{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:C3UOZQXZSZJOKV6RCA5YQEG5CP","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":"358de41d5cacdda112d90babd4322537a19330500c2019c67f2e7eaf5b25210f","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2018-02-19T05:31:41Z","title_canon_sha256":"ee93966bfc7c383716693d5ae22c4c5de92206aad4866b5312dd34c904d0181a"},"schema_version":"1.0","source":{"id":"1802.06519","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.06519","created_at":"2026-05-18T00:23:03Z"},{"alias_kind":"arxiv_version","alias_value":"1802.06519v1","created_at":"2026-05-18T00:23:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.06519","created_at":"2026-05-18T00:23:03Z"},{"alias_kind":"pith_short_12","alias_value":"C3UOZQXZSZJO","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"C3UOZQXZSZJOKV6R","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"C3UOZQXZ","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:aeb063c72b33b55b087ad9879e2a947d4ae27ec02afaddb981396617ddd43b81","target":"graph","created_at":"2026-05-18T00:23:03Z","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":"Quantum key distribution (QKD) allows two distant parties to share secret keys with the proven security even in the presence of an eavesdropper with unbounded computational power. Recently, GHz-clock decoy QKD systems have been realized by employing ultrafast optical communication devices. However, security loopholes of high-speed systems have not been fully explored yet. Here we point out a security loophole at the transmitter of the GHz-clock QKD, which is a common problem in high-speed QKD systems using practical band-width limited devices. We experimentally observe the inter-pulse intensit","authors_text":"Akihisa Tomita, Akio Tajima, Ken-ichiro Yoshino, Kensuke Nakata, Masahide Sasaki, Masahiro Takeoka, Masato Koashi, Mikio Fujiwara, Tatsuya Sumiya, Toshihiko Sasaki","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2018-02-19T05:31:41Z","title":"Quantum key distribution with an efficient countermeasure against correlated intensity fluctuations in optical pulses"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.06519","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:ed6c29d1333c83606423b9eb7d83a37171b8b825215f52db28075a8cb76a62e1","target":"record","created_at":"2026-05-18T00:23:03Z","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":"358de41d5cacdda112d90babd4322537a19330500c2019c67f2e7eaf5b25210f","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2018-02-19T05:31:41Z","title_canon_sha256":"ee93966bfc7c383716693d5ae22c4c5de92206aad4866b5312dd34c904d0181a"},"schema_version":"1.0","source":{"id":"1802.06519","kind":"arxiv","version":1}},"canonical_sha256":"16e8ecc2f99652e557d1103b8810dd13ca2e66f234021e20e32cd4850c92ca54","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"16e8ecc2f99652e557d1103b8810dd13ca2e66f234021e20e32cd4850c92ca54","first_computed_at":"2026-05-18T00:23:03.020297Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:23:03.020297Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"E080vUGkhFQc6U/D837q0tU9sJ7hS2M3ZB/Gtrdt0BTjZOb5okJQpnFnBktauS146PmWJMMQMUoo22hMds8+DA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:23:03.021022Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.06519","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ed6c29d1333c83606423b9eb7d83a37171b8b825215f52db28075a8cb76a62e1","sha256:aeb063c72b33b55b087ad9879e2a947d4ae27ec02afaddb981396617ddd43b81"],"state_sha256":"77168370aa504ea5b08402a28f71ed0a0a39d8d5f8bda3196ee069b135a9b875"}