{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:IEQ52RXUMMOHOV3DFAJPAYL2OS","short_pith_number":"pith:IEQ52RXU","canonical_record":{"source":{"id":"quant-ph/0407062","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"2004-07-08T05:21:26Z","cross_cats_sorted":[],"title_canon_sha256":"d76591a4e994cbd63d8509e615e45a09b244d188f8019685f109f5c683ac2d82","abstract_canon_sha256":"2f759f5a4506f278ae4c604e580feca083e5d622ee81a9d06b16ebe82ada5d32"},"schema_version":"1.0"},"canonical_sha256":"4121dd46f4631c7757632812f0617a74b5365f78363ca42301b6c9c62df13523","source":{"kind":"arxiv","id":"quant-ph/0407062","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/0407062","created_at":"2026-05-18T01:37:58Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0407062v1","created_at":"2026-05-18T01:37:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0407062","created_at":"2026-05-18T01:37:58Z"},{"alias_kind":"pith_short_12","alias_value":"IEQ52RXUMMOH","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"IEQ52RXUMMOHOV3D","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"IEQ52RXU","created_at":"2026-05-18T12:25:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:IEQ52RXUMMOHOV3DFAJPAYL2OS","target":"record","payload":{"canonical_record":{"source":{"id":"quant-ph/0407062","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"2004-07-08T05:21:26Z","cross_cats_sorted":[],"title_canon_sha256":"d76591a4e994cbd63d8509e615e45a09b244d188f8019685f109f5c683ac2d82","abstract_canon_sha256":"2f759f5a4506f278ae4c604e580feca083e5d622ee81a9d06b16ebe82ada5d32"},"schema_version":"1.0"},"canonical_sha256":"4121dd46f4631c7757632812f0617a74b5365f78363ca42301b6c9c62df13523","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:37:58.505412Z","signature_b64":"xVSNp/SPta9uR4rgLtxBqvfvM4v3s1Ri8KyDhVqj7066s8QVBEXlFP/U9xdyfjsm4I65ti3Q6WvEag0yTtDNDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4121dd46f4631c7757632812f0617a74b5365f78363ca42301b6c9c62df13523","last_reissued_at":"2026-05-18T01:37:58.504723Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:37:58.504723Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"quant-ph/0407062","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":"2026-05-18T01:37:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kft8m7kNiU6ucjWS+IxVjH5ipIBBvuHFRteuGLeJSPcM98SLEACOx2Rs63Xb8K406Cgal6R85LUf/fI0oOoOCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T18:26:48.694241Z"},"content_sha256":"a15884bacdf8da32282b6b564acffc0708333e4d3e477d320fd70bbfe859011d","schema_version":"1.0","event_id":"sha256:a15884bacdf8da32282b6b564acffc0708333e4d3e477d320fd70bbfe859011d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:IEQ52RXUMMOHOV3DFAJPAYL2OS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum stream cipher based on optical communications","license":"","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Katsuyoshi Harasawa, Kentaro Kato, Masaki Sohma, Osamu Hirota, Tsuyoshi S. Usuda","submitted_at":"2004-07-08T05:21:26Z","abstract_excerpt":"In 2000, an attractive new quantum cryptography was discovered by H.P.Yuen based on quantum communication theory. It is applicable to direct encryption, for example quantum stream cipher based on Yuen protocol(Y-00), with high speeds and for long distance by sophisticated optical devices which can work under the average photon number per signal light pulse:$<n> = 1000 \\sim 10000$. In addition, it may provide information-theoretic security against known/chosen plaintext attack, which has no classical analogue. That is, one can provide secure communication, even the system has $H(K) << H(X)$.\n  "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0407062","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":"2026-05-18T01:37:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8jHrdQDqSYDkTem6Vpj1nY6c1UuKDERoZ2xeGALVxMrj2shdZMAzTeicYlxoEGQ4svctL7K9uOHOiUluzEcqCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T18:26:48.694931Z"},"content_sha256":"c9aa80fb61a9dd580b21e30498cbca8290c6111d7de7a51a383c591fe50f4c53","schema_version":"1.0","event_id":"sha256:c9aa80fb61a9dd580b21e30498cbca8290c6111d7de7a51a383c591fe50f4c53"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IEQ52RXUMMOHOV3DFAJPAYL2OS/bundle.json","state_url":"https://pith.science/pith/IEQ52RXUMMOHOV3DFAJPAYL2OS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IEQ52RXUMMOHOV3DFAJPAYL2OS/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":"2026-05-28T18:26:48Z","links":{"resolver":"https://pith.science/pith/IEQ52RXUMMOHOV3DFAJPAYL2OS","bundle":"https://pith.science/pith/IEQ52RXUMMOHOV3DFAJPAYL2OS/bundle.json","state":"https://pith.science/pith/IEQ52RXUMMOHOV3DFAJPAYL2OS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IEQ52RXUMMOHOV3DFAJPAYL2OS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:IEQ52RXUMMOHOV3DFAJPAYL2OS","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":"2f759f5a4506f278ae4c604e580feca083e5d622ee81a9d06b16ebe82ada5d32","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2004-07-08T05:21:26Z","title_canon_sha256":"d76591a4e994cbd63d8509e615e45a09b244d188f8019685f109f5c683ac2d82"},"schema_version":"1.0","source":{"id":"quant-ph/0407062","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/0407062","created_at":"2026-05-18T01:37:58Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0407062v1","created_at":"2026-05-18T01:37:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0407062","created_at":"2026-05-18T01:37:58Z"},{"alias_kind":"pith_short_12","alias_value":"IEQ52RXUMMOH","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"IEQ52RXUMMOHOV3D","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"IEQ52RXU","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:c9aa80fb61a9dd580b21e30498cbca8290c6111d7de7a51a383c591fe50f4c53","target":"graph","created_at":"2026-05-18T01:37:58Z","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":"In 2000, an attractive new quantum cryptography was discovered by H.P.Yuen based on quantum communication theory. It is applicable to direct encryption, for example quantum stream cipher based on Yuen protocol(Y-00), with high speeds and for long distance by sophisticated optical devices which can work under the average photon number per signal light pulse:$<n> = 1000 \\sim 10000$. In addition, it may provide information-theoretic security against known/chosen plaintext attack, which has no classical analogue. That is, one can provide secure communication, even the system has $H(K) << H(X)$.\n  ","authors_text":"Katsuyoshi Harasawa, Kentaro Kato, Masaki Sohma, Osamu Hirota, Tsuyoshi S. Usuda","cross_cats":[],"headline":"","license":"","primary_cat":"quant-ph","submitted_at":"2004-07-08T05:21:26Z","title":"Quantum stream cipher based on optical communications"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0407062","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:a15884bacdf8da32282b6b564acffc0708333e4d3e477d320fd70bbfe859011d","target":"record","created_at":"2026-05-18T01:37:58Z","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":"2f759f5a4506f278ae4c604e580feca083e5d622ee81a9d06b16ebe82ada5d32","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2004-07-08T05:21:26Z","title_canon_sha256":"d76591a4e994cbd63d8509e615e45a09b244d188f8019685f109f5c683ac2d82"},"schema_version":"1.0","source":{"id":"quant-ph/0407062","kind":"arxiv","version":1}},"canonical_sha256":"4121dd46f4631c7757632812f0617a74b5365f78363ca42301b6c9c62df13523","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4121dd46f4631c7757632812f0617a74b5365f78363ca42301b6c9c62df13523","first_computed_at":"2026-05-18T01:37:58.504723Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:37:58.504723Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xVSNp/SPta9uR4rgLtxBqvfvM4v3s1Ri8KyDhVqj7066s8QVBEXlFP/U9xdyfjsm4I65ti3Q6WvEag0yTtDNDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:37:58.505412Z","signed_message":"canonical_sha256_bytes"},"source_id":"quant-ph/0407062","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a15884bacdf8da32282b6b564acffc0708333e4d3e477d320fd70bbfe859011d","sha256:c9aa80fb61a9dd580b21e30498cbca8290c6111d7de7a51a383c591fe50f4c53"],"state_sha256":"4f694efe772883cc3f405b6f897dbe442d3f2a5c12e5d58703d7baee48614c0d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NDoUKCzH/7ZkltqnYNdejkOzwTR2JyhYWEgSEIUJtUCJKoG+IDtFSpb9qR/y3hRv/rRuksVGuiuR7AIQtot+Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T18:26:48.698750Z","bundle_sha256":"10b0eda3e51e44ef1e098ec42b1d222568c2b9707d428a2d984bb2ca1a46c3b2"}}