{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:QUFYZ5H6BHNANKWGA2JL3AZ5TA","short_pith_number":"pith:QUFYZ5H6","canonical_record":{"source":{"id":"1710.06494","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2017-10-17T20:22:17Z","cross_cats_sorted":["cs.CR"],"title_canon_sha256":"eff2318a954ec22ddb5eb894d7483742345aa32a11cd69170d091c297d59f29a","abstract_canon_sha256":"0b126d3154c25d5ea984eb03801f7470c2f1bcf7a10c3f10a314053ea7728a46"},"schema_version":"1.0"},"canonical_sha256":"850b8cf4fe09da06aac60692bd833d98231b7e624cea4f500a97c2590bc7f026","source":{"kind":"arxiv","id":"1710.06494","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1710.06494","created_at":"2026-05-17T23:51:21Z"},{"alias_kind":"arxiv_version","alias_value":"1710.06494v2","created_at":"2026-05-17T23:51:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.06494","created_at":"2026-05-17T23:51:21Z"},{"alias_kind":"pith_short_12","alias_value":"QUFYZ5H6BHNA","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"QUFYZ5H6BHNANKWG","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"QUFYZ5H6","created_at":"2026-05-18T12:31:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:QUFYZ5H6BHNANKWGA2JL3AZ5TA","target":"record","payload":{"canonical_record":{"source":{"id":"1710.06494","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2017-10-17T20:22:17Z","cross_cats_sorted":["cs.CR"],"title_canon_sha256":"eff2318a954ec22ddb5eb894d7483742345aa32a11cd69170d091c297d59f29a","abstract_canon_sha256":"0b126d3154c25d5ea984eb03801f7470c2f1bcf7a10c3f10a314053ea7728a46"},"schema_version":"1.0"},"canonical_sha256":"850b8cf4fe09da06aac60692bd833d98231b7e624cea4f500a97c2590bc7f026","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:51:21.503204Z","signature_b64":"7tDadav+ZT8awKv9foqj210/Fwzueoa3yAsEK0lv17gaHrffzEYvF26BFn0kOxsFTxElOBYpihmW9s3LvetBDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"850b8cf4fe09da06aac60692bd833d98231b7e624cea4f500a97c2590bc7f026","last_reissued_at":"2026-05-17T23:51:21.502562Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:51:21.502562Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1710.06494","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:51:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PlJ/zz9bkVFxsU1HAfPKIbUVibqP1MVXEBNT1jppWPKV/B0oXLTLxt7RJ2WDGvvMGA2pUJchbA5VZCY3GYXbDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T16:33:20.700197Z"},"content_sha256":"6926b7d1f9d2885f5138605995d478329d40d8c87a57076876d49fc5912465f6","schema_version":"1.0","event_id":"sha256:6926b7d1f9d2885f5138605995d478329d40d8c87a57076876d49fc5912465f6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:QUFYZ5H6BHNANKWGA2JL3AZ5TA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Privacy by typing in the $\\pi$-calculus","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CR"],"primary_cat":"cs.LO","authors_text":"Anna Philippou, Dimitrios Kouzapas","submitted_at":"2017-10-17T20:22:17Z","abstract_excerpt":"In this paper we propose a formal framework for studying privacy in information systems. The proposal follows a two-axes schema where the first axis considers privacy as a taxonomy of rights and the second axis involves the ways an information system stores and manipulates information. We develop a correspondence between the above schema and an associated model of computation. In particular, we propose the \\Pcalc, a calculus based on the $\\pi$-calculus with groups extended with constructs for reasoning about private data. The privacy requirements of an information system are captured via a pri"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.06494","kind":"arxiv","version":2},"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":"2026-05-17T23:51:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yOR1CC7EcFR7X1MD0Hdfbtt41QRF/9uIz+gKjfx41RlH8yXRud8S42vF/UmYV/iA6M7wRcwKuKfIZQdOd/XPDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T16:33:20.700559Z"},"content_sha256":"b4f0e58fb9dea8a1467e36ea47250a74ae3d6039b7d05d8a3f83c7ce02d6be36","schema_version":"1.0","event_id":"sha256:b4f0e58fb9dea8a1467e36ea47250a74ae3d6039b7d05d8a3f83c7ce02d6be36"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QUFYZ5H6BHNANKWGA2JL3AZ5TA/bundle.json","state_url":"https://pith.science/pith/QUFYZ5H6BHNANKWGA2JL3AZ5TA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QUFYZ5H6BHNANKWGA2JL3AZ5TA/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":"2026-06-04T16:33:20Z","links":{"resolver":"https://pith.science/pith/QUFYZ5H6BHNANKWGA2JL3AZ5TA","bundle":"https://pith.science/pith/QUFYZ5H6BHNANKWGA2JL3AZ5TA/bundle.json","state":"https://pith.science/pith/QUFYZ5H6BHNANKWGA2JL3AZ5TA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QUFYZ5H6BHNANKWGA2JL3AZ5TA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:QUFYZ5H6BHNANKWGA2JL3AZ5TA","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":"0b126d3154c25d5ea984eb03801f7470c2f1bcf7a10c3f10a314053ea7728a46","cross_cats_sorted":["cs.CR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2017-10-17T20:22:17Z","title_canon_sha256":"eff2318a954ec22ddb5eb894d7483742345aa32a11cd69170d091c297d59f29a"},"schema_version":"1.0","source":{"id":"1710.06494","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1710.06494","created_at":"2026-05-17T23:51:21Z"},{"alias_kind":"arxiv_version","alias_value":"1710.06494v2","created_at":"2026-05-17T23:51:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.06494","created_at":"2026-05-17T23:51:21Z"},{"alias_kind":"pith_short_12","alias_value":"QUFYZ5H6BHNA","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"QUFYZ5H6BHNANKWG","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"QUFYZ5H6","created_at":"2026-05-18T12:31:39Z"}],"graph_snapshots":[{"event_id":"sha256:b4f0e58fb9dea8a1467e36ea47250a74ae3d6039b7d05d8a3f83c7ce02d6be36","target":"graph","created_at":"2026-05-17T23:51:21Z","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":"In this paper we propose a formal framework for studying privacy in information systems. The proposal follows a two-axes schema where the first axis considers privacy as a taxonomy of rights and the second axis involves the ways an information system stores and manipulates information. We develop a correspondence between the above schema and an associated model of computation. In particular, we propose the \\Pcalc, a calculus based on the $\\pi$-calculus with groups extended with constructs for reasoning about private data. The privacy requirements of an information system are captured via a pri","authors_text":"Anna Philippou, Dimitrios Kouzapas","cross_cats":["cs.CR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2017-10-17T20:22:17Z","title":"Privacy by typing in the $\\pi$-calculus"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.06494","kind":"arxiv","version":2},"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":"sha256:6926b7d1f9d2885f5138605995d478329d40d8c87a57076876d49fc5912465f6","target":"record","created_at":"2026-05-17T23:51:21Z","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":"0b126d3154c25d5ea984eb03801f7470c2f1bcf7a10c3f10a314053ea7728a46","cross_cats_sorted":["cs.CR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2017-10-17T20:22:17Z","title_canon_sha256":"eff2318a954ec22ddb5eb894d7483742345aa32a11cd69170d091c297d59f29a"},"schema_version":"1.0","source":{"id":"1710.06494","kind":"arxiv","version":2}},"canonical_sha256":"850b8cf4fe09da06aac60692bd833d98231b7e624cea4f500a97c2590bc7f026","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"850b8cf4fe09da06aac60692bd833d98231b7e624cea4f500a97c2590bc7f026","first_computed_at":"2026-05-17T23:51:21.502562Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:21.502562Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7tDadav+ZT8awKv9foqj210/Fwzueoa3yAsEK0lv17gaHrffzEYvF26BFn0kOxsFTxElOBYpihmW9s3LvetBDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:21.503204Z","signed_message":"canonical_sha256_bytes"},"source_id":"1710.06494","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6926b7d1f9d2885f5138605995d478329d40d8c87a57076876d49fc5912465f6","sha256:b4f0e58fb9dea8a1467e36ea47250a74ae3d6039b7d05d8a3f83c7ce02d6be36"],"state_sha256":"6fe438fe89c4a8be4539dbac089b3f36bd0dc9b42e010c475f5ef738fb5dd743"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HSzDptoFEGKHOSBv9ZKv5y0q4Oj14PG8DMBnzr4YflU8wHcYEQ29o3oiIKacVJlAZu3G/R5+v7VSTh1bdIHGDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T16:33:20.703058Z","bundle_sha256":"35242ad55bd95600d1a5fefc1758d984081de921c648feacc68ecfb153d8d09f"}}