{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:6AZMREHP5HMVCLZAX6AXF3KODY","short_pith_number":"pith:6AZMREHP","canonical_record":{"source":{"id":"1503.00454","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2015-03-02T09:43:14Z","cross_cats_sorted":[],"title_canon_sha256":"17b0acc04f2dba36f2bca7f4705c685e73c6d7b36093f0b8ede90feb9d0d288d","abstract_canon_sha256":"ccba97fb12a44dc45fc300d1b4acdc50aa6d664e7e1ad083ab11b37f9a5eb2c7"},"schema_version":"1.0"},"canonical_sha256":"f032c890efe9d9512f20bf8172ed4e1e069c773fd8fb6a81ea4adac8617bbb2c","source":{"kind":"arxiv","id":"1503.00454","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.00454","created_at":"2026-05-18T02:25:54Z"},{"alias_kind":"arxiv_version","alias_value":"1503.00454v1","created_at":"2026-05-18T02:25:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.00454","created_at":"2026-05-18T02:25:54Z"},{"alias_kind":"pith_short_12","alias_value":"6AZMREHP5HMV","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"6AZMREHP5HMVCLZA","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"6AZMREHP","created_at":"2026-05-18T12:29:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:6AZMREHP5HMVCLZAX6AXF3KODY","target":"record","payload":{"canonical_record":{"source":{"id":"1503.00454","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2015-03-02T09:43:14Z","cross_cats_sorted":[],"title_canon_sha256":"17b0acc04f2dba36f2bca7f4705c685e73c6d7b36093f0b8ede90feb9d0d288d","abstract_canon_sha256":"ccba97fb12a44dc45fc300d1b4acdc50aa6d664e7e1ad083ab11b37f9a5eb2c7"},"schema_version":"1.0"},"canonical_sha256":"f032c890efe9d9512f20bf8172ed4e1e069c773fd8fb6a81ea4adac8617bbb2c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:25:54.438352Z","signature_b64":"oHznkHoUmUEVNpn/jQvd+fPkv/xHCGCJ3wMhr0jA3DMnw+MasrGGxvSaORTdJBExcnCbw5QDQALvbNaakdl6Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f032c890efe9d9512f20bf8172ed4e1e069c773fd8fb6a81ea4adac8617bbb2c","last_reissued_at":"2026-05-18T02:25:54.437909Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:25:54.437909Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1503.00454","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":"2026-05-18T02:25:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W2Ikwr3+ELcYrKVaSyJmfNyAPqeke4nCYoqmKd19BuZolupcOhuCL8CQoEo8xkJN9iGEDq0H5dBujT4gd0TLDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T13:33:44.576387Z"},"content_sha256":"10cdcfd1e974b37b69af9111c46ee53e6e4a47325459928efb4f10e07bd37bae","schema_version":"1.0","event_id":"sha256:10cdcfd1e974b37b69af9111c46ee53e6e4a47325459928efb4f10e07bd37bae"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:6AZMREHP5HMVCLZAX6AXF3KODY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Flexible and Robust Privacy-Preserving Implicit Authentication","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CR","authors_text":"Alberto Blanco-Justicia, Josep Domingo-Ferrer, Qianhong Wu","submitted_at":"2015-03-02T09:43:14Z","abstract_excerpt":"Implicit authentication consists of a server authenticating a user based on the user's usage profile, instead of/in addition to relying on something the user explicitly knows (passwords, private keys, etc.). While implicit authentication makes identity theft by third parties more difficult, it requires the server to learn and store the user's usage profile. Recently, the first privacy-preserving implicit authentication system was presented, in which the server does not learn the user's profile. It uses an ad hoc two-party computation protocol to compare the user's fresh sampled features agains"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.00454","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":""},"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":"2026-05-18T02:25:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2dl2J2TurCf36s9/Ut7SN3Q43xJ2g1o7MKoowbGNljA9/X/hO2M0wp4BciMxYaXxZV31CEe4pCksOQEMGTgdAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T13:33:44.576734Z"},"content_sha256":"d170b2aa9aaf6dbb6b9943f7a9adfc574698cec04ee3970c86fd60b6ef5e0ceb","schema_version":"1.0","event_id":"sha256:d170b2aa9aaf6dbb6b9943f7a9adfc574698cec04ee3970c86fd60b6ef5e0ceb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6AZMREHP5HMVCLZAX6AXF3KODY/bundle.json","state_url":"https://pith.science/pith/6AZMREHP5HMVCLZAX6AXF3KODY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6AZMREHP5HMVCLZAX6AXF3KODY/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":"2026-06-08T13:33:44Z","links":{"resolver":"https://pith.science/pith/6AZMREHP5HMVCLZAX6AXF3KODY","bundle":"https://pith.science/pith/6AZMREHP5HMVCLZAX6AXF3KODY/bundle.json","state":"https://pith.science/pith/6AZMREHP5HMVCLZAX6AXF3KODY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6AZMREHP5HMVCLZAX6AXF3KODY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:6AZMREHP5HMVCLZAX6AXF3KODY","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":"ccba97fb12a44dc45fc300d1b4acdc50aa6d664e7e1ad083ab11b37f9a5eb2c7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2015-03-02T09:43:14Z","title_canon_sha256":"17b0acc04f2dba36f2bca7f4705c685e73c6d7b36093f0b8ede90feb9d0d288d"},"schema_version":"1.0","source":{"id":"1503.00454","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.00454","created_at":"2026-05-18T02:25:54Z"},{"alias_kind":"arxiv_version","alias_value":"1503.00454v1","created_at":"2026-05-18T02:25:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.00454","created_at":"2026-05-18T02:25:54Z"},{"alias_kind":"pith_short_12","alias_value":"6AZMREHP5HMV","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"6AZMREHP5HMVCLZA","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"6AZMREHP","created_at":"2026-05-18T12:29:07Z"}],"graph_snapshots":[{"event_id":"sha256:d170b2aa9aaf6dbb6b9943f7a9adfc574698cec04ee3970c86fd60b6ef5e0ceb","target":"graph","created_at":"2026-05-18T02:25:54Z","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"},"paper":{"abstract_excerpt":"Implicit authentication consists of a server authenticating a user based on the user's usage profile, instead of/in addition to relying on something the user explicitly knows (passwords, private keys, etc.). While implicit authentication makes identity theft by third parties more difficult, it requires the server to learn and store the user's usage profile. Recently, the first privacy-preserving implicit authentication system was presented, in which the server does not learn the user's profile. It uses an ad hoc two-party computation protocol to compare the user's fresh sampled features agains","authors_text":"Alberto Blanco-Justicia, Josep Domingo-Ferrer, Qianhong Wu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2015-03-02T09:43:14Z","title":"Flexible and Robust Privacy-Preserving Implicit Authentication"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.00454","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":"sha256:10cdcfd1e974b37b69af9111c46ee53e6e4a47325459928efb4f10e07bd37bae","target":"record","created_at":"2026-05-18T02:25:54Z","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":"ccba97fb12a44dc45fc300d1b4acdc50aa6d664e7e1ad083ab11b37f9a5eb2c7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2015-03-02T09:43:14Z","title_canon_sha256":"17b0acc04f2dba36f2bca7f4705c685e73c6d7b36093f0b8ede90feb9d0d288d"},"schema_version":"1.0","source":{"id":"1503.00454","kind":"arxiv","version":1}},"canonical_sha256":"f032c890efe9d9512f20bf8172ed4e1e069c773fd8fb6a81ea4adac8617bbb2c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f032c890efe9d9512f20bf8172ed4e1e069c773fd8fb6a81ea4adac8617bbb2c","first_computed_at":"2026-05-18T02:25:54.437909Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:25:54.437909Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oHznkHoUmUEVNpn/jQvd+fPkv/xHCGCJ3wMhr0jA3DMnw+MasrGGxvSaORTdJBExcnCbw5QDQALvbNaakdl6Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:25:54.438352Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.00454","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:10cdcfd1e974b37b69af9111c46ee53e6e4a47325459928efb4f10e07bd37bae","sha256:d170b2aa9aaf6dbb6b9943f7a9adfc574698cec04ee3970c86fd60b6ef5e0ceb"],"state_sha256":"a5c8843a0edfb1a7e0ca7a10415c9ca3c2c48b71363dd2816a5bfbdc67f49e8d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4ySty8m08w+Lgh66S0ZCawVS/OEverY6hp3KlBS/56396MIimmFmSmHL3bDTZjSCEwmU6xPKqtinCYiiyVdNDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T13:33:44.578906Z","bundle_sha256":"2000cf3272c8c7eeea457c747d96db9254723e8f96c74f369054b4898c526baa"}}