{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:RBVNX2IOOCZRWJMGT34V3VFJXT","short_pith_number":"pith:RBVNX2IO","canonical_record":{"source":{"id":"2501.03301","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2025-01-06T15:19:26Z","cross_cats_sorted":["cs.AI","cs.DC","cs.LG"],"title_canon_sha256":"e60a5d16ddb5e2a84b42431da935a5ded5c9af212995ae65ca2de6ec09b93c3b","abstract_canon_sha256":"1a1c872505c4a72ccb5ed8a3d67df93be9f14763730743f008692015afb5ab6e"},"schema_version":"1.0"},"canonical_sha256":"886adbe90e70b31b25869ef95dd4a9bcfea524b1d26a564c4a25316a2f5c0d73","source":{"kind":"arxiv","id":"2501.03301","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.03301","created_at":"2026-07-05T09:58:28Z"},{"alias_kind":"arxiv_version","alias_value":"2501.03301v2","created_at":"2026-07-05T09:58:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.03301","created_at":"2026-07-05T09:58:28Z"},{"alias_kind":"pith_short_12","alias_value":"RBVNX2IOOCZR","created_at":"2026-07-05T09:58:28Z"},{"alias_kind":"pith_short_16","alias_value":"RBVNX2IOOCZRWJMG","created_at":"2026-07-05T09:58:28Z"},{"alias_kind":"pith_short_8","alias_value":"RBVNX2IO","created_at":"2026-07-05T09:58:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:RBVNX2IOOCZRWJMGT34V3VFJXT","target":"record","payload":{"canonical_record":{"source":{"id":"2501.03301","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2025-01-06T15:19:26Z","cross_cats_sorted":["cs.AI","cs.DC","cs.LG"],"title_canon_sha256":"e60a5d16ddb5e2a84b42431da935a5ded5c9af212995ae65ca2de6ec09b93c3b","abstract_canon_sha256":"1a1c872505c4a72ccb5ed8a3d67df93be9f14763730743f008692015afb5ab6e"},"schema_version":"1.0"},"canonical_sha256":"886adbe90e70b31b25869ef95dd4a9bcfea524b1d26a564c4a25316a2f5c0d73","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:58:28.011386Z","signature_b64":"nLJhvRUGEyLATwBE13aPO1ZRLLfVIDdU53EZ1mIY0FZ4kuhWJtne2To9okfz1LcppMDQ2lxyjhdIPgBBIrkBDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"886adbe90e70b31b25869ef95dd4a9bcfea524b1d26a564c4a25316a2f5c0d73","last_reissued_at":"2026-07-05T09:58:28.010912Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:58:28.010912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2501.03301","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":"2026-07-05T09:58:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zhleLlCYDIhKlSBCjOxlAOvUQyf2AuHpBke5Dv6CVbOFCsjXlISqRXigug8P5ZUgek4LiIIDQWkzVCg5t4fSBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T06:15:05.166800Z"},"content_sha256":"9bc51899df343922ddc77a7c4c4d60eb2a47dcb0cb045ab9c0320526999e17dc","schema_version":"1.0","event_id":"sha256:9bc51899df343922ddc77a7c4c4d60eb2a47dcb0cb045ab9c0320526999e17dc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:RBVNX2IOOCZRWJMGT34V3VFJXT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Rethinking Byzantine Robustness in Federated Recommendation from Sparse Aggregation Perspective","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.AI","cs.DC","cs.LG"],"primary_cat":"cs.CR","authors_text":"Bo Yan, Chuan Shi, Junping Du, Lingjuan Lyu, Mengmei Zhang, Xiao Wang, Zhongjian Zhang","submitted_at":"2025-01-06T15:19:26Z","abstract_excerpt":"To preserve user privacy in recommender systems, federated recommendation (FR) based on federated learning (FL) emerges, keeping the personal data on the local client and updating a model collaboratively. Unlike FL, FR has a unique sparse aggregation mechanism, where the embedding of each item is updated by only partial clients, instead of full clients in a dense aggregation of general FL. Recently, as an essential principle of FL, model security has received increasing attention, especially for Byzantine attacks, where malicious clients can send arbitrary updates. The problem of exploring the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.03301","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/2501.03301/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":"2026-07-05T09:58:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2PrjQsiizKxxjuUeWgHCaht+/ROtCAUpFopPIRXdguBUluEWYLS4/o8XvaUm+0kzT0CzgzQ0dV6y7J+Wez+3Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T06:15:05.167297Z"},"content_sha256":"a320df779acf0410cd326074239906938eed9a6412ca78fa13639bf917707c31","schema_version":"1.0","event_id":"sha256:a320df779acf0410cd326074239906938eed9a6412ca78fa13639bf917707c31"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RBVNX2IOOCZRWJMGT34V3VFJXT/bundle.json","state_url":"https://pith.science/pith/RBVNX2IOOCZRWJMGT34V3VFJXT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RBVNX2IOOCZRWJMGT34V3VFJXT/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":"2026-08-06T06:15:05Z","links":{"resolver":"https://pith.science/pith/RBVNX2IOOCZRWJMGT34V3VFJXT","bundle":"https://pith.science/pith/RBVNX2IOOCZRWJMGT34V3VFJXT/bundle.json","state":"https://pith.science/pith/RBVNX2IOOCZRWJMGT34V3VFJXT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RBVNX2IOOCZRWJMGT34V3VFJXT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:RBVNX2IOOCZRWJMGT34V3VFJXT","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":"1a1c872505c4a72ccb5ed8a3d67df93be9f14763730743f008692015afb5ab6e","cross_cats_sorted":["cs.AI","cs.DC","cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2025-01-06T15:19:26Z","title_canon_sha256":"e60a5d16ddb5e2a84b42431da935a5ded5c9af212995ae65ca2de6ec09b93c3b"},"schema_version":"1.0","source":{"id":"2501.03301","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.03301","created_at":"2026-07-05T09:58:28Z"},{"alias_kind":"arxiv_version","alias_value":"2501.03301v2","created_at":"2026-07-05T09:58:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.03301","created_at":"2026-07-05T09:58:28Z"},{"alias_kind":"pith_short_12","alias_value":"RBVNX2IOOCZR","created_at":"2026-07-05T09:58:28Z"},{"alias_kind":"pith_short_16","alias_value":"RBVNX2IOOCZRWJMG","created_at":"2026-07-05T09:58:28Z"},{"alias_kind":"pith_short_8","alias_value":"RBVNX2IO","created_at":"2026-07-05T09:58:28Z"}],"graph_snapshots":[{"event_id":"sha256:a320df779acf0410cd326074239906938eed9a6412ca78fa13639bf917707c31","target":"graph","created_at":"2026-07-05T09:58:28Z","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/2501.03301/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"To preserve user privacy in recommender systems, federated recommendation (FR) based on federated learning (FL) emerges, keeping the personal data on the local client and updating a model collaboratively. Unlike FL, FR has a unique sparse aggregation mechanism, where the embedding of each item is updated by only partial clients, instead of full clients in a dense aggregation of general FL. Recently, as an essential principle of FL, model security has received increasing attention, especially for Byzantine attacks, where malicious clients can send arbitrary updates. The problem of exploring the","authors_text":"Bo Yan, Chuan Shi, Junping Du, Lingjuan Lyu, Mengmei Zhang, Xiao Wang, Zhongjian Zhang","cross_cats":["cs.AI","cs.DC","cs.LG"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2025-01-06T15:19:26Z","title":"Rethinking Byzantine Robustness in Federated Recommendation from Sparse Aggregation Perspective"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.03301","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":"sha256:9bc51899df343922ddc77a7c4c4d60eb2a47dcb0cb045ab9c0320526999e17dc","target":"record","created_at":"2026-07-05T09:58:28Z","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":"1a1c872505c4a72ccb5ed8a3d67df93be9f14763730743f008692015afb5ab6e","cross_cats_sorted":["cs.AI","cs.DC","cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2025-01-06T15:19:26Z","title_canon_sha256":"e60a5d16ddb5e2a84b42431da935a5ded5c9af212995ae65ca2de6ec09b93c3b"},"schema_version":"1.0","source":{"id":"2501.03301","kind":"arxiv","version":2}},"canonical_sha256":"886adbe90e70b31b25869ef95dd4a9bcfea524b1d26a564c4a25316a2f5c0d73","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"886adbe90e70b31b25869ef95dd4a9bcfea524b1d26a564c4a25316a2f5c0d73","first_computed_at":"2026-07-05T09:58:28.010912Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:58:28.010912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nLJhvRUGEyLATwBE13aPO1ZRLLfVIDdU53EZ1mIY0FZ4kuhWJtne2To9okfz1LcppMDQ2lxyjhdIPgBBIrkBDw==","signature_status":"signed_v1","signed_at":"2026-07-05T09:58:28.011386Z","signed_message":"canonical_sha256_bytes"},"source_id":"2501.03301","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9bc51899df343922ddc77a7c4c4d60eb2a47dcb0cb045ab9c0320526999e17dc","sha256:a320df779acf0410cd326074239906938eed9a6412ca78fa13639bf917707c31"],"state_sha256":"960eaa0ca40523ab19b057436156b9bba58923d1237fd77f258ab2d72ce1f3d4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FfuK3B2zp60vJKVJoWy4zO3DIUpiINk1cjpMUzA6HI9p6WOnmOcfyihapQWZr6LnTsX5kVrTFu0hGOnJllzmDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T06:15:05.171031Z","bundle_sha256":"e2bfc25d2c752f7aba81e40379685f56c139215952ef1fcb24e61f797d8ce138"}}