{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:5X4BFXSV2FG4PV2G6ESGELB5OI","short_pith_number":"pith:5X4BFXSV","schema_version":"1.0","canonical_sha256":"edf812de55d14dc7d746f124622c3d72142e81371e13a12297dab1c7d1b3e26f","source":{"kind":"arxiv","id":"1108.3411","version":1},"attestation_state":"computed","paper":{"title":"Implementation of Two Way Free Space Quantum Key Distribution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"M. F. Abdul Khir, M. N. Mohd Zain, S. Saharudin, S. Shaari, Suryadi","submitted_at":"2011-08-17T07:11:40Z","abstract_excerpt":"We report an implementation over free space medium of a two way four states quantum key distribution (QKD) protocol namely the LM05. The fully automated setup demonstrated a secure key generation rate of 3.54 kbits per second and quantum bit error rate (QBER) of 3.34% at mean photon number ({\\mu}) = 0.15. The maximum tolerable channel loss for secure key generation considering Photon Number Splitting (PNS) attack, was 5.68 [dB]. The result successfully demonstrated the feasibility of a two way QKD protocol implementation over free space medium."},"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":"1108.3411","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-08-17T07:11:40Z","cross_cats_sorted":[],"title_canon_sha256":"bea466c30bfa2d01fdce9163976d43d4a18a8aab1f97723b3e69e32fabb93c50","abstract_canon_sha256":"d2ea818ca3b9a20efe2a754c119167c1af9dbd6e3c41e89bb6c4eb20bb2307ba"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:01:11.441808Z","signature_b64":"x9cfRPaL6gm8dC0fqtWQn8s6Ie0y1iSMhPK6ID3n0w1n8NY7KjUrtDRY6m+VeRoqnC+7WQRuRDQwZuziHkI6Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"edf812de55d14dc7d746f124622c3d72142e81371e13a12297dab1c7d1b3e26f","last_reissued_at":"2026-05-18T04:01:11.441108Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:01:11.441108Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Implementation of Two Way Free Space Quantum Key Distribution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"M. F. Abdul Khir, M. N. Mohd Zain, S. Saharudin, S. Shaari, Suryadi","submitted_at":"2011-08-17T07:11:40Z","abstract_excerpt":"We report an implementation over free space medium of a two way four states quantum key distribution (QKD) protocol namely the LM05. The fully automated setup demonstrated a secure key generation rate of 3.54 kbits per second and quantum bit error rate (QBER) of 3.34% at mean photon number ({\\mu}) = 0.15. The maximum tolerable channel loss for secure key generation considering Photon Number Splitting (PNS) attack, was 5.68 [dB]. The result successfully demonstrated the feasibility of a two way QKD protocol implementation over free space medium."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.3411","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1108.3411","created_at":"2026-05-18T04:01:11.441207+00:00"},{"alias_kind":"arxiv_version","alias_value":"1108.3411v1","created_at":"2026-05-18T04:01:11.441207+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.3411","created_at":"2026-05-18T04:01:11.441207+00:00"},{"alias_kind":"pith_short_12","alias_value":"5X4BFXSV2FG4","created_at":"2026-05-18T12:26:22.705136+00:00"},{"alias_kind":"pith_short_16","alias_value":"5X4BFXSV2FG4PV2G","created_at":"2026-05-18T12:26:22.705136+00:00"},{"alias_kind":"pith_short_8","alias_value":"5X4BFXSV","created_at":"2026-05-18T12:26:22.705136+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/5X4BFXSV2FG4PV2G6ESGELB5OI","json":"https://pith.science/pith/5X4BFXSV2FG4PV2G6ESGELB5OI.json","graph_json":"https://pith.science/api/pith-number/5X4BFXSV2FG4PV2G6ESGELB5OI/graph.json","events_json":"https://pith.science/api/pith-number/5X4BFXSV2FG4PV2G6ESGELB5OI/events.json","paper":"https://pith.science/paper/5X4BFXSV"},"agent_actions":{"view_html":"https://pith.science/pith/5X4BFXSV2FG4PV2G6ESGELB5OI","download_json":"https://pith.science/pith/5X4BFXSV2FG4PV2G6ESGELB5OI.json","view_paper":"https://pith.science/paper/5X4BFXSV","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1108.3411&json=true","fetch_graph":"https://pith.science/api/pith-number/5X4BFXSV2FG4PV2G6ESGELB5OI/graph.json","fetch_events":"https://pith.science/api/pith-number/5X4BFXSV2FG4PV2G6ESGELB5OI/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/5X4BFXSV2FG4PV2G6ESGELB5OI/action/timestamp_anchor","attest_storage":"https://pith.science/pith/5X4BFXSV2FG4PV2G6ESGELB5OI/action/storage_attestation","attest_author":"https://pith.science/pith/5X4BFXSV2FG4PV2G6ESGELB5OI/action/author_attestation","sign_citation":"https://pith.science/pith/5X4BFXSV2FG4PV2G6ESGELB5OI/action/citation_signature","submit_replication":"https://pith.science/pith/5X4BFXSV2FG4PV2G6ESGELB5OI/action/replication_record"}},"created_at":"2026-05-18T04:01:11.441207+00:00","updated_at":"2026-05-18T04:01:11.441207+00:00"}