{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:BUZ4VVIIXZ5KOPRI4O365ANPDR","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":"c09894c777f56e757b983454c5f73eed32051761e8ca6a5a2f63b0fb55c7e6d5","cross_cats_sorted":["cs.CR","math.IT"],"license":"","primary_cat":"cs.IT","submitted_at":"2004-11-02T10:21:59Z","title_canon_sha256":"89c8048fbf9b42046fa175a5c0855142e0f956d0e2d4ef5f2dc386e85d418772"},"schema_version":"1.0","source":{"id":"cs/0411003","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cs/0411003","created_at":"2026-07-04T15:02:44Z"},{"alias_kind":"arxiv_version","alias_value":"cs/0411003v3","created_at":"2026-07-04T15:02:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cs/0411003","created_at":"2026-07-04T15:02:44Z"},{"alias_kind":"pith_short_12","alias_value":"BUZ4VVIIXZ5K","created_at":"2026-07-04T15:02:44Z"},{"alias_kind":"pith_short_16","alias_value":"BUZ4VVIIXZ5KOPRI","created_at":"2026-07-04T15:02:44Z"},{"alias_kind":"pith_short_8","alias_value":"BUZ4VVII","created_at":"2026-07-04T15:02:44Z"}],"graph_snapshots":[{"event_id":"sha256:a43869eaf8e81399c4934b8e3ece0707a74d69f9c57c047b397bffb9e2a57d02","target":"graph","created_at":"2026-07-04T15:02:44Z","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/cs/0411003/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"With the advent of quantum key distribution (QKD) systems, perfect (i.e. information-theoretic) security can now be achieved for distribution of a cryptographic key. QKD systems and similar protocols use classical error-correcting codes for both error correction (for the honest parties to correct errors) and privacy amplification (to make an eavesdropper fully ignorant). From a coding perspective, a good model that corresponds to such a setting is the wire tap channel introduced by Wyner in 1975. In this paper, we study fundamental limits and coding methods for wire tap channels. We provide an","authors_text":"Andrew Thangaraj, A. R. Calderbank, Jean-Marc Merolla, Souvik Dihidar, Steven McLaughlin","cross_cats":["cs.CR","math.IT"],"headline":"","license":"","primary_cat":"cs.IT","submitted_at":"2004-11-02T10:21:59Z","title":"Applications of LDPC Codes to the Wiretap Channel"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cs/0411003","kind":"arxiv","version":3},"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":"sha256:4ef7ed3b4022068320a7b7ad96b20038fcb2045e77a13d65a1505cc239b79646","target":"record","created_at":"2026-07-04T15:02:44Z","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":"c09894c777f56e757b983454c5f73eed32051761e8ca6a5a2f63b0fb55c7e6d5","cross_cats_sorted":["cs.CR","math.IT"],"license":"","primary_cat":"cs.IT","submitted_at":"2004-11-02T10:21:59Z","title_canon_sha256":"89c8048fbf9b42046fa175a5c0855142e0f956d0e2d4ef5f2dc386e85d418772"},"schema_version":"1.0","source":{"id":"cs/0411003","kind":"arxiv","version":3}},"canonical_sha256":"0d33cad508be7aa73e28e3b7ee81af1c7324ab0f14e40ff1fbdbf003417da71d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0d33cad508be7aa73e28e3b7ee81af1c7324ab0f14e40ff1fbdbf003417da71d","first_computed_at":"2026-07-04T15:02:44.729251Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:02:44.729251Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LKqUpVB11n6gS6H48mXOXExyz8B8keU3+Hgw+6mMy0857x+HO9Qq1j7SbxuFKTolvzk7uQbNnPoIkzXpizgMBQ==","signature_status":"signed_v1","signed_at":"2026-07-04T15:02:44.729684Z","signed_message":"canonical_sha256_bytes"},"source_id":"cs/0411003","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4ef7ed3b4022068320a7b7ad96b20038fcb2045e77a13d65a1505cc239b79646","sha256:a43869eaf8e81399c4934b8e3ece0707a74d69f9c57c047b397bffb9e2a57d02"],"state_sha256":"3143ad9c9bf958da398546a4f4f05241f5c3262947dbd3bb3d1f09f3feb309d8"}