/GS1p1BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T06:34:48.743421Z","bundle_sha256":"3f5b1d6197dceea7f33542eed1f743c2e9f736841972fce93956f29efafdcdf6"}}