{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:B3DGJCMVIPOFTTN34AEK2C36GL","short_pith_number":"pith:B3DGJCMV","canonical_record":{"source":{"id":"1605.08808","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CR","submitted_at":"2016-05-27T21:50:24Z","cross_cats_sorted":[],"title_canon_sha256":"712d44fe695c05b9ab44b2312545746e020a8f8e31ba5eb2527d3da0c743a566","abstract_canon_sha256":"3822167ce184f4f5d1b81cfbfb208c85d4943104cc0d8d266c9a17a5ad8c8e6f"},"schema_version":"1.0"},"canonical_sha256":"0ec664899543dc59cdbbe008ad0b7e32cd9654dff0dbc0e2cd9efbedee116f7e","source":{"kind":"arxiv","id":"1605.08808","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.08808","created_at":"2026-05-18T01:10:45Z"},{"alias_kind":"arxiv_version","alias_value":"1605.08808v2","created_at":"2026-05-18T01:10:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.08808","created_at":"2026-05-18T01:10:45Z"},{"alias_kind":"pith_short_12","alias_value":"B3DGJCMVIPOF","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_16","alias_value":"B3DGJCMVIPOFTTN3","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_8","alias_value":"B3DGJCMV","created_at":"2026-05-18T12:30:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:B3DGJCMVIPOFTTN34AEK2C36GL","target":"record","payload":{"canonical_record":{"source":{"id":"1605.08808","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CR","submitted_at":"2016-05-27T21:50:24Z","cross_cats_sorted":[],"title_canon_sha256":"712d44fe695c05b9ab44b2312545746e020a8f8e31ba5eb2527d3da0c743a566","abstract_canon_sha256":"3822167ce184f4f5d1b81cfbfb208c85d4943104cc0d8d266c9a17a5ad8c8e6f"},"schema_version":"1.0"},"canonical_sha256":"0ec664899543dc59cdbbe008ad0b7e32cd9654dff0dbc0e2cd9efbedee116f7e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:10:45.507535Z","signature_b64":"6384Zbh2gKbXPtxloZ35xbewEB93u+Ez7wxRrHD3fHchpzrRtk8CXMM7cFjwqSdar1JjCzJCbT/Jz9m+ymJ+Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0ec664899543dc59cdbbe008ad0b7e32cd9654dff0dbc0e2cd9efbedee116f7e","last_reissued_at":"2026-05-18T01:10:45.507088Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:10:45.507088Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1605.08808","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":"2026-05-18T01:10:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DQ65Ray4nyJEuhX4W1lOBoK3kL68GPsuZFAEv+jvsesXxKpm5Nn9MHoi7Lkb5t29MdMTygG1XUdBJbEbFRxEBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T15:43:24.828739Z"},"content_sha256":"759e7dd31ecf21972403d514785fa86018f25c79ebeac24722bcdd911ce7e00b","schema_version":"1.0","event_id":"sha256:759e7dd31ecf21972403d514785fa86018f25c79ebeac24722bcdd911ce7e00b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:B3DGJCMVIPOFTTN34AEK2C36GL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Censors' Delay in Blocking Circumvention Proxies","license":"http://creativecommons.org/publicdomain/zero/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CR","authors_text":"David Fifield, Lynn Tsai","submitted_at":"2016-05-27T21:50:24Z","abstract_excerpt":"Censors of the Internet must continually discover and block new circumvention proxy servers. We seek to understand this process; specifically, the length of the delay between when a proxy first becomes discoverable and when it is actually blocked. We measure this delay in the case of obfuscated Tor bridges, by testing their reachability before and after their introduction into Tor Browser. We test from sites in the U.S., China, and Iran, over a period of five months. China's national firewall blocked new bridges after a varying delay of between 2 and 36 days. Blocking occurred only after end-u"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.08808","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":"2026-05-18T01:10:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PwaS7SaRbiyB5yFuuf5vDWwJncslEj1mciNMp/g5oQduwqxCCGODr9dkx6uxF/r53pKSLT/pfsTrybgqGVvSDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T15:43:24.829104Z"},"content_sha256":"481693243e0ade97b3f079fb55b0b33b3ea255f5e002b170101ae44bd63f54dd","schema_version":"1.0","event_id":"sha256:481693243e0ade97b3f079fb55b0b33b3ea255f5e002b170101ae44bd63f54dd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/B3DGJCMVIPOFTTN34AEK2C36GL/bundle.json","state_url":"https://pith.science/pith/B3DGJCMVIPOFTTN34AEK2C36GL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/B3DGJCMVIPOFTTN34AEK2C36GL/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":"2026-06-05T15:43:24Z","links":{"resolver":"https://pith.science/pith/B3DGJCMVIPOFTTN34AEK2C36GL","bundle":"https://pith.science/pith/B3DGJCMVIPOFTTN34AEK2C36GL/bundle.json","state":"https://pith.science/pith/B3DGJCMVIPOFTTN34AEK2C36GL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/B3DGJCMVIPOFTTN34AEK2C36GL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:B3DGJCMVIPOFTTN34AEK2C36GL","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":"3822167ce184f4f5d1b81cfbfb208c85d4943104cc0d8d266c9a17a5ad8c8e6f","cross_cats_sorted":[],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CR","submitted_at":"2016-05-27T21:50:24Z","title_canon_sha256":"712d44fe695c05b9ab44b2312545746e020a8f8e31ba5eb2527d3da0c743a566"},"schema_version":"1.0","source":{"id":"1605.08808","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.08808","created_at":"2026-05-18T01:10:45Z"},{"alias_kind":"arxiv_version","alias_value":"1605.08808v2","created_at":"2026-05-18T01:10:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.08808","created_at":"2026-05-18T01:10:45Z"},{"alias_kind":"pith_short_12","alias_value":"B3DGJCMVIPOF","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_16","alias_value":"B3DGJCMVIPOFTTN3","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_8","alias_value":"B3DGJCMV","created_at":"2026-05-18T12:30:07Z"}],"graph_snapshots":[{"event_id":"sha256:481693243e0ade97b3f079fb55b0b33b3ea255f5e002b170101ae44bd63f54dd","target":"graph","created_at":"2026-05-18T01:10:45Z","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"},"paper":{"abstract_excerpt":"Censors of the Internet must continually discover and block new circumvention proxy servers. We seek to understand this process; specifically, the length of the delay between when a proxy first becomes discoverable and when it is actually blocked. We measure this delay in the case of obfuscated Tor bridges, by testing their reachability before and after their introduction into Tor Browser. We test from sites in the U.S., China, and Iran, over a period of five months. China's national firewall blocked new bridges after a varying delay of between 2 and 36 days. Blocking occurred only after end-u","authors_text":"David Fifield, Lynn Tsai","cross_cats":[],"headline":"","license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CR","submitted_at":"2016-05-27T21:50:24Z","title":"Censors' Delay in Blocking Circumvention Proxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.08808","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":"sha256:759e7dd31ecf21972403d514785fa86018f25c79ebeac24722bcdd911ce7e00b","target":"record","created_at":"2026-05-18T01:10:45Z","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":"3822167ce184f4f5d1b81cfbfb208c85d4943104cc0d8d266c9a17a5ad8c8e6f","cross_cats_sorted":[],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CR","submitted_at":"2016-05-27T21:50:24Z","title_canon_sha256":"712d44fe695c05b9ab44b2312545746e020a8f8e31ba5eb2527d3da0c743a566"},"schema_version":"1.0","source":{"id":"1605.08808","kind":"arxiv","version":2}},"canonical_sha256":"0ec664899543dc59cdbbe008ad0b7e32cd9654dff0dbc0e2cd9efbedee116f7e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0ec664899543dc59cdbbe008ad0b7e32cd9654dff0dbc0e2cd9efbedee116f7e","first_computed_at":"2026-05-18T01:10:45.507088Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:10:45.507088Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6384Zbh2gKbXPtxloZ35xbewEB93u+Ez7wxRrHD3fHchpzrRtk8CXMM7cFjwqSdar1JjCzJCbT/Jz9m+ymJ+Ag==","signature_status":"signed_v1","signed_at":"2026-05-18T01:10:45.507535Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.08808","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:759e7dd31ecf21972403d514785fa86018f25c79ebeac24722bcdd911ce7e00b","sha256:481693243e0ade97b3f079fb55b0b33b3ea255f5e002b170101ae44bd63f54dd"],"state_sha256":"ff3d7b3fbab5fe1817fb4761be7f412de6ce2e926c14afff4959b4c4641e2673"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kby49Cgl1tN0PCPiehSEyMJSJaVrH9ww9QxWoJLbzUVbjCO1iXNGy4zR0LYUUIY2GmOFdIFDs1N+hXZUY5VCDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T15:43:24.831144Z","bundle_sha256":"57775542bd4ff298687d0228dede6cdd1c900bcd69538585ec7b72e207b6eed6"}}