{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:S2RXFF3ZSBBAGBXIQSCQUSKM4G","short_pith_number":"pith:S2RXFF3Z","canonical_record":{"source":{"id":"2607.01702","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CR","submitted_at":"2026-07-02T04:51:27Z","cross_cats_sorted":["cs.AI","cs.SD"],"title_canon_sha256":"acab2894fc4fed9f1003489faa3b3f35fb562f4074acb990c3f30f6ef886b15a","abstract_canon_sha256":"2785f5ebb1f6b691a8e017bf0390a2b0cef241a736ffee7e593c22d212f0b0f5"},"schema_version":"1.0"},"canonical_sha256":"96a372977990420306e884850a494ce1b690488c667a73c7993c37abe5fead8c","source":{"kind":"arxiv","id":"2607.01702","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.01702","created_at":"2026-07-03T01:17:27Z"},{"alias_kind":"arxiv_version","alias_value":"2607.01702v1","created_at":"2026-07-03T01:17:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.01702","created_at":"2026-07-03T01:17:27Z"},{"alias_kind":"pith_short_12","alias_value":"S2RXFF3ZSBBA","created_at":"2026-07-03T01:17:27Z"},{"alias_kind":"pith_short_16","alias_value":"S2RXFF3ZSBBAGBXI","created_at":"2026-07-03T01:17:27Z"},{"alias_kind":"pith_short_8","alias_value":"S2RXFF3Z","created_at":"2026-07-03T01:17:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:S2RXFF3ZSBBAGBXIQSCQUSKM4G","target":"record","payload":{"canonical_record":{"source":{"id":"2607.01702","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CR","submitted_at":"2026-07-02T04:51:27Z","cross_cats_sorted":["cs.AI","cs.SD"],"title_canon_sha256":"acab2894fc4fed9f1003489faa3b3f35fb562f4074acb990c3f30f6ef886b15a","abstract_canon_sha256":"2785f5ebb1f6b691a8e017bf0390a2b0cef241a736ffee7e593c22d212f0b0f5"},"schema_version":"1.0"},"canonical_sha256":"96a372977990420306e884850a494ce1b690488c667a73c7993c37abe5fead8c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-03T01:17:27.211015Z","signature_b64":"Ws6Vq/XzTfyr5S7X2WmvwS0j92hH87sTpTsVhVZnzLoXftyJ4LUGksSEhqsg1bqlxWOIdqx3F4M/bHunIfi1BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"96a372977990420306e884850a494ce1b690488c667a73c7993c37abe5fead8c","last_reissued_at":"2026-07-03T01:17:27.210006Z","signature_status":"signed_v1","first_computed_at":"2026-07-03T01:17:27.210006Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.01702","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-03T01:17:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/HpGxIjWJq8TLJ3HXfp5xdOMYJX4Y8rg/wJxsM1BJ8zukziSdLgkD4Q8yAd1dYM40YBL9tVnikawFJJ7o+1+DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T09:48:34.306208Z"},"content_sha256":"424f181dc6d47ecf086fcdc19ba889e041a28c3c843b583d3d19a9ec7b97f778","schema_version":"1.0","event_id":"sha256:424f181dc6d47ecf086fcdc19ba889e041a28c3c843b583d3d19a9ec7b97f778"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:S2RXFF3ZSBBAGBXIQSCQUSKM4G","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pmeta-TLA: Backdoor Attacks for Speech Classification Models via Meta-Learning with Timbre Leakage Attack","license":"http://creativecommons.org/publicdomain/zero/1.0/","headline":"","cross_cats":["cs.AI","cs.SD"],"primary_cat":"cs.CR","authors_text":"Fen Xiao, Weiping Wen, Wenhan Yao, Xiarun Chen, Yueming Huang","submitted_at":"2026-07-02T04:51:27Z","abstract_excerpt":"Recently, speech classification methods have gained widespread adoption in intelligent gadgets. Current study indicates that backdoor attacks provide a substantial security concern to these models, underscoring the pressing necessity to investigate additional potential attack techniques to expose and prevent such risks. This work discusses the vulnerability of current speech triggers to detection by deep neural network defenders and introduces the Timbre Leakage Attack (TLA). The suggested trigger disseminates timbre information at the frame level within the deep self-supervised features, prod"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.01702","kind":"arxiv","version":1},"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/2607.01702/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":"2026-07-03T01:17:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BAtO2zpZeWT2PocV7fq74sXFLuLUhujG3bGa0b1uExyT9+tBXiPH77uEb64yUpFvv/cUiaRMkuu7ZI/EAYFnDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T09:48:34.306590Z"},"content_sha256":"11a3bd4a4dda07ef64c526d799f12bee5c0b6bc4d7963d95a3b12c5315908900","schema_version":"1.0","event_id":"sha256:11a3bd4a4dda07ef64c526d799f12bee5c0b6bc4d7963d95a3b12c5315908900"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/S2RXFF3ZSBBAGBXIQSCQUSKM4G/bundle.json","state_url":"https://pith.science/pith/S2RXFF3ZSBBAGBXIQSCQUSKM4G/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/S2RXFF3ZSBBAGBXIQSCQUSKM4G/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":"2026-07-04T09:48:34Z","links":{"resolver":"https://pith.science/pith/S2RXFF3ZSBBAGBXIQSCQUSKM4G","bundle":"https://pith.science/pith/S2RXFF3ZSBBAGBXIQSCQUSKM4G/bundle.json","state":"https://pith.science/pith/S2RXFF3ZSBBAGBXIQSCQUSKM4G/state.json","well_known_bundle":"https://pith.science/.well-known/pith/S2RXFF3ZSBBAGBXIQSCQUSKM4G/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:S2RXFF3ZSBBAGBXIQSCQUSKM4G","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":"2785f5ebb1f6b691a8e017bf0390a2b0cef241a736ffee7e593c22d212f0b0f5","cross_cats_sorted":["cs.AI","cs.SD"],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CR","submitted_at":"2026-07-02T04:51:27Z","title_canon_sha256":"acab2894fc4fed9f1003489faa3b3f35fb562f4074acb990c3f30f6ef886b15a"},"schema_version":"1.0","source":{"id":"2607.01702","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.01702","created_at":"2026-07-03T01:17:27Z"},{"alias_kind":"arxiv_version","alias_value":"2607.01702v1","created_at":"2026-07-03T01:17:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.01702","created_at":"2026-07-03T01:17:27Z"},{"alias_kind":"pith_short_12","alias_value":"S2RXFF3ZSBBA","created_at":"2026-07-03T01:17:27Z"},{"alias_kind":"pith_short_16","alias_value":"S2RXFF3ZSBBAGBXI","created_at":"2026-07-03T01:17:27Z"},{"alias_kind":"pith_short_8","alias_value":"S2RXFF3Z","created_at":"2026-07-03T01:17:27Z"}],"graph_snapshots":[{"event_id":"sha256:11a3bd4a4dda07ef64c526d799f12bee5c0b6bc4d7963d95a3b12c5315908900","target":"graph","created_at":"2026-07-03T01:17:27Z","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/2607.01702/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Recently, speech classification methods have gained widespread adoption in intelligent gadgets. Current study indicates that backdoor attacks provide a substantial security concern to these models, underscoring the pressing necessity to investigate additional potential attack techniques to expose and prevent such risks. This work discusses the vulnerability of current speech triggers to detection by deep neural network defenders and introduces the Timbre Leakage Attack (TLA). The suggested trigger disseminates timbre information at the frame level within the deep self-supervised features, prod","authors_text":"Fen Xiao, Weiping Wen, Wenhan Yao, Xiarun Chen, Yueming Huang","cross_cats":["cs.AI","cs.SD"],"headline":"","license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CR","submitted_at":"2026-07-02T04:51:27Z","title":"Pmeta-TLA: Backdoor Attacks for Speech Classification Models via Meta-Learning with Timbre Leakage Attack"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.01702","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":"sha256:424f181dc6d47ecf086fcdc19ba889e041a28c3c843b583d3d19a9ec7b97f778","target":"record","created_at":"2026-07-03T01:17:27Z","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":"2785f5ebb1f6b691a8e017bf0390a2b0cef241a736ffee7e593c22d212f0b0f5","cross_cats_sorted":["cs.AI","cs.SD"],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CR","submitted_at":"2026-07-02T04:51:27Z","title_canon_sha256":"acab2894fc4fed9f1003489faa3b3f35fb562f4074acb990c3f30f6ef886b15a"},"schema_version":"1.0","source":{"id":"2607.01702","kind":"arxiv","version":1}},"canonical_sha256":"96a372977990420306e884850a494ce1b690488c667a73c7993c37abe5fead8c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"96a372977990420306e884850a494ce1b690488c667a73c7993c37abe5fead8c","first_computed_at":"2026-07-03T01:17:27.210006Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-03T01:17:27.210006Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ws6Vq/XzTfyr5S7X2WmvwS0j92hH87sTpTsVhVZnzLoXftyJ4LUGksSEhqsg1bqlxWOIdqx3F4M/bHunIfi1BA==","signature_status":"signed_v1","signed_at":"2026-07-03T01:17:27.211015Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.01702","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:424f181dc6d47ecf086fcdc19ba889e041a28c3c843b583d3d19a9ec7b97f778","sha256:11a3bd4a4dda07ef64c526d799f12bee5c0b6bc4d7963d95a3b12c5315908900"],"state_sha256":"66d4b49e51b98699dcc678ba250061a2ea989a3276d442cceab5fd7c8f0e5110"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6e9Jlu3jXlrK8WKb/pNNolIMVSQVgmahhkVjzxoq7UVJ8SmQDlKC4CSZaw9UW0hsxPDIlXpu/InQsnXTUAz2Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-04T09:48:34.308607Z","bundle_sha256":"8e57d058338d60173fcbc391c025980ebee14a58cac7a3fca7952e5be2188e70"}}