{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:SQ7HUCEX3VA2WADRVAG64B2CLQ","short_pith_number":"pith:SQ7HUCEX","canonical_record":{"source":{"id":"1504.02980","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-04-12T15:15:57Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"2d18524d20f857d4ab270a6cbb44cd256c1b2f23a40fdefd7a876984a0a8b10d","abstract_canon_sha256":"0bf1b039c628f62540fc36cfd79c93bffca87a54f42d209919aea753c7960616"},"schema_version":"1.0"},"canonical_sha256":"943e7a0897dd41ab0071a80dee07425c1e2422b750a3bad4f7413438066363e4","source":{"kind":"arxiv","id":"1504.02980","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.02980","created_at":"2026-05-18T00:57:50Z"},{"alias_kind":"arxiv_version","alias_value":"1504.02980v1","created_at":"2026-05-18T00:57:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.02980","created_at":"2026-05-18T00:57:50Z"},{"alias_kind":"pith_short_12","alias_value":"SQ7HUCEX3VA2","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"SQ7HUCEX3VA2WADR","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"SQ7HUCEX","created_at":"2026-05-18T12:29:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:SQ7HUCEX3VA2WADRVAG64B2CLQ","target":"record","payload":{"canonical_record":{"source":{"id":"1504.02980","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-04-12T15:15:57Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"2d18524d20f857d4ab270a6cbb44cd256c1b2f23a40fdefd7a876984a0a8b10d","abstract_canon_sha256":"0bf1b039c628f62540fc36cfd79c93bffca87a54f42d209919aea753c7960616"},"schema_version":"1.0"},"canonical_sha256":"943e7a0897dd41ab0071a80dee07425c1e2422b750a3bad4f7413438066363e4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:57:50.758715Z","signature_b64":"4cVURoifVN4HwbS96tnpj//mwX+rDSg9mdtHMfj9/nqyoZ2mwLu707jJyF8wQ26CAS9TzHw0hEPVX5jf+DIeAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"943e7a0897dd41ab0071a80dee07425c1e2422b750a3bad4f7413438066363e4","last_reissued_at":"2026-05-18T00:57:50.758076Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:57:50.758076Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.02980","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":"2026-05-18T00:57:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SebP1IlnjBi++IPhY7D8e2pgNw1QdzQpQHcNzy6WhkbF3HpNq7o4Ys8Y5gNFHkpd7d8RGeQWcy80nnbBK2dWAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T22:37:28.696955Z"},"content_sha256":"b433d068016d8c67a69640bcf736484bcc892fd74a89529c9894c46fcb51f0ff","schema_version":"1.0","event_id":"sha256:b433d068016d8c67a69640bcf736484bcc892fd74a89529c9894c46fcb51f0ff"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:SQ7HUCEX3VA2WADRVAG64B2CLQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Multi-Antenna Relay Aided Wireless Physical Layer Security","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Caijun Zhong, Chau Yuen, Hsiao-Hwa Chen, Xiaoming Chen","submitted_at":"2015-04-12T15:15:57Z","abstract_excerpt":"With growing popularity of mobile Internet, providing secure wireless services has become a critical issue. Physical layer security (PHY-security) has been recognized as an effective means to enhance wireless security by exploiting wireless medium characteristics, e.g., fading, noise, and interference. A particularly interesting PHY-security technology is cooperative relay due to the fact that it helps to provide distributed diversity and shorten access distance. This article offers a tutorial on various multi-antenna relaying technologies to improve security at physical layer. The state of th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.02980","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":"2026-05-18T00:57:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GBBBq3mPfLozclNYlwVRvWLVbJJokgGAzdQ4icRZN/E8iEm1oHS7XqWZ8648mXKo0DQg39SU5U6rA8bLOpc8Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T22:37:28.697299Z"},"content_sha256":"651cef1e7b5c0e6640a5ad2440ee9e4ce7bd214e22d8449447d6da364a5efe86","schema_version":"1.0","event_id":"sha256:651cef1e7b5c0e6640a5ad2440ee9e4ce7bd214e22d8449447d6da364a5efe86"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SQ7HUCEX3VA2WADRVAG64B2CLQ/bundle.json","state_url":"https://pith.science/pith/SQ7HUCEX3VA2WADRVAG64B2CLQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SQ7HUCEX3VA2WADRVAG64B2CLQ/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":"2026-06-03T22:37:28Z","links":{"resolver":"https://pith.science/pith/SQ7HUCEX3VA2WADRVAG64B2CLQ","bundle":"https://pith.science/pith/SQ7HUCEX3VA2WADRVAG64B2CLQ/bundle.json","state":"https://pith.science/pith/SQ7HUCEX3VA2WADRVAG64B2CLQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SQ7HUCEX3VA2WADRVAG64B2CLQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:SQ7HUCEX3VA2WADRVAG64B2CLQ","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":"0bf1b039c628f62540fc36cfd79c93bffca87a54f42d209919aea753c7960616","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-04-12T15:15:57Z","title_canon_sha256":"2d18524d20f857d4ab270a6cbb44cd256c1b2f23a40fdefd7a876984a0a8b10d"},"schema_version":"1.0","source":{"id":"1504.02980","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.02980","created_at":"2026-05-18T00:57:50Z"},{"alias_kind":"arxiv_version","alias_value":"1504.02980v1","created_at":"2026-05-18T00:57:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.02980","created_at":"2026-05-18T00:57:50Z"},{"alias_kind":"pith_short_12","alias_value":"SQ7HUCEX3VA2","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"SQ7HUCEX3VA2WADR","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"SQ7HUCEX","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:651cef1e7b5c0e6640a5ad2440ee9e4ce7bd214e22d8449447d6da364a5efe86","target":"graph","created_at":"2026-05-18T00:57:50Z","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":"With growing popularity of mobile Internet, providing secure wireless services has become a critical issue. Physical layer security (PHY-security) has been recognized as an effective means to enhance wireless security by exploiting wireless medium characteristics, e.g., fading, noise, and interference. A particularly interesting PHY-security technology is cooperative relay due to the fact that it helps to provide distributed diversity and shorten access distance. This article offers a tutorial on various multi-antenna relaying technologies to improve security at physical layer. The state of th","authors_text":"Caijun Zhong, Chau Yuen, Hsiao-Hwa Chen, Xiaoming Chen","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-04-12T15:15:57Z","title":"Multi-Antenna Relay Aided Wireless Physical Layer Security"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.02980","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:b433d068016d8c67a69640bcf736484bcc892fd74a89529c9894c46fcb51f0ff","target":"record","created_at":"2026-05-18T00:57:50Z","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":"0bf1b039c628f62540fc36cfd79c93bffca87a54f42d209919aea753c7960616","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-04-12T15:15:57Z","title_canon_sha256":"2d18524d20f857d4ab270a6cbb44cd256c1b2f23a40fdefd7a876984a0a8b10d"},"schema_version":"1.0","source":{"id":"1504.02980","kind":"arxiv","version":1}},"canonical_sha256":"943e7a0897dd41ab0071a80dee07425c1e2422b750a3bad4f7413438066363e4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"943e7a0897dd41ab0071a80dee07425c1e2422b750a3bad4f7413438066363e4","first_computed_at":"2026-05-18T00:57:50.758076Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:57:50.758076Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4cVURoifVN4HwbS96tnpj//mwX+rDSg9mdtHMfj9/nqyoZ2mwLu707jJyF8wQ26CAS9TzHw0hEPVX5jf+DIeAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:57:50.758715Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.02980","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b433d068016d8c67a69640bcf736484bcc892fd74a89529c9894c46fcb51f0ff","sha256:651cef1e7b5c0e6640a5ad2440ee9e4ce7bd214e22d8449447d6da364a5efe86"],"state_sha256":"4976e942eea1c30aa7cf31f4665c985faefe8af1f7a9021da8e975c5bce186f8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cRhghpVsUczgDpZ9yPZgx/8etG9ivwmLO/67UfJoSwvAB1kHjF58MYfNyLgBkX94HoC3M8poK+hPkaEF5bi5Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T22:37:28.699301Z","bundle_sha256":"00d4174bf4d0a75884d39525af947a6499756f5d7c6b337b2a9a961efbb7f6da"}}