{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:FNUPFM3X7LQ633VIGSITAX5RXC","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":"bdbac00a8f178f3c3a5fe6d76f39340a54c2febcca83b5699633a7f7b75500a1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-05-28T10:04:37Z","title_canon_sha256":"ec7fa07d878b72fb988b4340be76941354e8f604ac65642e801313cc6d8dbb18"},"schema_version":"1.0","source":{"id":"2605.29706","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.29706","created_at":"2026-05-29T01:05:56Z"},{"alias_kind":"arxiv_version","alias_value":"2605.29706v1","created_at":"2026-05-29T01:05:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.29706","created_at":"2026-05-29T01:05:56Z"},{"alias_kind":"pith_short_12","alias_value":"FNUPFM3X7LQ6","created_at":"2026-05-29T01:05:56Z"},{"alias_kind":"pith_short_16","alias_value":"FNUPFM3X7LQ633VI","created_at":"2026-05-29T01:05:56Z"},{"alias_kind":"pith_short_8","alias_value":"FNUPFM3X","created_at":"2026-05-29T01:05:56Z"}],"graph_snapshots":[{"event_id":"sha256:1184046dc608e7d372e0939247506e0602378beb4d1890a2e65d5904c2df3555","target":"graph","created_at":"2026-05-29T01:05:56Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2605.29706/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quantum key distribution (QKD) via geostationary Earth orbit (GEO) satellites offers a compelling route to continuous, continental-scale secure communications. However, operation in this regime entails extreme channel loss and significant background noise, particularly if daylight operation is desired. We present a comprehensive end-to-end feasibility study of a decoy-state BB84 protocol in a GEO downlink configuration, incorporating variable-length finite-key security and tight statistical bounds to expand the achievable positive-key regime. Our analysis encompasses the principal receiver arc","authors_text":"Marcos Curty, Vaisakh Mannalath, V\\'ictor Zapatero","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-05-28T10:04:37Z","title":"Finite-key feasibility of geostationary quantum key distribution"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.29706","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":"sha256:6c314eb8645aa180d7899616be697aec4846362a6bf8d1f5a14f3dc0a44befc5","target":"record","created_at":"2026-05-29T01:05:56Z","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":"bdbac00a8f178f3c3a5fe6d76f39340a54c2febcca83b5699633a7f7b75500a1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-05-28T10:04:37Z","title_canon_sha256":"ec7fa07d878b72fb988b4340be76941354e8f604ac65642e801313cc6d8dbb18"},"schema_version":"1.0","source":{"id":"2605.29706","kind":"arxiv","version":1}},"canonical_sha256":"2b68f2b377fae1edeea83491305fb1b88457ad3cfda7d8de43ea3135a7183f7a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2b68f2b377fae1edeea83491305fb1b88457ad3cfda7d8de43ea3135a7183f7a","first_computed_at":"2026-05-29T01:05:56.463690Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-29T01:05:56.463690Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nIH6D/2VIlvR6W0gfNTqCj1DRIzGm4UvnPpOWdV/5ny4WMOZmiPUzrAShBtG9mZXlp74JySxoiu6cUwqAtA8Cw==","signature_status":"signed_v1","signed_at":"2026-05-29T01:05:56.464161Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.29706","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6c314eb8645aa180d7899616be697aec4846362a6bf8d1f5a14f3dc0a44befc5","sha256:1184046dc608e7d372e0939247506e0602378beb4d1890a2e65d5904c2df3555"],"state_sha256":"fd71ce545695e26cd2bc83e78ae70c974ed551e5b266a87b3fdf7fb5d2f260ae"}