{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:EXFCQBBDT6HSWQHWQYIUYBHPUL","short_pith_number":"pith:EXFCQBBD","canonical_record":{"source":{"id":"1601.06377","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-01-24T12:56:38Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"dfdbd120f283b92ef81b76b184a65f5b80b6a3e83709af437b8f3d96774ba21f","abstract_canon_sha256":"b3825f024ddc859a4cd5d178a7dc8fc787721b5e02f3518208e15df8b2580a17"},"schema_version":"1.0"},"canonical_sha256":"25ca2804239f8f2b40f686114c04efa2e2eb8d1c578d736d798534fe6de10415","source":{"kind":"arxiv","id":"1601.06377","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.06377","created_at":"2026-05-18T01:22:04Z"},{"alias_kind":"arxiv_version","alias_value":"1601.06377v1","created_at":"2026-05-18T01:22:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.06377","created_at":"2026-05-18T01:22:04Z"},{"alias_kind":"pith_short_12","alias_value":"EXFCQBBDT6HS","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_16","alias_value":"EXFCQBBDT6HSWQHW","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_8","alias_value":"EXFCQBBD","created_at":"2026-05-18T12:30:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:EXFCQBBDT6HSWQHWQYIUYBHPUL","target":"record","payload":{"canonical_record":{"source":{"id":"1601.06377","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-01-24T12:56:38Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"dfdbd120f283b92ef81b76b184a65f5b80b6a3e83709af437b8f3d96774ba21f","abstract_canon_sha256":"b3825f024ddc859a4cd5d178a7dc8fc787721b5e02f3518208e15df8b2580a17"},"schema_version":"1.0"},"canonical_sha256":"25ca2804239f8f2b40f686114c04efa2e2eb8d1c578d736d798534fe6de10415","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:22:04.587300Z","signature_b64":"q+UtqlD/lisQTnymULoZ+uW0leRctMUjtJfAojrqRZwultwI7wWzAaO+YRvqjnNNazQ1htZ26QzmUW47gQfsCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"25ca2804239f8f2b40f686114c04efa2e2eb8d1c578d736d798534fe6de10415","last_reissued_at":"2026-05-18T01:22:04.586935Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:22:04.586935Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1601.06377","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:22:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+D0priMJHOITxARmR9rT4Gfixcj21iYREF1c2US5B/kYvsoOvASqW9n+Xf99sy6Skgul6cD/UvuwVQdOohhHBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T05:52:07.504413Z"},"content_sha256":"4de9c26d62c07dcfd2c04a74e744f3d853d2b266fa662d32f25e359d2cb9ef17","schema_version":"1.0","event_id":"sha256:4de9c26d62c07dcfd2c04a74e744f3d853d2b266fa662d32f25e359d2cb9ef17"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:EXFCQBBDT6HSWQHWQYIUYBHPUL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Average Secrecy Capacity of Free-Space Optical Communication Systems with On-Off Keying Modulation and Threshold Detection","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Jinxiao Zhu, Masahide Sasaki, Yin Chen","submitted_at":"2016-01-24T12:56:38Z","abstract_excerpt":"This paper considers secure communication over free-space optical (FSO) links suffering from turbulence-induced fading. In particular, we study the average secrecy capacity of applying physical layer security to achieve security in an FSO communication system with binary-level on-off keying intensity modulation and threshold detection, a widely used system in FSO communication. We first define the instantaneous secrecy capacity for our system and then provide a lower bound of it, which is achieved based on a simple design principle for practical applications and yields a simpler equation. We n"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.06377","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:22:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X1CV8fPZbbqPGh4ft+X8SmPl+Dwedj34ProzMEc3dSSQ7d2x1qCMMypmr0C6J3Nd1c9K9UFv27kuQCQyscwcAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T05:52:07.505158Z"},"content_sha256":"3bbd2133b5e5b07a0961347085b77fca3cf9c9cffc273be4e297590e6ee8f037","schema_version":"1.0","event_id":"sha256:3bbd2133b5e5b07a0961347085b77fca3cf9c9cffc273be4e297590e6ee8f037"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EXFCQBBDT6HSWQHWQYIUYBHPUL/bundle.json","state_url":"https://pith.science/pith/EXFCQBBDT6HSWQHWQYIUYBHPUL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EXFCQBBDT6HSWQHWQYIUYBHPUL/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-10T05:52:07Z","links":{"resolver":"https://pith.science/pith/EXFCQBBDT6HSWQHWQYIUYBHPUL","bundle":"https://pith.science/pith/EXFCQBBDT6HSWQHWQYIUYBHPUL/bundle.json","state":"https://pith.science/pith/EXFCQBBDT6HSWQHWQYIUYBHPUL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EXFCQBBDT6HSWQHWQYIUYBHPUL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:EXFCQBBDT6HSWQHWQYIUYBHPUL","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":"b3825f024ddc859a4cd5d178a7dc8fc787721b5e02f3518208e15df8b2580a17","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-01-24T12:56:38Z","title_canon_sha256":"dfdbd120f283b92ef81b76b184a65f5b80b6a3e83709af437b8f3d96774ba21f"},"schema_version":"1.0","source":{"id":"1601.06377","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.06377","created_at":"2026-05-18T01:22:04Z"},{"alias_kind":"arxiv_version","alias_value":"1601.06377v1","created_at":"2026-05-18T01:22:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.06377","created_at":"2026-05-18T01:22:04Z"},{"alias_kind":"pith_short_12","alias_value":"EXFCQBBDT6HS","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_16","alias_value":"EXFCQBBDT6HSWQHW","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_8","alias_value":"EXFCQBBD","created_at":"2026-05-18T12:30:15Z"}],"graph_snapshots":[{"event_id":"sha256:3bbd2133b5e5b07a0961347085b77fca3cf9c9cffc273be4e297590e6ee8f037","target":"graph","created_at":"2026-05-18T01:22:04Z","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":"This paper considers secure communication over free-space optical (FSO) links suffering from turbulence-induced fading. In particular, we study the average secrecy capacity of applying physical layer security to achieve security in an FSO communication system with binary-level on-off keying intensity modulation and threshold detection, a widely used system in FSO communication. We first define the instantaneous secrecy capacity for our system and then provide a lower bound of it, which is achieved based on a simple design principle for practical applications and yields a simpler equation. We n","authors_text":"Jinxiao Zhu, Masahide Sasaki, Yin Chen","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-01-24T12:56:38Z","title":"Average Secrecy Capacity of Free-Space Optical Communication Systems with On-Off Keying Modulation and Threshold Detection"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.06377","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":"sha256:4de9c26d62c07dcfd2c04a74e744f3d853d2b266fa662d32f25e359d2cb9ef17","target":"record","created_at":"2026-05-18T01:22:04Z","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":"b3825f024ddc859a4cd5d178a7dc8fc787721b5e02f3518208e15df8b2580a17","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-01-24T12:56:38Z","title_canon_sha256":"dfdbd120f283b92ef81b76b184a65f5b80b6a3e83709af437b8f3d96774ba21f"},"schema_version":"1.0","source":{"id":"1601.06377","kind":"arxiv","version":1}},"canonical_sha256":"25ca2804239f8f2b40f686114c04efa2e2eb8d1c578d736d798534fe6de10415","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"25ca2804239f8f2b40f686114c04efa2e2eb8d1c578d736d798534fe6de10415","first_computed_at":"2026-05-18T01:22:04.586935Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:22:04.586935Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"q+UtqlD/lisQTnymULoZ+uW0leRctMUjtJfAojrqRZwultwI7wWzAaO+YRvqjnNNazQ1htZ26QzmUW47gQfsCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:22:04.587300Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.06377","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4de9c26d62c07dcfd2c04a74e744f3d853d2b266fa662d32f25e359d2cb9ef17","sha256:3bbd2133b5e5b07a0961347085b77fca3cf9c9cffc273be4e297590e6ee8f037"],"state_sha256":"eb37e8a89e4aaa757d9d06503e13ed6e6f8dfc675e7deda0d96afd08968f0250"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eJlxNjmkvVAgJ+d+KMcAd/VNxhAdNYCH1ZA0X54BgIpFdI/+GYNeQyYOm+clTFRzIXI/HrkWjM2H4H+o0iOkAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T05:52:07.509908Z","bundle_sha256":"21440299bab003c503eb18b4486022d621c04c780008ba5d9a49c3598a78551b"}}