{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:4M3CAEHPXUT73KRGOOBXIYP2CX","short_pith_number":"pith:4M3CAEHP","schema_version":"1.0","canonical_sha256":"e3362010efbd27fdaa2673837461fa15f8175db8cb2a147223bfa0faa5889f26","source":{"kind":"arxiv","id":"1512.08129","version":2},"attestation_state":"computed","paper":{"title":"Security of differential quadrature phase shift quantum key distribution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Masato Koashi, Shun Kawakami, Toshihiko Sasaki","submitted_at":"2015-12-26T18:17:10Z","abstract_excerpt":"One of the simplest methods for implementing quantum key distribution over fiber-optic communication is the Bennett-Brassard 1984 protocol with phase encoding (PE-BB84 protocol), in which the sender uses phase modulation over double pulses from a laser and the receiver uses a passive delayed interferometer. Using essentially the same setup and by regarding a train of many pulses as a single block, one can carry out the so-called differential quadrature phase shift (DQPS) protocol, which is a variant of differential phase shift (DPS) protocols. Here we prove the security of the DQPS protocol ba"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1512.08129","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-12-26T18:17:10Z","cross_cats_sorted":[],"title_canon_sha256":"9eff4282203b22c41f77f22b6d3282292edec18dcf7432f14156d53525ae9738","abstract_canon_sha256":"99cdfc47ede0347b765be61a9df43123b6e38e4a2d369e9c71def229fb957a08"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:07:17.171790Z","signature_b64":"bM/77CxGeZyYSLDBHixgdNty1o//VSK5/jCyEGVVYgrm5UH31KdTUXc+XyITpmY9P4REAKhZo+to98cVutA1Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e3362010efbd27fdaa2673837461fa15f8175db8cb2a147223bfa0faa5889f26","last_reissued_at":"2026-05-18T01:07:17.171304Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:07:17.171304Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Security of differential quadrature phase shift quantum key distribution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Masato Koashi, Shun Kawakami, Toshihiko Sasaki","submitted_at":"2015-12-26T18:17:10Z","abstract_excerpt":"One of the simplest methods for implementing quantum key distribution over fiber-optic communication is the Bennett-Brassard 1984 protocol with phase encoding (PE-BB84 protocol), in which the sender uses phase modulation over double pulses from a laser and the receiver uses a passive delayed interferometer. Using essentially the same setup and by regarding a train of many pulses as a single block, one can carry out the so-called differential quadrature phase shift (DQPS) protocol, which is a variant of differential phase shift (DPS) protocols. Here we prove the security of the DQPS protocol ba"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.08129","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1512.08129","created_at":"2026-05-18T01:07:17.171403+00:00"},{"alias_kind":"arxiv_version","alias_value":"1512.08129v2","created_at":"2026-05-18T01:07:17.171403+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.08129","created_at":"2026-05-18T01:07:17.171403+00:00"},{"alias_kind":"pith_short_12","alias_value":"4M3CAEHPXUT7","created_at":"2026-05-18T12:29:05.191682+00:00"},{"alias_kind":"pith_short_16","alias_value":"4M3CAEHPXUT73KRG","created_at":"2026-05-18T12:29:05.191682+00:00"},{"alias_kind":"pith_short_8","alias_value":"4M3CAEHP","created_at":"2026-05-18T12:29:05.191682+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/4M3CAEHPXUT73KRGOOBXIYP2CX","json":"https://pith.science/pith/4M3CAEHPXUT73KRGOOBXIYP2CX.json","graph_json":"https://pith.science/api/pith-number/4M3CAEHPXUT73KRGOOBXIYP2CX/graph.json","events_json":"https://pith.science/api/pith-number/4M3CAEHPXUT73KRGOOBXIYP2CX/events.json","paper":"https://pith.science/paper/4M3CAEHP"},"agent_actions":{"view_html":"https://pith.science/pith/4M3CAEHPXUT73KRGOOBXIYP2CX","download_json":"https://pith.science/pith/4M3CAEHPXUT73KRGOOBXIYP2CX.json","view_paper":"https://pith.science/paper/4M3CAEHP","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1512.08129&json=true","fetch_graph":"https://pith.science/api/pith-number/4M3CAEHPXUT73KRGOOBXIYP2CX/graph.json","fetch_events":"https://pith.science/api/pith-number/4M3CAEHPXUT73KRGOOBXIYP2CX/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4M3CAEHPXUT73KRGOOBXIYP2CX/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4M3CAEHPXUT73KRGOOBXIYP2CX/action/storage_attestation","attest_author":"https://pith.science/pith/4M3CAEHPXUT73KRGOOBXIYP2CX/action/author_attestation","sign_citation":"https://pith.science/pith/4M3CAEHPXUT73KRGOOBXIYP2CX/action/citation_signature","submit_replication":"https://pith.science/pith/4M3CAEHPXUT73KRGOOBXIYP2CX/action/replication_record"}},"created_at":"2026-05-18T01:07:17.171403+00:00","updated_at":"2026-05-18T01:07:17.171403+00:00"}