{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:3L2S6V25MRFBDJB72ESWFBABXJ","short_pith_number":"pith:3L2S6V25","canonical_record":{"source":{"id":"2411.09235","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2024-11-14T07:02:01Z","cross_cats_sorted":[],"title_canon_sha256":"31b943935d0e34cd3b1ea98407bf73e4fcaf38068fc05a7b31cabf7957cadfec","abstract_canon_sha256":"6668b2e32778952698cf8e592bb084eda79472984cd9804baf81d9396ceca897"},"schema_version":"1.0"},"canonical_sha256":"daf52f575d644a11a43fd125628401ba5b4b251f04437608bfd1c85a366981f6","source":{"kind":"arxiv","id":"2411.09235","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2411.09235","created_at":"2026-07-05T09:35:23Z"},{"alias_kind":"arxiv_version","alias_value":"2411.09235v1","created_at":"2026-07-05T09:35:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2411.09235","created_at":"2026-07-05T09:35:23Z"},{"alias_kind":"pith_short_12","alias_value":"3L2S6V25MRFB","created_at":"2026-07-05T09:35:23Z"},{"alias_kind":"pith_short_16","alias_value":"3L2S6V25MRFBDJB7","created_at":"2026-07-05T09:35:23Z"},{"alias_kind":"pith_short_8","alias_value":"3L2S6V25","created_at":"2026-07-05T09:35:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:3L2S6V25MRFBDJB72ESWFBABXJ","target":"record","payload":{"canonical_record":{"source":{"id":"2411.09235","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2024-11-14T07:02:01Z","cross_cats_sorted":[],"title_canon_sha256":"31b943935d0e34cd3b1ea98407bf73e4fcaf38068fc05a7b31cabf7957cadfec","abstract_canon_sha256":"6668b2e32778952698cf8e592bb084eda79472984cd9804baf81d9396ceca897"},"schema_version":"1.0"},"canonical_sha256":"daf52f575d644a11a43fd125628401ba5b4b251f04437608bfd1c85a366981f6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:35:23.054153Z","signature_b64":"z+F5QVPJnBwNq1EUxDvM77wwBU3OggVXebc+3XNXDGDHChNsWfYmH5tytC96lTFImKiDG5F42i9Eu/d852ziBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"daf52f575d644a11a43fd125628401ba5b4b251f04437608bfd1c85a366981f6","last_reissued_at":"2026-07-05T09:35:23.053743Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:35:23.053743Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2411.09235","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":"2026-07-05T09:35:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K+f0hd5Te1usrdKkzVcAhYMMjVWIZDEeqCOBFZruilOqkTxRL2MxttKzGlvBEBY+QR/BJNuEAFZia239Z6lCDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T12:48:50.519018Z"},"content_sha256":"a0b4a87f74ef5bbf6bc8074d611143760d280e0a94363752b56601df39b0cd64","schema_version":"1.0","event_id":"sha256:a0b4a87f74ef5bbf6bc8074d611143760d280e0a94363752b56601df39b0cd64"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:3L2S6V25MRFBDJB72ESWFBABXJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"FAS for Secure and Covert Communications","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Chau Yuen, Hyundong Shin, Junteng Yao, Kai-Kit Wong, Liangxiao Xin, Ming Jin, Tuo Wu","submitted_at":"2024-11-14T07:02:01Z","abstract_excerpt":"This letter considers a fluid antenna system (FAS)-aided secure and covert communication system, where the transmitter adjusts multiple fluid antennas' positions to achieve secure and covert transmission under the threat of an eavesdropper and the detection of a warden. This letter aims to maximize the secrecy rate while satisfying the covertness constraint. Unfortunately, the optimization problem is non-convex due to the coupled variables. To tackle this, we propose an alternating optimization (AO) algorithm to alternatively optimize the optimization variables in an iterative manner. In parti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2411.09235","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/2411.09235/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T09:35:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7PpN4tgeBpAcEn3ChvuBKXCo4oQSUL/PekdEXl1A2ZVL9NPYgsCBJZ5f2hj406lHMOqZVIWKrW5not7iZ8+kDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T12:48:50.519458Z"},"content_sha256":"93649eacaba1014650ca1176f26b0a32edfee61cd1d6ceb9dbd2854ba58a34eb","schema_version":"1.0","event_id":"sha256:93649eacaba1014650ca1176f26b0a32edfee61cd1d6ceb9dbd2854ba58a34eb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3L2S6V25MRFBDJB72ESWFBABXJ/bundle.json","state_url":"https://pith.science/pith/3L2S6V25MRFBDJB72ESWFBABXJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3L2S6V25MRFBDJB72ESWFBABXJ/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":"2026-08-17T12:48:50Z","links":{"resolver":"https://pith.science/pith/3L2S6V25MRFBDJB72ESWFBABXJ","bundle":"https://pith.science/pith/3L2S6V25MRFBDJB72ESWFBABXJ/bundle.json","state":"https://pith.science/pith/3L2S6V25MRFBDJB72ESWFBABXJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3L2S6V25MRFBDJB72ESWFBABXJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:3L2S6V25MRFBDJB72ESWFBABXJ","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":"6668b2e32778952698cf8e592bb084eda79472984cd9804baf81d9396ceca897","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2024-11-14T07:02:01Z","title_canon_sha256":"31b943935d0e34cd3b1ea98407bf73e4fcaf38068fc05a7b31cabf7957cadfec"},"schema_version":"1.0","source":{"id":"2411.09235","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2411.09235","created_at":"2026-07-05T09:35:23Z"},{"alias_kind":"arxiv_version","alias_value":"2411.09235v1","created_at":"2026-07-05T09:35:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2411.09235","created_at":"2026-07-05T09:35:23Z"},{"alias_kind":"pith_short_12","alias_value":"3L2S6V25MRFB","created_at":"2026-07-05T09:35:23Z"},{"alias_kind":"pith_short_16","alias_value":"3L2S6V25MRFBDJB7","created_at":"2026-07-05T09:35:23Z"},{"alias_kind":"pith_short_8","alias_value":"3L2S6V25","created_at":"2026-07-05T09:35:23Z"}],"graph_snapshots":[{"event_id":"sha256:93649eacaba1014650ca1176f26b0a32edfee61cd1d6ceb9dbd2854ba58a34eb","target":"graph","created_at":"2026-07-05T09:35:23Z","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/2411.09235/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This letter considers a fluid antenna system (FAS)-aided secure and covert communication system, where the transmitter adjusts multiple fluid antennas' positions to achieve secure and covert transmission under the threat of an eavesdropper and the detection of a warden. This letter aims to maximize the secrecy rate while satisfying the covertness constraint. Unfortunately, the optimization problem is non-convex due to the coupled variables. To tackle this, we propose an alternating optimization (AO) algorithm to alternatively optimize the optimization variables in an iterative manner. In parti","authors_text":"Chau Yuen, Hyundong Shin, Junteng Yao, Kai-Kit Wong, Liangxiao Xin, Ming Jin, Tuo Wu","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2024-11-14T07:02:01Z","title":"FAS for Secure and Covert Communications"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2411.09235","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:a0b4a87f74ef5bbf6bc8074d611143760d280e0a94363752b56601df39b0cd64","target":"record","created_at":"2026-07-05T09:35:23Z","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":"6668b2e32778952698cf8e592bb084eda79472984cd9804baf81d9396ceca897","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2024-11-14T07:02:01Z","title_canon_sha256":"31b943935d0e34cd3b1ea98407bf73e4fcaf38068fc05a7b31cabf7957cadfec"},"schema_version":"1.0","source":{"id":"2411.09235","kind":"arxiv","version":1}},"canonical_sha256":"daf52f575d644a11a43fd125628401ba5b4b251f04437608bfd1c85a366981f6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"daf52f575d644a11a43fd125628401ba5b4b251f04437608bfd1c85a366981f6","first_computed_at":"2026-07-05T09:35:23.053743Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:35:23.053743Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"z+F5QVPJnBwNq1EUxDvM77wwBU3OggVXebc+3XNXDGDHChNsWfYmH5tytC96lTFImKiDG5F42i9Eu/d852ziBA==","signature_status":"signed_v1","signed_at":"2026-07-05T09:35:23.054153Z","signed_message":"canonical_sha256_bytes"},"source_id":"2411.09235","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a0b4a87f74ef5bbf6bc8074d611143760d280e0a94363752b56601df39b0cd64","sha256:93649eacaba1014650ca1176f26b0a32edfee61cd1d6ceb9dbd2854ba58a34eb"],"state_sha256":"4cc9c79053498377da95fd3e23aa211d66622122865d4a6824c00deb9836265d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/0PvduKmb9/3IwjqzU/uHdFg6ELt6vMhIxxIE9p81FHTqAsQrVPngylfYbt5c/LxWqPbp38xyEjvY/brM7BDCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T12:48:50.522323Z","bundle_sha256":"c589da44241b80ebb396d6e99ce48299a7795198854b359adc4f007381fcb160"}}