{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:QULWTFXXM4XUIRWQ7UMWP3F3FN","short_pith_number":"pith:QULWTFXX","canonical_record":{"source":{"id":"1309.1644","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-09-06T13:59:07Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"b17cec719dbcb4520b67bde0d8ef17365338275cf2d72b5d589f0bc111901812","abstract_canon_sha256":"f76cfc5c1d0d9fec1dd47573845bb8679068785a801c25fc3184f83124d87eed"},"schema_version":"1.0"},"canonical_sha256":"85176996f7672f4446d0fd1967ecbb2b51acbc11777cafe8f14c28a583338c97","source":{"kind":"arxiv","id":"1309.1644","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.1644","created_at":"2026-05-18T00:58:16Z"},{"alias_kind":"arxiv_version","alias_value":"1309.1644v2","created_at":"2026-05-18T00:58:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.1644","created_at":"2026-05-18T00:58:16Z"},{"alias_kind":"pith_short_12","alias_value":"QULWTFXXM4XU","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_16","alias_value":"QULWTFXXM4XUIRWQ","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_8","alias_value":"QULWTFXX","created_at":"2026-05-18T12:27:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:QULWTFXXM4XUIRWQ7UMWP3F3FN","target":"record","payload":{"canonical_record":{"source":{"id":"1309.1644","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-09-06T13:59:07Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"b17cec719dbcb4520b67bde0d8ef17365338275cf2d72b5d589f0bc111901812","abstract_canon_sha256":"f76cfc5c1d0d9fec1dd47573845bb8679068785a801c25fc3184f83124d87eed"},"schema_version":"1.0"},"canonical_sha256":"85176996f7672f4446d0fd1967ecbb2b51acbc11777cafe8f14c28a583338c97","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:58:16.881417Z","signature_b64":"9cfzRlwqYblTrVDi7iV3uGhzzQ4VNjAFO3FIUtxxUTWSbNHdBez0yw583WZ97k761a/Ht/U1KOCSgAXJUOSGDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"85176996f7672f4446d0fd1967ecbb2b51acbc11777cafe8f14c28a583338c97","last_reissued_at":"2026-05-18T00:58:16.880773Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:58:16.880773Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1309.1644","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":"2026-05-18T00:58:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o5Ni6HDEuC5PchCZylyOwY+W//2X8pN6szCBvk2zV4HpfMD/hH5/jIHYxlmJSrHbJ8d92FRx317dHyZ5mJA7Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T08:28:09.738190Z"},"content_sha256":"fc8272b23e0579e2a4b8edf0b86dbf78e62866c0ae473ee5c34a4baa32a072f1","schema_version":"1.0","event_id":"sha256:fc8272b23e0579e2a4b8edf0b86dbf78e62866c0ae473ee5c34a4baa32a072f1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:QULWTFXXM4XUIRWQ7UMWP3F3FN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Power Efficient MISO Beamforming for Secure Layered Transmission","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Derrick Wing Kwan Ng, Hussein Alnuweiri, Robert Schober","submitted_at":"2013-09-06T13:59:07Z","abstract_excerpt":"This paper studies secure layered video transmission in a multiuser multiple-input single-output (MISO) beamforming downlink communication system. The power allocation algorithm design is formulated as a non-convex optimization problem for minimizing the total transmit power while guaranteeing a minimum received signal-to-interference-plus-noise ratio (SINR) at the desired receiver. In particular, the proposed problem formulation takes into account the self-protecting architecture of layered transmission and artificial noise generation to prevent potential information eavesdropping. A semi-def"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.1644","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":""},"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":"2026-05-18T00:58:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VdrJwU5rz4n640JKNjpKviEPoyDLUyuxaR/XVuDkt7JoO4UogAgVDt19sRIXDiDTtPiswWiwa4uPPkcM01fbAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T08:28:09.738664Z"},"content_sha256":"755cc7454d421319120d3a7f9f77cf80f23757ba1c1f019d85cef907f9c532f4","schema_version":"1.0","event_id":"sha256:755cc7454d421319120d3a7f9f77cf80f23757ba1c1f019d85cef907f9c532f4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QULWTFXXM4XUIRWQ7UMWP3F3FN/bundle.json","state_url":"https://pith.science/pith/QULWTFXXM4XUIRWQ7UMWP3F3FN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QULWTFXXM4XUIRWQ7UMWP3F3FN/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":"2026-06-02T08:28:09Z","links":{"resolver":"https://pith.science/pith/QULWTFXXM4XUIRWQ7UMWP3F3FN","bundle":"https://pith.science/pith/QULWTFXXM4XUIRWQ7UMWP3F3FN/bundle.json","state":"https://pith.science/pith/QULWTFXXM4XUIRWQ7UMWP3F3FN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QULWTFXXM4XUIRWQ7UMWP3F3FN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:QULWTFXXM4XUIRWQ7UMWP3F3FN","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":"f76cfc5c1d0d9fec1dd47573845bb8679068785a801c25fc3184f83124d87eed","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-09-06T13:59:07Z","title_canon_sha256":"b17cec719dbcb4520b67bde0d8ef17365338275cf2d72b5d589f0bc111901812"},"schema_version":"1.0","source":{"id":"1309.1644","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.1644","created_at":"2026-05-18T00:58:16Z"},{"alias_kind":"arxiv_version","alias_value":"1309.1644v2","created_at":"2026-05-18T00:58:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.1644","created_at":"2026-05-18T00:58:16Z"},{"alias_kind":"pith_short_12","alias_value":"QULWTFXXM4XU","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_16","alias_value":"QULWTFXXM4XUIRWQ","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_8","alias_value":"QULWTFXX","created_at":"2026-05-18T12:27:57Z"}],"graph_snapshots":[{"event_id":"sha256:755cc7454d421319120d3a7f9f77cf80f23757ba1c1f019d85cef907f9c532f4","target":"graph","created_at":"2026-05-18T00:58:16Z","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 studies secure layered video transmission in a multiuser multiple-input single-output (MISO) beamforming downlink communication system. The power allocation algorithm design is formulated as a non-convex optimization problem for minimizing the total transmit power while guaranteeing a minimum received signal-to-interference-plus-noise ratio (SINR) at the desired receiver. In particular, the proposed problem formulation takes into account the self-protecting architecture of layered transmission and artificial noise generation to prevent potential information eavesdropping. A semi-def","authors_text":"Derrick Wing Kwan Ng, Hussein Alnuweiri, Robert Schober","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-09-06T13:59:07Z","title":"Power Efficient MISO Beamforming for Secure Layered Transmission"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.1644","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:fc8272b23e0579e2a4b8edf0b86dbf78e62866c0ae473ee5c34a4baa32a072f1","target":"record","created_at":"2026-05-18T00:58:16Z","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":"f76cfc5c1d0d9fec1dd47573845bb8679068785a801c25fc3184f83124d87eed","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-09-06T13:59:07Z","title_canon_sha256":"b17cec719dbcb4520b67bde0d8ef17365338275cf2d72b5d589f0bc111901812"},"schema_version":"1.0","source":{"id":"1309.1644","kind":"arxiv","version":2}},"canonical_sha256":"85176996f7672f4446d0fd1967ecbb2b51acbc11777cafe8f14c28a583338c97","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"85176996f7672f4446d0fd1967ecbb2b51acbc11777cafe8f14c28a583338c97","first_computed_at":"2026-05-18T00:58:16.880773Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:58:16.880773Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9cfzRlwqYblTrVDi7iV3uGhzzQ4VNjAFO3FIUtxxUTWSbNHdBez0yw583WZ97k761a/Ht/U1KOCSgAXJUOSGDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:58:16.881417Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.1644","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fc8272b23e0579e2a4b8edf0b86dbf78e62866c0ae473ee5c34a4baa32a072f1","sha256:755cc7454d421319120d3a7f9f77cf80f23757ba1c1f019d85cef907f9c532f4"],"state_sha256":"7e5ed6e9cfa554e4358c411512444b27ffe2ea8fdaaf4454aa3378b57de8b95e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0n1oXyzO+9sj9lW0Z5oW+PDFpTYuqUCWgtScJ9zAU+5hWYZIAx6u6X98Q8YftRVP8VYUs1Udv5gDZ3SdtNEXAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T08:28:09.740622Z","bundle_sha256":"cdc85e956dc2fbe556369d174ebfbba5335585d6a20fc538a4e737684ab016a5"}}