{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:7LCIS4S2ZN2RD4QSULLGIOLJNC","short_pith_number":"pith:7LCIS4S2","canonical_record":{"source":{"id":"1908.09244","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-08-25T02:48:51Z","cross_cats_sorted":["eess.SP","math.IT"],"title_canon_sha256":"9c0e45ac83008ab65897595d31b04d4e7dfd0f1b82bc7b4eca5d7193ee254b71","abstract_canon_sha256":"6915ada87c48ac8f2286e515cf11e4e90830cfb1aaeee3dfcaeec4a9fb41bb3d"},"schema_version":"1.0"},"canonical_sha256":"fac489725acb7511f212a2d6643969689ceb45f2bdcd79cee0118d0bc4d1af36","source":{"kind":"arxiv","id":"1908.09244","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.09244","created_at":"2026-07-05T01:00:13Z"},{"alias_kind":"arxiv_version","alias_value":"1908.09244v2","created_at":"2026-07-05T01:00:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.09244","created_at":"2026-07-05T01:00:13Z"},{"alias_kind":"pith_short_12","alias_value":"7LCIS4S2ZN2R","created_at":"2026-07-05T01:00:13Z"},{"alias_kind":"pith_short_16","alias_value":"7LCIS4S2ZN2RD4QS","created_at":"2026-07-05T01:00:13Z"},{"alias_kind":"pith_short_8","alias_value":"7LCIS4S2","created_at":"2026-07-05T01:00:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:7LCIS4S2ZN2RD4QSULLGIOLJNC","target":"record","payload":{"canonical_record":{"source":{"id":"1908.09244","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-08-25T02:48:51Z","cross_cats_sorted":["eess.SP","math.IT"],"title_canon_sha256":"9c0e45ac83008ab65897595d31b04d4e7dfd0f1b82bc7b4eca5d7193ee254b71","abstract_canon_sha256":"6915ada87c48ac8f2286e515cf11e4e90830cfb1aaeee3dfcaeec4a9fb41bb3d"},"schema_version":"1.0"},"canonical_sha256":"fac489725acb7511f212a2d6643969689ceb45f2bdcd79cee0118d0bc4d1af36","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:00:13.574510Z","signature_b64":"BvlPqu8QW7ObAO1ZyKhUPD7+2q2CgIub35aDThvwxR/IZjtCfi2YpEqv7wGJzglzK+FnqoyizsOLkfaEmrrWBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fac489725acb7511f212a2d6643969689ceb45f2bdcd79cee0118d0bc4d1af36","last_reissued_at":"2026-07-05T01:00:13.573961Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:00:13.573961Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.09244","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:00:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tkSdbk3IVQW1bZz/eS25lSnm9HX7xOdR8kEX5cOL7hTRi3xbm6kozsdn5LFGYwZ0VwP6tltgynU8rKeN/s/RAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T18:30:22.191300Z"},"content_sha256":"2ee57f0337044f03c025c2677c2ae80e2b780b3cb16a1eb5f79f0ea8658ef0ca","schema_version":"1.0","event_id":"sha256:2ee57f0337044f03c025c2677c2ae80e2b780b3cb16a1eb5f79f0ea8658ef0ca"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:7LCIS4S2ZN2RD4QSULLGIOLJNC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Two High-Performance Amplitude Beamforming Schemes for Secure Precise Communication and Jamming with Phase Alignment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.SP","math.IT"],"primary_cat":"cs.IT","authors_text":"Feng Shu, Lingling Zhu, Tong Shen","submitted_at":"2019-08-25T02:48:51Z","abstract_excerpt":"To severely weaken the eavesdropper's ability to intercept confidential message (CM), a precise jamming (PJ) idea is proposed by making use of the concept of secure precise wireless transmission (SPWT). Its basic idea is to focus the transmit energy of artificial noise (AN) onto the neighborhood of eavesdropper (Eve) by using random subcarrier selection (RSS), directional modulation, phase alignment (PA), and amplitude beamforming (AB). By doing so, Eve will be seriously interfered with AN. Here, the conventional joint optimization of phase and amplitude is converted into two independent phase"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.09244","kind":"arxiv","version":2},"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/1908.09244/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":"2026-07-05T01:00:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ymR/47LeUeFvBzVqHJG4ypCq8qXdm6zblUYLW5c6n7rL1tu/nsL2mQjBqB/mAAGlTfgnXLOvaabzn2sZk/jJDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T18:30:22.192413Z"},"content_sha256":"198b0b881484ceadc06bc39623015dbe67248470f959a6d422ed0ea3be3004c8","schema_version":"1.0","event_id":"sha256:198b0b881484ceadc06bc39623015dbe67248470f959a6d422ed0ea3be3004c8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7LCIS4S2ZN2RD4QSULLGIOLJNC/bundle.json","state_url":"https://pith.science/pith/7LCIS4S2ZN2RD4QSULLGIOLJNC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7LCIS4S2ZN2RD4QSULLGIOLJNC/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":"2026-08-16T18:30:22Z","links":{"resolver":"https://pith.science/pith/7LCIS4S2ZN2RD4QSULLGIOLJNC","bundle":"https://pith.science/pith/7LCIS4S2ZN2RD4QSULLGIOLJNC/bundle.json","state":"https://pith.science/pith/7LCIS4S2ZN2RD4QSULLGIOLJNC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7LCIS4S2ZN2RD4QSULLGIOLJNC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:7LCIS4S2ZN2RD4QSULLGIOLJNC","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":"6915ada87c48ac8f2286e515cf11e4e90830cfb1aaeee3dfcaeec4a9fb41bb3d","cross_cats_sorted":["eess.SP","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-08-25T02:48:51Z","title_canon_sha256":"9c0e45ac83008ab65897595d31b04d4e7dfd0f1b82bc7b4eca5d7193ee254b71"},"schema_version":"1.0","source":{"id":"1908.09244","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.09244","created_at":"2026-07-05T01:00:13Z"},{"alias_kind":"arxiv_version","alias_value":"1908.09244v2","created_at":"2026-07-05T01:00:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.09244","created_at":"2026-07-05T01:00:13Z"},{"alias_kind":"pith_short_12","alias_value":"7LCIS4S2ZN2R","created_at":"2026-07-05T01:00:13Z"},{"alias_kind":"pith_short_16","alias_value":"7LCIS4S2ZN2RD4QS","created_at":"2026-07-05T01:00:13Z"},{"alias_kind":"pith_short_8","alias_value":"7LCIS4S2","created_at":"2026-07-05T01:00:13Z"}],"graph_snapshots":[{"event_id":"sha256:198b0b881484ceadc06bc39623015dbe67248470f959a6d422ed0ea3be3004c8","target":"graph","created_at":"2026-07-05T01:00:13Z","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/1908.09244/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"To severely weaken the eavesdropper's ability to intercept confidential message (CM), a precise jamming (PJ) idea is proposed by making use of the concept of secure precise wireless transmission (SPWT). Its basic idea is to focus the transmit energy of artificial noise (AN) onto the neighborhood of eavesdropper (Eve) by using random subcarrier selection (RSS), directional modulation, phase alignment (PA), and amplitude beamforming (AB). By doing so, Eve will be seriously interfered with AN. Here, the conventional joint optimization of phase and amplitude is converted into two independent phase","authors_text":"Feng Shu, Lingling Zhu, Tong Shen","cross_cats":["eess.SP","math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-08-25T02:48:51Z","title":"Two High-Performance Amplitude Beamforming Schemes for Secure Precise Communication and Jamming with Phase Alignment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.09244","kind":"arxiv","version":2},"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":"sha256:2ee57f0337044f03c025c2677c2ae80e2b780b3cb16a1eb5f79f0ea8658ef0ca","target":"record","created_at":"2026-07-05T01:00:13Z","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":"6915ada87c48ac8f2286e515cf11e4e90830cfb1aaeee3dfcaeec4a9fb41bb3d","cross_cats_sorted":["eess.SP","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-08-25T02:48:51Z","title_canon_sha256":"9c0e45ac83008ab65897595d31b04d4e7dfd0f1b82bc7b4eca5d7193ee254b71"},"schema_version":"1.0","source":{"id":"1908.09244","kind":"arxiv","version":2}},"canonical_sha256":"fac489725acb7511f212a2d6643969689ceb45f2bdcd79cee0118d0bc4d1af36","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fac489725acb7511f212a2d6643969689ceb45f2bdcd79cee0118d0bc4d1af36","first_computed_at":"2026-07-05T01:00:13.573961Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:00:13.573961Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BvlPqu8QW7ObAO1ZyKhUPD7+2q2CgIub35aDThvwxR/IZjtCfi2YpEqv7wGJzglzK+FnqoyizsOLkfaEmrrWBA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:00:13.574510Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.09244","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2ee57f0337044f03c025c2677c2ae80e2b780b3cb16a1eb5f79f0ea8658ef0ca","sha256:198b0b881484ceadc06bc39623015dbe67248470f959a6d422ed0ea3be3004c8"],"state_sha256":"26b1764ac574c2f6e86b59fe9750d817e3e3c935bbeb0a5a7138b30d9d88bacb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Sg46S5rOHKpfAyMLuvmoyBrrdCBfT7V5nE9N/Pqwt7yoRZu/eRiSqBIXnd1/1NUj/oItxtnPwN1sLF3+2S6IBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T18:30:22.198611Z","bundle_sha256":"637fff9a82dc6ab051bc8a2b3466296a17e8db47a7f4e217f4fb4765f60a117e"}}