{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:3PPN4YMKH6Q2TLOF2J4CEIAJN4","short_pith_number":"pith:3PPN4YMK","schema_version":"1.0","canonical_sha256":"dbdede618a3fa1a9adc5d2782220096f0e561e127065f985402e4c3f22e339e0","source":{"kind":"arxiv","id":"2107.03629","version":1},"attestation_state":"computed","paper":{"title":"Simple and loss-tolerant free-space QKD using a squeezed laser","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Matthew S. Winnel, Nedasadat Hosseinidehaj, Timothy C. Ralph","submitted_at":"2021-07-08T06:46:37Z","abstract_excerpt":"We consider a continuous-variable (CV) quantum key distribution (QKD) protocol over free-space channels, which is simpler and more robust than typical CV QKD protocols. It uses a bright laser, squeezed and modulated in the amplitude quadrature, and self-homodyne detection. We consider a scenario, where the line of sight is classically monitored to detect active eavesdroppers, so that we can assume a passive eavesdropper. Under this assumption, we analyse security of the QKD protocol in the composable finite-size regime. Proper modulation of the squeezed laser to the shot-noise level can comple"},"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":"2107.03629","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-07-08T06:46:37Z","cross_cats_sorted":[],"title_canon_sha256":"e04218bee5f6ce7537b01c9f82d647575a1e397ee7da16fd914c8206ab721af8","abstract_canon_sha256":"c4b20763bab303fb7d0a8277bb766c02e03b58089fbd51dae28e74de174b6a67"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:03:48.764323Z","signature_b64":"/dxEj44Fjum4GruO50elTtydELl84C6ZhQcCpevpfxSyy0F/dXkpwu51ibCzENziYhLDB5bMNyt5ln6xZE/HAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dbdede618a3fa1a9adc5d2782220096f0e561e127065f985402e4c3f22e339e0","last_reissued_at":"2026-07-05T04:03:48.763860Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:03:48.763860Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Simple and loss-tolerant free-space QKD using a squeezed laser","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Matthew S. Winnel, Nedasadat Hosseinidehaj, Timothy C. Ralph","submitted_at":"2021-07-08T06:46:37Z","abstract_excerpt":"We consider a continuous-variable (CV) quantum key distribution (QKD) protocol over free-space channels, which is simpler and more robust than typical CV QKD protocols. It uses a bright laser, squeezed and modulated in the amplitude quadrature, and self-homodyne detection. We consider a scenario, where the line of sight is classically monitored to detect active eavesdroppers, so that we can assume a passive eavesdropper. Under this assumption, we analyse security of the QKD protocol in the composable finite-size regime. Proper modulation of the squeezed laser to the shot-noise level can comple"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.03629","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2107.03629/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2107.03629","created_at":"2026-07-05T04:03:48.763917+00:00"},{"alias_kind":"arxiv_version","alias_value":"2107.03629v1","created_at":"2026-07-05T04:03:48.763917+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.03629","created_at":"2026-07-05T04:03:48.763917+00:00"},{"alias_kind":"pith_short_12","alias_value":"3PPN4YMKH6Q2","created_at":"2026-07-05T04:03:48.763917+00:00"},{"alias_kind":"pith_short_16","alias_value":"3PPN4YMKH6Q2TLOF","created_at":"2026-07-05T04:03:48.763917+00:00"},{"alias_kind":"pith_short_8","alias_value":"3PPN4YMK","created_at":"2026-07-05T04:03:48.763917+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/3PPN4YMKH6Q2TLOF2J4CEIAJN4","json":"https://pith.science/pith/3PPN4YMKH6Q2TLOF2J4CEIAJN4.json","graph_json":"https://pith.science/api/pith-number/3PPN4YMKH6Q2TLOF2J4CEIAJN4/graph.json","events_json":"https://pith.science/api/pith-number/3PPN4YMKH6Q2TLOF2J4CEIAJN4/events.json","paper":"https://pith.science/paper/3PPN4YMK"},"agent_actions":{"view_html":"https://pith.science/pith/3PPN4YMKH6Q2TLOF2J4CEIAJN4","download_json":"https://pith.science/pith/3PPN4YMKH6Q2TLOF2J4CEIAJN4.json","view_paper":"https://pith.science/paper/3PPN4YMK","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2107.03629&json=true","fetch_graph":"https://pith.science/api/pith-number/3PPN4YMKH6Q2TLOF2J4CEIAJN4/graph.json","fetch_events":"https://pith.science/api/pith-number/3PPN4YMKH6Q2TLOF2J4CEIAJN4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3PPN4YMKH6Q2TLOF2J4CEIAJN4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3PPN4YMKH6Q2TLOF2J4CEIAJN4/action/storage_attestation","attest_author":"https://pith.science/pith/3PPN4YMKH6Q2TLOF2J4CEIAJN4/action/author_attestation","sign_citation":"https://pith.science/pith/3PPN4YMKH6Q2TLOF2J4CEIAJN4/action/citation_signature","submit_replication":"https://pith.science/pith/3PPN4YMKH6Q2TLOF2J4CEIAJN4/action/replication_record"}},"created_at":"2026-07-05T04:03:48.763917+00:00","updated_at":"2026-07-05T04:03:48.763917+00:00"}