{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:2BY7FQJB4RNZT7TYOQV3SK4HUZ","short_pith_number":"pith:2BY7FQJB","canonical_record":{"source":{"id":"1412.7677","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2014-12-24T14:49:14Z","cross_cats_sorted":[],"title_canon_sha256":"5ed038d1b9e9c71301af019e3c6d8baf5a9dbe3fbbeac8ca0233f9facb569791","abstract_canon_sha256":"b808f12ffe50b1855ae98962eac505fb7eda233856e6d36953d419a386043c65"},"schema_version":"1.0"},"canonical_sha256":"d071f2c121e45b99fe78742bb92b87a659265c4cb507a6c288aab21e900473b7","source":{"kind":"arxiv","id":"1412.7677","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.7677","created_at":"2026-05-18T02:30:33Z"},{"alias_kind":"arxiv_version","alias_value":"1412.7677v1","created_at":"2026-05-18T02:30:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.7677","created_at":"2026-05-18T02:30:33Z"},{"alias_kind":"pith_short_12","alias_value":"2BY7FQJB4RNZ","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_16","alias_value":"2BY7FQJB4RNZT7TY","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_8","alias_value":"2BY7FQJB","created_at":"2026-05-18T12:28:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:2BY7FQJB4RNZT7TYOQV3SK4HUZ","target":"record","payload":{"canonical_record":{"source":{"id":"1412.7677","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2014-12-24T14:49:14Z","cross_cats_sorted":[],"title_canon_sha256":"5ed038d1b9e9c71301af019e3c6d8baf5a9dbe3fbbeac8ca0233f9facb569791","abstract_canon_sha256":"b808f12ffe50b1855ae98962eac505fb7eda233856e6d36953d419a386043c65"},"schema_version":"1.0"},"canonical_sha256":"d071f2c121e45b99fe78742bb92b87a659265c4cb507a6c288aab21e900473b7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:30:33.288366Z","signature_b64":"aGAUCJgQB1yxCHhObvPOkx3Ohw0uJWPSqWSZ6VSDaZYCQDqEzM66h7u/qkrxPzokX9IIhQ9cUcTdHxemkl1vAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d071f2c121e45b99fe78742bb92b87a659265c4cb507a6c288aab21e900473b7","last_reissued_at":"2026-05-18T02:30:33.287864Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:30:33.287864Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1412.7677","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":"2026-05-18T02:30:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sF1GiuBeyzMWVdJoua7QT2bOOy1yqNMY5evbyoCw9DEXg7WnkAs4Ge3BJRDicKW9r6jzWsUUcQz2N5/eOIIFCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T15:46:46.050079Z"},"content_sha256":"12347a03a1b7ee424c53c0b5bc8c58665161216f4993e41bb35f0e7c340f6eb7","schema_version":"1.0","event_id":"sha256:12347a03a1b7ee424c53c0b5bc8c58665161216f4993e41bb35f0e7c340f6eb7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:2BY7FQJB4RNZT7TYOQV3SK4HUZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"LineCAPTCHA Mobile: A User Friendly Replacement for Unfriendly Reverse Turing Tests for Mobile Devices (ICIAfS14)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.HC","authors_text":"C.B Bulumulla, R. G. Ragel","submitted_at":"2014-12-24T14:49:14Z","abstract_excerpt":"As smart phones and tablets are becoming ubiquitous and taking over as the primary choice for accessing the Internet worldwide, ensuring a secure gateway to the servers serving such devices become essential. CAPTCHAs play an important role in identifying human users in internet to prevent unauthorized bot attacks. Even though there are numerous CAPTCHA alternatives available today, there are certain drawbacks attached with each alternative, making them harder to find a general solution for the necessity of a CAPTCHA mechanism. With the advancing technology and expertise in areas such as AI, cr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.7677","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":"2026-05-18T02:30:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CbRQoXc/Al+g/AOv68ABFq6CJl+5jkUyEZ14zAnRakWUP26Oqye99iTpMpfYfA9+sKyREHydlD9iEERba43cAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T15:46:46.050752Z"},"content_sha256":"d795066ec783964f0468cddffda7bfbcd632d0c5df339167d23707969cdb3fa4","schema_version":"1.0","event_id":"sha256:d795066ec783964f0468cddffda7bfbcd632d0c5df339167d23707969cdb3fa4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2BY7FQJB4RNZT7TYOQV3SK4HUZ/bundle.json","state_url":"https://pith.science/pith/2BY7FQJB4RNZT7TYOQV3SK4HUZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2BY7FQJB4RNZT7TYOQV3SK4HUZ/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":"2026-05-26T15:46:46Z","links":{"resolver":"https://pith.science/pith/2BY7FQJB4RNZT7TYOQV3SK4HUZ","bundle":"https://pith.science/pith/2BY7FQJB4RNZT7TYOQV3SK4HUZ/bundle.json","state":"https://pith.science/pith/2BY7FQJB4RNZT7TYOQV3SK4HUZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2BY7FQJB4RNZT7TYOQV3SK4HUZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:2BY7FQJB4RNZT7TYOQV3SK4HUZ","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":"b808f12ffe50b1855ae98962eac505fb7eda233856e6d36953d419a386043c65","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2014-12-24T14:49:14Z","title_canon_sha256":"5ed038d1b9e9c71301af019e3c6d8baf5a9dbe3fbbeac8ca0233f9facb569791"},"schema_version":"1.0","source":{"id":"1412.7677","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.7677","created_at":"2026-05-18T02:30:33Z"},{"alias_kind":"arxiv_version","alias_value":"1412.7677v1","created_at":"2026-05-18T02:30:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.7677","created_at":"2026-05-18T02:30:33Z"},{"alias_kind":"pith_short_12","alias_value":"2BY7FQJB4RNZ","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_16","alias_value":"2BY7FQJB4RNZT7TY","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_8","alias_value":"2BY7FQJB","created_at":"2026-05-18T12:28:09Z"}],"graph_snapshots":[{"event_id":"sha256:d795066ec783964f0468cddffda7bfbcd632d0c5df339167d23707969cdb3fa4","target":"graph","created_at":"2026-05-18T02:30:33Z","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":"As smart phones and tablets are becoming ubiquitous and taking over as the primary choice for accessing the Internet worldwide, ensuring a secure gateway to the servers serving such devices become essential. CAPTCHAs play an important role in identifying human users in internet to prevent unauthorized bot attacks. Even though there are numerous CAPTCHA alternatives available today, there are certain drawbacks attached with each alternative, making them harder to find a general solution for the necessity of a CAPTCHA mechanism. With the advancing technology and expertise in areas such as AI, cr","authors_text":"C.B Bulumulla, R. G. Ragel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2014-12-24T14:49:14Z","title":"LineCAPTCHA Mobile: A User Friendly Replacement for Unfriendly Reverse Turing Tests for Mobile Devices (ICIAfS14)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.7677","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":"sha256:12347a03a1b7ee424c53c0b5bc8c58665161216f4993e41bb35f0e7c340f6eb7","target":"record","created_at":"2026-05-18T02:30:33Z","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":"b808f12ffe50b1855ae98962eac505fb7eda233856e6d36953d419a386043c65","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2014-12-24T14:49:14Z","title_canon_sha256":"5ed038d1b9e9c71301af019e3c6d8baf5a9dbe3fbbeac8ca0233f9facb569791"},"schema_version":"1.0","source":{"id":"1412.7677","kind":"arxiv","version":1}},"canonical_sha256":"d071f2c121e45b99fe78742bb92b87a659265c4cb507a6c288aab21e900473b7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d071f2c121e45b99fe78742bb92b87a659265c4cb507a6c288aab21e900473b7","first_computed_at":"2026-05-18T02:30:33.287864Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:30:33.287864Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aGAUCJgQB1yxCHhObvPOkx3Ohw0uJWPSqWSZ6VSDaZYCQDqEzM66h7u/qkrxPzokX9IIhQ9cUcTdHxemkl1vAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:30:33.288366Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.7677","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:12347a03a1b7ee424c53c0b5bc8c58665161216f4993e41bb35f0e7c340f6eb7","sha256:d795066ec783964f0468cddffda7bfbcd632d0c5df339167d23707969cdb3fa4"],"state_sha256":"8c358fe10b57c5123fdbcd79e2d2a4036ec72dbb38895ce49a4c1f9491b015b4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wFzg23EDdI0xR5PCSTKhHN8zHJlEhBLdMARNRjIgO4sCdla7IpjShRyrCPjRzEj2xETEH5Kn/zle0xpX3/e2BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T15:46:46.053162Z","bundle_sha256":"f86b5b1d628af72b5252cd56e03c14a920f5853da78d164e7c8c68a32061e950"}}