{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:NAI5UKLGXGWZF5537CASJN4VRS","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":"7ad7ca5999b76477e24c054c22f9bf4b7c95aff05a41de3ebd67ca2a0ef8ea5d","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-04-26T08:22:52Z","title_canon_sha256":"65e36bfe7cb5e3be18caa1b565da24d240c33860b3b24b452d3cbdffc74aafdf"},"schema_version":"1.0","source":{"id":"1704.08007","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.08007","created_at":"2026-05-18T00:45:31Z"},{"alias_kind":"arxiv_version","alias_value":"1704.08007v1","created_at":"2026-05-18T00:45:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.08007","created_at":"2026-05-18T00:45:31Z"},{"alias_kind":"pith_short_12","alias_value":"NAI5UKLGXGWZ","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_16","alias_value":"NAI5UKLGXGWZF553","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_8","alias_value":"NAI5UKLG","created_at":"2026-05-18T12:31:31Z"}],"graph_snapshots":[{"event_id":"sha256:88b553a3323938f403d2cfcc9e2ed15173b2b5cadb6f64a9e382422cfa927326","target":"graph","created_at":"2026-05-18T00:45:31Z","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":"Physical layer security has been considered as an important security approach in wireless communications to protect legitimate transmission from passive eavesdroppers. This paper investigates the physical layer security of a wireless multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) communication system in the presence of a multiple-antenna eavesdropper. We first propose a transmit-filter-assisted secure MIMO-OFDM system which can destroy the orthogonality of eavesdropper's signals. Our proposed transmit filter can disturb the reception of eavesdropper whi","authors_text":"Ming Li, Qian Liu, Wenfei Liu, Xiaowen Tian, Zihuan Wang","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-04-26T08:22:52Z","title":"Transmit Filter and Artificial Noise Design for Secure MIMO-OFDM Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.08007","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":"sha256:80de81dbfc42e3a9967851b5a46e636a6e82ec0952803c15cd66319b8bf69a09","target":"record","created_at":"2026-05-18T00:45:31Z","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":"7ad7ca5999b76477e24c054c22f9bf4b7c95aff05a41de3ebd67ca2a0ef8ea5d","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-04-26T08:22:52Z","title_canon_sha256":"65e36bfe7cb5e3be18caa1b565da24d240c33860b3b24b452d3cbdffc74aafdf"},"schema_version":"1.0","source":{"id":"1704.08007","kind":"arxiv","version":1}},"canonical_sha256":"6811da2966b9ad92f7bbf88124b7958ca4349b2d7faceb5096495bf242e355b7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6811da2966b9ad92f7bbf88124b7958ca4349b2d7faceb5096495bf242e355b7","first_computed_at":"2026-05-18T00:45:31.284018Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:45:31.284018Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1GH+9xRaRg+X2GWxVjt1tCZLmv9FpTyIkje96TCIZvQtupx/lXihHOJJ+V4jQUpHDpS+X3bt1AZvQsac8PBJDw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:45:31.284416Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.08007","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:80de81dbfc42e3a9967851b5a46e636a6e82ec0952803c15cd66319b8bf69a09","sha256:88b553a3323938f403d2cfcc9e2ed15173b2b5cadb6f64a9e382422cfa927326"],"state_sha256":"d097a1720aff058012d03ec46f0be3b31953794c3595afa0f4d7b00f445391b6"}