{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:AV2QQ2UZZYF2E2R63WV4T5XWDS","short_pith_number":"pith:AV2QQ2UZ","canonical_record":{"source":{"id":"2606.13022","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-06-11T07:55:33Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"9529077c68d7de002f35b060a6db07080c190bad716d13b5a4fba2f9f8d9f4a4","abstract_canon_sha256":"a85fcc407a9cfd2bfd2bd13518f8ff9db5deb25f38f048d9773e5f82f8045027"},"schema_version":"1.0"},"canonical_sha256":"0575086a99ce0ba26a3eddabc9f6f61c9991d49f8a394d81204a6b140eeae107","source":{"kind":"arxiv","id":"2606.13022","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.13022","created_at":"2026-06-12T01:09:37Z"},{"alias_kind":"arxiv_version","alias_value":"2606.13022v1","created_at":"2026-06-12T01:09:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.13022","created_at":"2026-06-12T01:09:37Z"},{"alias_kind":"pith_short_12","alias_value":"AV2QQ2UZZYF2","created_at":"2026-06-12T01:09:37Z"},{"alias_kind":"pith_short_16","alias_value":"AV2QQ2UZZYF2E2R6","created_at":"2026-06-12T01:09:37Z"},{"alias_kind":"pith_short_8","alias_value":"AV2QQ2UZ","created_at":"2026-06-12T01:09:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:AV2QQ2UZZYF2E2R63WV4T5XWDS","target":"record","payload":{"canonical_record":{"source":{"id":"2606.13022","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-06-11T07:55:33Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"9529077c68d7de002f35b060a6db07080c190bad716d13b5a4fba2f9f8d9f4a4","abstract_canon_sha256":"a85fcc407a9cfd2bfd2bd13518f8ff9db5deb25f38f048d9773e5f82f8045027"},"schema_version":"1.0"},"canonical_sha256":"0575086a99ce0ba26a3eddabc9f6f61c9991d49f8a394d81204a6b140eeae107","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-12T01:09:37.322358Z","signature_b64":"QTEBqdA8eOKz3tFqCpifJXXw/MpBKLhqgzon0LJHWcsfsyydje0qT4IOtXGZPAr6hGwoMG3JT+Fi68LLqxPKDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0575086a99ce0ba26a3eddabc9f6f61c9991d49f8a394d81204a6b140eeae107","last_reissued_at":"2026-06-12T01:09:37.321810Z","signature_status":"signed_v1","first_computed_at":"2026-06-12T01:09:37.321810Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.13022","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":"2026-06-12T01:09:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WAlHu9LeRmeCiz6qiwr3OR2LFlok8IYtlka7mX8rVoO8ieg6BG8k2UZs8T7J7KeEhSmimmBBdulYPHWB36O3AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-22T22:47:58.079273Z"},"content_sha256":"5915820fc1425dbb8fe534d87dc546c69397524f086cfc554736a7f3b2210290","schema_version":"1.0","event_id":"sha256:5915820fc1425dbb8fe534d87dc546c69397524f086cfc554736a7f3b2210290"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:AV2QQ2UZZYF2E2R63WV4T5XWDS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quality-Preserving Imperceptible Adversarial Attack on Skeleton-based Human Action Recognition","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.LG"],"primary_cat":"cs.CV","authors_text":"Hubert P. H. Shum, Kanglei Zhou, Xiaohui Liang, Ziyi Chang","submitted_at":"2026-06-11T07:55:33Z","abstract_excerpt":"Adversarial attacks on skeletal human action recognition have received significant attention. However, existing methods typically introduce noise-like perturbations that degrade motion quality post-attack, and thereby are inherently perceptible with recent advancements in S-HAR systems. We discover that this degradation stems from the gap between empirical and true risks during the optimization process of previous adversarial attacks. To address this issue, we propose an attack where adversarial motions are obtained without compromising their motion quality. To minimize the risk gap and preser"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.13022","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/2606.13022/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":"2026-06-12T01:09:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"adhBj56VTUTO3kMvJQZAdSt32I90L43gmNSH3Dqwny5NBkIRu+KxEA66cOSdiu+oq14JX/UpSK2Jq4VxhV+yDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-22T22:47:58.079665Z"},"content_sha256":"86ff4925f904f55711830e381f01875dcd5eaf7d929113f7bc3a5e22377fdce7","schema_version":"1.0","event_id":"sha256:86ff4925f904f55711830e381f01875dcd5eaf7d929113f7bc3a5e22377fdce7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AV2QQ2UZZYF2E2R63WV4T5XWDS/bundle.json","state_url":"https://pith.science/pith/AV2QQ2UZZYF2E2R63WV4T5XWDS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AV2QQ2UZZYF2E2R63WV4T5XWDS/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":"2026-06-22T22:47:58Z","links":{"resolver":"https://pith.science/pith/AV2QQ2UZZYF2E2R63WV4T5XWDS","bundle":"https://pith.science/pith/AV2QQ2UZZYF2E2R63WV4T5XWDS/bundle.json","state":"https://pith.science/pith/AV2QQ2UZZYF2E2R63WV4T5XWDS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AV2QQ2UZZYF2E2R63WV4T5XWDS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:AV2QQ2UZZYF2E2R63WV4T5XWDS","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":"a85fcc407a9cfd2bfd2bd13518f8ff9db5deb25f38f048d9773e5f82f8045027","cross_cats_sorted":["cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-06-11T07:55:33Z","title_canon_sha256":"9529077c68d7de002f35b060a6db07080c190bad716d13b5a4fba2f9f8d9f4a4"},"schema_version":"1.0","source":{"id":"2606.13022","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.13022","created_at":"2026-06-12T01:09:37Z"},{"alias_kind":"arxiv_version","alias_value":"2606.13022v1","created_at":"2026-06-12T01:09:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.13022","created_at":"2026-06-12T01:09:37Z"},{"alias_kind":"pith_short_12","alias_value":"AV2QQ2UZZYF2","created_at":"2026-06-12T01:09:37Z"},{"alias_kind":"pith_short_16","alias_value":"AV2QQ2UZZYF2E2R6","created_at":"2026-06-12T01:09:37Z"},{"alias_kind":"pith_short_8","alias_value":"AV2QQ2UZ","created_at":"2026-06-12T01:09:37Z"}],"graph_snapshots":[{"event_id":"sha256:86ff4925f904f55711830e381f01875dcd5eaf7d929113f7bc3a5e22377fdce7","target":"graph","created_at":"2026-06-12T01:09:37Z","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/2606.13022/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Adversarial attacks on skeletal human action recognition have received significant attention. However, existing methods typically introduce noise-like perturbations that degrade motion quality post-attack, and thereby are inherently perceptible with recent advancements in S-HAR systems. We discover that this degradation stems from the gap between empirical and true risks during the optimization process of previous adversarial attacks. To address this issue, we propose an attack where adversarial motions are obtained without compromising their motion quality. To minimize the risk gap and preser","authors_text":"Hubert P. H. Shum, Kanglei Zhou, Xiaohui Liang, Ziyi Chang","cross_cats":["cs.LG"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-06-11T07:55:33Z","title":"Quality-Preserving Imperceptible Adversarial Attack on Skeleton-based Human Action Recognition"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.13022","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":"sha256:5915820fc1425dbb8fe534d87dc546c69397524f086cfc554736a7f3b2210290","target":"record","created_at":"2026-06-12T01:09:37Z","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":"a85fcc407a9cfd2bfd2bd13518f8ff9db5deb25f38f048d9773e5f82f8045027","cross_cats_sorted":["cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-06-11T07:55:33Z","title_canon_sha256":"9529077c68d7de002f35b060a6db07080c190bad716d13b5a4fba2f9f8d9f4a4"},"schema_version":"1.0","source":{"id":"2606.13022","kind":"arxiv","version":1}},"canonical_sha256":"0575086a99ce0ba26a3eddabc9f6f61c9991d49f8a394d81204a6b140eeae107","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0575086a99ce0ba26a3eddabc9f6f61c9991d49f8a394d81204a6b140eeae107","first_computed_at":"2026-06-12T01:09:37.321810Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-12T01:09:37.321810Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QTEBqdA8eOKz3tFqCpifJXXw/MpBKLhqgzon0LJHWcsfsyydje0qT4IOtXGZPAr6hGwoMG3JT+Fi68LLqxPKDw==","signature_status":"signed_v1","signed_at":"2026-06-12T01:09:37.322358Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.13022","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5915820fc1425dbb8fe534d87dc546c69397524f086cfc554736a7f3b2210290","sha256:86ff4925f904f55711830e381f01875dcd5eaf7d929113f7bc3a5e22377fdce7"],"state_sha256":"bbce6d583c87f9defb408704c596712d6525e6b6a74902415d21d200769f85cb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m7Q2T0XGHM+a3wMy3z8XCH2YbQPyxbZ3I7sbyQ1NW5z83Qjnbb3DV77bcX31waRK5We1VHgPyDFu6F+li4RMCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-22T22:47:58.083126Z","bundle_sha256":"06ce3e22670c7a672e00f7c94cb89ade1f5ac416892d093182ce58de1211590e"}}