{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:VHCF32Y7RIKKWU3JFFA7Q5DWVV","short_pith_number":"pith:VHCF32Y7","canonical_record":{"source":{"id":"2404.09095","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.CR","submitted_at":"2024-04-13T22:39:07Z","cross_cats_sorted":[],"title_canon_sha256":"e92434cd577408ec8163c2c5a1d6236188f6cf28c42c1d2a0d591e4e38029229","abstract_canon_sha256":"54bf17e39224c69630c4ed3c0980df19af066f665c31ed2200a140e5d6b95578"},"schema_version":"1.0"},"canonical_sha256":"a9c45deb1f8a14ab53692941f87476ad4750802edc31604bf9d1b13c97a01a2b","source":{"kind":"arxiv","id":"2404.09095","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2404.09095","created_at":"2026-07-05T08:07:45Z"},{"alias_kind":"arxiv_version","alias_value":"2404.09095v1","created_at":"2026-07-05T08:07:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2404.09095","created_at":"2026-07-05T08:07:45Z"},{"alias_kind":"pith_short_12","alias_value":"VHCF32Y7RIKK","created_at":"2026-07-05T08:07:45Z"},{"alias_kind":"pith_short_16","alias_value":"VHCF32Y7RIKKWU3J","created_at":"2026-07-05T08:07:45Z"},{"alias_kind":"pith_short_8","alias_value":"VHCF32Y7","created_at":"2026-07-05T08:07:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:VHCF32Y7RIKKWU3JFFA7Q5DWVV","target":"record","payload":{"canonical_record":{"source":{"id":"2404.09095","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.CR","submitted_at":"2024-04-13T22:39:07Z","cross_cats_sorted":[],"title_canon_sha256":"e92434cd577408ec8163c2c5a1d6236188f6cf28c42c1d2a0d591e4e38029229","abstract_canon_sha256":"54bf17e39224c69630c4ed3c0980df19af066f665c31ed2200a140e5d6b95578"},"schema_version":"1.0"},"canonical_sha256":"a9c45deb1f8a14ab53692941f87476ad4750802edc31604bf9d1b13c97a01a2b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:07:45.130135Z","signature_b64":"hlsBULlp18jL1wCbQT+oUsdYQcCToyzzWyUlnfVPWEW0HRM9TM52c6Xh09EIUZYUJ8+9jYw6SLy/jdUb5t1fAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a9c45deb1f8a14ab53692941f87476ad4750802edc31604bf9d1b13c97a01a2b","last_reissued_at":"2026-07-05T08:07:45.129779Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:07:45.129779Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2404.09095","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":"2026-07-05T08:07:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Uo22ge0RmAAduOeAPVhdjiAsuTbF+4NA15liWLSt7c8r1XtH8mZgoMHXNeuI5DG+N7858vpCHLYJQtTTaXOQBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T11:52:15.645113Z"},"content_sha256":"9c427519a6b7875404694227d0bebf15d31be8b1abe8b8be247422dfb9cdc609","schema_version":"1.0","event_id":"sha256:9c427519a6b7875404694227d0bebf15d31be8b1abe8b8be247422dfb9cdc609"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:VHCF32Y7RIKKWU3JFFA7Q5DWVV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pirates: Anonymous Group Calls Over Fully Untrusted Infrastructure","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.CR","authors_text":"Akim Stark, Christoph Coijanovic, Daniel Schadt, Thorsten Strufe","submitted_at":"2024-04-13T22:39:07Z","abstract_excerpt":"Anonymous metadata-private voice call protocols suffer from high delays and so far cannot provide group call functionality. Anonymization inherently yields delay penalties, and scaling signalling and communication to groups of users exacerbates this situation. Our protocol Pirates employs PIR, improves parallelization and signalling, and is the first group voice call protocol that guarantees the strong anonymity notion of communication unobservability. Implementing and measuring a prototype, we show that Pirates with a single server can support group calls with three group members from an 11 c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.09095","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/2404.09095/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":"2026-07-05T08:07:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1l/XmZw9SJyBBLuBuYIS23ZQSteHpcBeNzNxbxNClUJlWtDABqBDPqJ3Q7F7TRUtFnuD7pXLGue5dMfAulNEBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T11:52:15.645624Z"},"content_sha256":"6381f364379a4a9e6adb2ccd85f9a9314ad8b5410277eef34d2ea5b2a275cc5f","schema_version":"1.0","event_id":"sha256:6381f364379a4a9e6adb2ccd85f9a9314ad8b5410277eef34d2ea5b2a275cc5f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VHCF32Y7RIKKWU3JFFA7Q5DWVV/bundle.json","state_url":"https://pith.science/pith/VHCF32Y7RIKKWU3JFFA7Q5DWVV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VHCF32Y7RIKKWU3JFFA7Q5DWVV/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":"2026-08-06T11:52:15Z","links":{"resolver":"https://pith.science/pith/VHCF32Y7RIKKWU3JFFA7Q5DWVV","bundle":"https://pith.science/pith/VHCF32Y7RIKKWU3JFFA7Q5DWVV/bundle.json","state":"https://pith.science/pith/VHCF32Y7RIKKWU3JFFA7Q5DWVV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VHCF32Y7RIKKWU3JFFA7Q5DWVV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:VHCF32Y7RIKKWU3JFFA7Q5DWVV","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":"54bf17e39224c69630c4ed3c0980df19af066f665c31ed2200a140e5d6b95578","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.CR","submitted_at":"2024-04-13T22:39:07Z","title_canon_sha256":"e92434cd577408ec8163c2c5a1d6236188f6cf28c42c1d2a0d591e4e38029229"},"schema_version":"1.0","source":{"id":"2404.09095","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2404.09095","created_at":"2026-07-05T08:07:45Z"},{"alias_kind":"arxiv_version","alias_value":"2404.09095v1","created_at":"2026-07-05T08:07:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2404.09095","created_at":"2026-07-05T08:07:45Z"},{"alias_kind":"pith_short_12","alias_value":"VHCF32Y7RIKK","created_at":"2026-07-05T08:07:45Z"},{"alias_kind":"pith_short_16","alias_value":"VHCF32Y7RIKKWU3J","created_at":"2026-07-05T08:07:45Z"},{"alias_kind":"pith_short_8","alias_value":"VHCF32Y7","created_at":"2026-07-05T08:07:45Z"}],"graph_snapshots":[{"event_id":"sha256:6381f364379a4a9e6adb2ccd85f9a9314ad8b5410277eef34d2ea5b2a275cc5f","target":"graph","created_at":"2026-07-05T08:07:45Z","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/2404.09095/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Anonymous metadata-private voice call protocols suffer from high delays and so far cannot provide group call functionality. Anonymization inherently yields delay penalties, and scaling signalling and communication to groups of users exacerbates this situation. Our protocol Pirates employs PIR, improves parallelization and signalling, and is the first group voice call protocol that guarantees the strong anonymity notion of communication unobservability. Implementing and measuring a prototype, we show that Pirates with a single server can support group calls with three group members from an 11 c","authors_text":"Akim Stark, Christoph Coijanovic, Daniel Schadt, Thorsten Strufe","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.CR","submitted_at":"2024-04-13T22:39:07Z","title":"Pirates: Anonymous Group Calls Over Fully Untrusted Infrastructure"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.09095","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":"sha256:9c427519a6b7875404694227d0bebf15d31be8b1abe8b8be247422dfb9cdc609","target":"record","created_at":"2026-07-05T08:07:45Z","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":"54bf17e39224c69630c4ed3c0980df19af066f665c31ed2200a140e5d6b95578","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.CR","submitted_at":"2024-04-13T22:39:07Z","title_canon_sha256":"e92434cd577408ec8163c2c5a1d6236188f6cf28c42c1d2a0d591e4e38029229"},"schema_version":"1.0","source":{"id":"2404.09095","kind":"arxiv","version":1}},"canonical_sha256":"a9c45deb1f8a14ab53692941f87476ad4750802edc31604bf9d1b13c97a01a2b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a9c45deb1f8a14ab53692941f87476ad4750802edc31604bf9d1b13c97a01a2b","first_computed_at":"2026-07-05T08:07:45.129779Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:07:45.129779Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hlsBULlp18jL1wCbQT+oUsdYQcCToyzzWyUlnfVPWEW0HRM9TM52c6Xh09EIUZYUJ8+9jYw6SLy/jdUb5t1fAg==","signature_status":"signed_v1","signed_at":"2026-07-05T08:07:45.130135Z","signed_message":"canonical_sha256_bytes"},"source_id":"2404.09095","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9c427519a6b7875404694227d0bebf15d31be8b1abe8b8be247422dfb9cdc609","sha256:6381f364379a4a9e6adb2ccd85f9a9314ad8b5410277eef34d2ea5b2a275cc5f"],"state_sha256":"7430d9796e9f5beca6da9adf2cc791b8e6ef98e9820a2b1131f7ef34369a9b95"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2xZbXhX7KJvzP5DX6uP/ILDmWNqGA6zHrkBD9IZ50TvTXjY912iF3dD+bBbCcJqViYHBlaK9E7oeKydRVtBOBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T11:52:15.650982Z","bundle_sha256":"03beba880d615e2f79aa8c5004bf71abc15f6af988b4eabc6dc6d626864876af"}}