{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:XY4LSCFHWYRIPMLBYHMSSMW4DM","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":"435940524b201a435e593424d8ea6a644b867789e0ab8514bfaabc9404d77fd3","cross_cats_sorted":["cs.DB","cs.IR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2026-06-18T01:40:36Z","title_canon_sha256":"a6a96695144606ac7867663e20ac8d1b8f3f6249a8a5018c71bd15e2096e869b"},"schema_version":"1.0","source":{"id":"2606.19692","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.19692","created_at":"2026-06-19T16:12:32Z"},{"alias_kind":"arxiv_version","alias_value":"2606.19692v1","created_at":"2026-06-19T16:12:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.19692","created_at":"2026-06-19T16:12:32Z"},{"alias_kind":"pith_short_12","alias_value":"XY4LSCFHWYRI","created_at":"2026-06-19T16:12:32Z"},{"alias_kind":"pith_short_16","alias_value":"XY4LSCFHWYRIPMLB","created_at":"2026-06-19T16:12:32Z"},{"alias_kind":"pith_short_8","alias_value":"XY4LSCFH","created_at":"2026-06-19T16:12:32Z"}],"graph_snapshots":[{"event_id":"sha256:0425ef25e5cd6a89120aec0140c7db6f56573269dadb541d36804de528944162","target":"graph","created_at":"2026-06-19T16:12:32Z","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/2606.19692/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Vector hubness, where a few points become nearest neighbors of many queries, creates a poisoning risk in retrieval-augmented generation (RAG): one injected document can influence unrelated requests. Existing defenses use periodic reverse-kNN scans, leaving an exposure window and repeated corpus-wide work. We study admission-time control, scoring each candidate against sentinel queries and quarantining hub-like documents before insertion. Across two 100,000-document corpora, five encoders, and disjoint attacker and defender query sets, a global gate achieves recall 1.0 at the decisive embedding","authors_text":"Prashant Kumar Pathak, Tarun Kumar Sharma","cross_cats":["cs.DB","cs.IR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2026-06-18T01:40:36Z","title":"When Global Gating Is Enough: Admission-Time Hubness Control in Anisotropic Vector Retrieval Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.19692","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:c500a228991548ad3503560fccce254cd1106804c1194a1758302c9dbbd05c30","target":"record","created_at":"2026-06-19T16:12:32Z","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":"435940524b201a435e593424d8ea6a644b867789e0ab8514bfaabc9404d77fd3","cross_cats_sorted":["cs.DB","cs.IR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2026-06-18T01:40:36Z","title_canon_sha256":"a6a96695144606ac7867663e20ac8d1b8f3f6249a8a5018c71bd15e2096e869b"},"schema_version":"1.0","source":{"id":"2606.19692","kind":"arxiv","version":1}},"canonical_sha256":"be38b908a7b62287b161c1d92932dc1b35a38044bfe2f720079d9418c2ec7771","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"be38b908a7b62287b161c1d92932dc1b35a38044bfe2f720079d9418c2ec7771","first_computed_at":"2026-06-19T16:12:32.300520Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-19T16:12:32.300520Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GrdnoghSBYZygUrRMhBkbr+cX+75iL+78295DF1l4uYwSdPE0dLypzm6X+C8sxpGQODmUSxs+1Wa0tAXS/edBg==","signature_status":"signed_v1","signed_at":"2026-06-19T16:12:32.300945Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.19692","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c500a228991548ad3503560fccce254cd1106804c1194a1758302c9dbbd05c30","sha256:0425ef25e5cd6a89120aec0140c7db6f56573269dadb541d36804de528944162"],"state_sha256":"a13310558ad8ea14bf8ea8053d1320c45fe6409c2d449139b4c1dcb4a77a6f82"}