{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:FCIGSPE6JRUBMGYKTO22KRPSNE","short_pith_number":"pith:FCIGSPE6","canonical_record":{"source":{"id":"1907.05972","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2019-07-12T22:21:38Z","cross_cats_sorted":[],"title_canon_sha256":"f83cfee1e24dcb8428373c6576c8af97141988eed2b73bc67afd599c117c9149","abstract_canon_sha256":"de7b8e52d763fb2991ac9fc1060e76b5f4e8f5adb56bb04c600a249df524f5b5"},"schema_version":"1.0"},"canonical_sha256":"2890693c9e4c68161b0a9bb5a545f26937ddb89a1904e1568254c728b1db8cd4","source":{"kind":"arxiv","id":"1907.05972","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.05972","created_at":"2026-07-05T01:43:54Z"},{"alias_kind":"arxiv_version","alias_value":"1907.05972v3","created_at":"2026-07-05T01:43:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.05972","created_at":"2026-07-05T01:43:54Z"},{"alias_kind":"pith_short_12","alias_value":"FCIGSPE6JRUB","created_at":"2026-07-05T01:43:54Z"},{"alias_kind":"pith_short_16","alias_value":"FCIGSPE6JRUBMGYK","created_at":"2026-07-05T01:43:54Z"},{"alias_kind":"pith_short_8","alias_value":"FCIGSPE6","created_at":"2026-07-05T01:43:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:FCIGSPE6JRUBMGYKTO22KRPSNE","target":"record","payload":{"canonical_record":{"source":{"id":"1907.05972","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2019-07-12T22:21:38Z","cross_cats_sorted":[],"title_canon_sha256":"f83cfee1e24dcb8428373c6576c8af97141988eed2b73bc67afd599c117c9149","abstract_canon_sha256":"de7b8e52d763fb2991ac9fc1060e76b5f4e8f5adb56bb04c600a249df524f5b5"},"schema_version":"1.0"},"canonical_sha256":"2890693c9e4c68161b0a9bb5a545f26937ddb89a1904e1568254c728b1db8cd4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:43:54.697482Z","signature_b64":"9Qw3dYZ/MyvtcUKrpaqLJieVIQg3+byP1oEXvVrRttnoB4Q/+BT3xxHYpMeTBWs1oLGelNg5GugJap8r7boxDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2890693c9e4c68161b0a9bb5a545f26937ddb89a1904e1568254c728b1db8cd4","last_reissued_at":"2026-07-05T01:43:54.697008Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:43:54.697008Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.05972","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:43:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DJ5pDpcoeq7SFw5+l02693wdJsmesNMBhz0lURaOtHsy69TRLVdQnfOxE8JY1hTJxCxcjUpW2AfQqQqC1+9qAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T07:16:23.932490Z"},"content_sha256":"6d8d761417d05f3e34ac51ecdcd5e0897d79f2a66439d34b0718a31372d7db0d","schema_version":"1.0","event_id":"sha256:6d8d761417d05f3e34ac51ecdcd5e0897d79f2a66439d34b0718a31372d7db0d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:FCIGSPE6JRUBMGYKTO22KRPSNE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Motion Sensor-based Privacy Attack on Smartphones","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CR","authors_text":"Chen Wang, Jian Liu, Nitesh Saxena, S Abhishek Anand, Yingying Chen","submitted_at":"2019-07-12T22:21:38Z","abstract_excerpt":"In this paper, we build a speech privacy attack that exploits speech reverberations generated from a smartphone's in-built loudspeaker captured via a zero-permission motion sensor (accelerometer). We design our attack Spearphone2, and demonstrate that speech reverberations from inbuilt loudspeakers, at an appropriate loudness, can impact the accelerometer, leaking sensitive information about the speech. In particular, we show that by exploiting the affected accelerometer readings and carefully selecting feature sets along with off-the-shelf machine learning techniques, Spearphone can successfu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.05972","kind":"arxiv","version":3},"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/1907.05972/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":"2026-07-05T01:43:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PUrQFlpXNT3+EV9MjrJT8WFIGJ8MMF1bUNa6p9daQ/7Gp1cqp4kJOtaKcB7PgABQ0I09Ez75Hpro5nkUUoNdDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T07:16:23.932903Z"},"content_sha256":"697967ebd92499717de8c7f0084b3282f4cf2a917ab6e341684e4f63fcab3169","schema_version":"1.0","event_id":"sha256:697967ebd92499717de8c7f0084b3282f4cf2a917ab6e341684e4f63fcab3169"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FCIGSPE6JRUBMGYKTO22KRPSNE/bundle.json","state_url":"https://pith.science/pith/FCIGSPE6JRUBMGYKTO22KRPSNE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FCIGSPE6JRUBMGYKTO22KRPSNE/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":"2026-08-07T07:16:23Z","links":{"resolver":"https://pith.science/pith/FCIGSPE6JRUBMGYKTO22KRPSNE","bundle":"https://pith.science/pith/FCIGSPE6JRUBMGYKTO22KRPSNE/bundle.json","state":"https://pith.science/pith/FCIGSPE6JRUBMGYKTO22KRPSNE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FCIGSPE6JRUBMGYKTO22KRPSNE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:FCIGSPE6JRUBMGYKTO22KRPSNE","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":"de7b8e52d763fb2991ac9fc1060e76b5f4e8f5adb56bb04c600a249df524f5b5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2019-07-12T22:21:38Z","title_canon_sha256":"f83cfee1e24dcb8428373c6576c8af97141988eed2b73bc67afd599c117c9149"},"schema_version":"1.0","source":{"id":"1907.05972","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.05972","created_at":"2026-07-05T01:43:54Z"},{"alias_kind":"arxiv_version","alias_value":"1907.05972v3","created_at":"2026-07-05T01:43:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.05972","created_at":"2026-07-05T01:43:54Z"},{"alias_kind":"pith_short_12","alias_value":"FCIGSPE6JRUB","created_at":"2026-07-05T01:43:54Z"},{"alias_kind":"pith_short_16","alias_value":"FCIGSPE6JRUBMGYK","created_at":"2026-07-05T01:43:54Z"},{"alias_kind":"pith_short_8","alias_value":"FCIGSPE6","created_at":"2026-07-05T01:43:54Z"}],"graph_snapshots":[{"event_id":"sha256:697967ebd92499717de8c7f0084b3282f4cf2a917ab6e341684e4f63fcab3169","target":"graph","created_at":"2026-07-05T01:43:54Z","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/1907.05972/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this paper, we build a speech privacy attack that exploits speech reverberations generated from a smartphone's in-built loudspeaker captured via a zero-permission motion sensor (accelerometer). We design our attack Spearphone2, and demonstrate that speech reverberations from inbuilt loudspeakers, at an appropriate loudness, can impact the accelerometer, leaking sensitive information about the speech. In particular, we show that by exploiting the affected accelerometer readings and carefully selecting feature sets along with off-the-shelf machine learning techniques, Spearphone can successfu","authors_text":"Chen Wang, Jian Liu, Nitesh Saxena, S Abhishek Anand, Yingying Chen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2019-07-12T22:21:38Z","title":"Motion Sensor-based Privacy Attack on Smartphones"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.05972","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":"sha256:6d8d761417d05f3e34ac51ecdcd5e0897d79f2a66439d34b0718a31372d7db0d","target":"record","created_at":"2026-07-05T01:43:54Z","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":"de7b8e52d763fb2991ac9fc1060e76b5f4e8f5adb56bb04c600a249df524f5b5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2019-07-12T22:21:38Z","title_canon_sha256":"f83cfee1e24dcb8428373c6576c8af97141988eed2b73bc67afd599c117c9149"},"schema_version":"1.0","source":{"id":"1907.05972","kind":"arxiv","version":3}},"canonical_sha256":"2890693c9e4c68161b0a9bb5a545f26937ddb89a1904e1568254c728b1db8cd4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2890693c9e4c68161b0a9bb5a545f26937ddb89a1904e1568254c728b1db8cd4","first_computed_at":"2026-07-05T01:43:54.697008Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:43:54.697008Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9Qw3dYZ/MyvtcUKrpaqLJieVIQg3+byP1oEXvVrRttnoB4Q/+BT3xxHYpMeTBWs1oLGelNg5GugJap8r7boxDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:43:54.697482Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.05972","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6d8d761417d05f3e34ac51ecdcd5e0897d79f2a66439d34b0718a31372d7db0d","sha256:697967ebd92499717de8c7f0084b3282f4cf2a917ab6e341684e4f63fcab3169"],"state_sha256":"ec2cbdb139b2c92445bc972c0af8c8ac9c486e020b54e1960b84dc0a20339397"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J8uB5lZoziwZNH2gcfHhLk8N9QW3ESh/9Ywm2+3On6jP/344LogAC54/02GlttQM5RZP6aKKfa6y0g5mMUeJBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T07:16:23.935868Z","bundle_sha256":"8d2499a21239a2cbe6c412edab7c3b59b4d69f924bfa92d9d15ea49dd64ac1d9"}}