{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:CIDF4ZHQP7RJBNLZZO4KFFWIVB","short_pith_number":"pith:CIDF4ZHQ","canonical_record":{"source":{"id":"1312.2451","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"cs.LG","submitted_at":"2013-12-06T18:25:15Z","cross_cats_sorted":[],"title_canon_sha256":"d943dd937eca0f342b354b54964203564f90a3cf60a8742bfcee897b54dfc343","abstract_canon_sha256":"2ed868ea45614f36183710eeb8d747f5e3019fd03d4b8a72d246e721173de8f1"},"schema_version":"1.0"},"canonical_sha256":"12065e64f07fe290b579cbb8a296c8a8466a6575799d2faa6266c44d508f3fe8","source":{"kind":"arxiv","id":"1312.2451","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.2451","created_at":"2026-05-18T03:05:10Z"},{"alias_kind":"arxiv_version","alias_value":"1312.2451v1","created_at":"2026-05-18T03:05:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.2451","created_at":"2026-05-18T03:05:10Z"},{"alias_kind":"pith_short_12","alias_value":"CIDF4ZHQP7RJ","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"CIDF4ZHQP7RJBNLZ","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"CIDF4ZHQ","created_at":"2026-05-18T12:27:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:CIDF4ZHQP7RJBNLZZO4KFFWIVB","target":"record","payload":{"canonical_record":{"source":{"id":"1312.2451","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"cs.LG","submitted_at":"2013-12-06T18:25:15Z","cross_cats_sorted":[],"title_canon_sha256":"d943dd937eca0f342b354b54964203564f90a3cf60a8742bfcee897b54dfc343","abstract_canon_sha256":"2ed868ea45614f36183710eeb8d747f5e3019fd03d4b8a72d246e721173de8f1"},"schema_version":"1.0"},"canonical_sha256":"12065e64f07fe290b579cbb8a296c8a8466a6575799d2faa6266c44d508f3fe8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:05:10.267553Z","signature_b64":"HbY2vkLYCCrvtwRJNCSaIQnGKpiZbrdYhFhKQ4jidIdKUBVzmtl0seUF3xhoAevGiN33uOVfRsW0yCd9PtgYAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"12065e64f07fe290b579cbb8a296c8a8466a6575799d2faa6266c44d508f3fe8","last_reissued_at":"2026-05-18T03:05:10.267034Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:05:10.267034Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1312.2451","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":"2026-05-18T03:05:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jP8LAQFD7QwWFWETcIejWk8AhlAxxn6YVEXfnWrJFlMlk7zKxaIiJ1JZYY4ZqQjnHrFnyAMh1MiT9bYisswECw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:26:31.965973Z"},"content_sha256":"a5848ee9d711ebebcfdfac6c163f2560dcd1fd0c2aa64c68a0c18f677f18feeb","schema_version":"1.0","event_id":"sha256:a5848ee9d711ebebcfdfac6c163f2560dcd1fd0c2aa64c68a0c18f677f18feeb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:CIDF4ZHQP7RJBNLZZO4KFFWIVB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"CEAI: CCM based Email Authorship Identification Model","license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","headline":"","cross_cats":[],"primary_cat":"cs.LG","authors_text":"Nasrullah Memon, Sarwat Nizamani","submitted_at":"2013-12-06T18:25:15Z","abstract_excerpt":"In this paper we present a model for email authorship identification (EAI) by employing a Cluster-based Classification (CCM) technique. Traditionally, stylometric features have been successfully employed in various authorship analysis tasks; we extend the traditional feature-set to include some more interesting and effective features for email authorship identification (e.g. the last punctuation mark used in an email, the tendency of an author to use capitalization at the start of an email, or the punctuation after a greeting or farewell). We also included Info Gain feature selection based con"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.2451","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":"2026-05-18T03:05:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GSvwiY6SAqk2CFSnYtYiMOVmhAk+Ycy2oi8t+nl5ks4dIHAmX2gS45aCF0TEBDGRVsCBgmBD2auLixVWK8mmAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:26:31.966327Z"},"content_sha256":"91fd0e504d57a12e9d3d2cf9d8c6e76d10ef0efef54b41fa734f4b57faaa5854","schema_version":"1.0","event_id":"sha256:91fd0e504d57a12e9d3d2cf9d8c6e76d10ef0efef54b41fa734f4b57faaa5854"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CIDF4ZHQP7RJBNLZZO4KFFWIVB/bundle.json","state_url":"https://pith.science/pith/CIDF4ZHQP7RJBNLZZO4KFFWIVB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CIDF4ZHQP7RJBNLZZO4KFFWIVB/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":"2026-06-02T23:26:31Z","links":{"resolver":"https://pith.science/pith/CIDF4ZHQP7RJBNLZZO4KFFWIVB","bundle":"https://pith.science/pith/CIDF4ZHQP7RJBNLZZO4KFFWIVB/bundle.json","state":"https://pith.science/pith/CIDF4ZHQP7RJBNLZZO4KFFWIVB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CIDF4ZHQP7RJBNLZZO4KFFWIVB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:CIDF4ZHQP7RJBNLZZO4KFFWIVB","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":"2ed868ea45614f36183710eeb8d747f5e3019fd03d4b8a72d246e721173de8f1","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"cs.LG","submitted_at":"2013-12-06T18:25:15Z","title_canon_sha256":"d943dd937eca0f342b354b54964203564f90a3cf60a8742bfcee897b54dfc343"},"schema_version":"1.0","source":{"id":"1312.2451","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.2451","created_at":"2026-05-18T03:05:10Z"},{"alias_kind":"arxiv_version","alias_value":"1312.2451v1","created_at":"2026-05-18T03:05:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.2451","created_at":"2026-05-18T03:05:10Z"},{"alias_kind":"pith_short_12","alias_value":"CIDF4ZHQP7RJ","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"CIDF4ZHQP7RJBNLZ","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"CIDF4ZHQ","created_at":"2026-05-18T12:27:40Z"}],"graph_snapshots":[{"event_id":"sha256:91fd0e504d57a12e9d3d2cf9d8c6e76d10ef0efef54b41fa734f4b57faaa5854","target":"graph","created_at":"2026-05-18T03:05:10Z","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 present a model for email authorship identification (EAI) by employing a Cluster-based Classification (CCM) technique. Traditionally, stylometric features have been successfully employed in various authorship analysis tasks; we extend the traditional feature-set to include some more interesting and effective features for email authorship identification (e.g. the last punctuation mark used in an email, the tendency of an author to use capitalization at the start of an email, or the punctuation after a greeting or farewell). We also included Info Gain feature selection based con","authors_text":"Nasrullah Memon, Sarwat Nizamani","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"cs.LG","submitted_at":"2013-12-06T18:25:15Z","title":"CEAI: CCM based Email Authorship Identification Model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.2451","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:a5848ee9d711ebebcfdfac6c163f2560dcd1fd0c2aa64c68a0c18f677f18feeb","target":"record","created_at":"2026-05-18T03:05:10Z","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":"2ed868ea45614f36183710eeb8d747f5e3019fd03d4b8a72d246e721173de8f1","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"cs.LG","submitted_at":"2013-12-06T18:25:15Z","title_canon_sha256":"d943dd937eca0f342b354b54964203564f90a3cf60a8742bfcee897b54dfc343"},"schema_version":"1.0","source":{"id":"1312.2451","kind":"arxiv","version":1}},"canonical_sha256":"12065e64f07fe290b579cbb8a296c8a8466a6575799d2faa6266c44d508f3fe8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"12065e64f07fe290b579cbb8a296c8a8466a6575799d2faa6266c44d508f3fe8","first_computed_at":"2026-05-18T03:05:10.267034Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:05:10.267034Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HbY2vkLYCCrvtwRJNCSaIQnGKpiZbrdYhFhKQ4jidIdKUBVzmtl0seUF3xhoAevGiN33uOVfRsW0yCd9PtgYAw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:05:10.267553Z","signed_message":"canonical_sha256_bytes"},"source_id":"1312.2451","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a5848ee9d711ebebcfdfac6c163f2560dcd1fd0c2aa64c68a0c18f677f18feeb","sha256:91fd0e504d57a12e9d3d2cf9d8c6e76d10ef0efef54b41fa734f4b57faaa5854"],"state_sha256":"acd78fc056026614d024afb1b8f093e185c362bae97928f14284cef2eee65531"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ONrgsw1hRswVuN/nc4hVJ0hlDZb20BmY4ILqehRu7pMXvBQnzkXkIoTc7GXX/80sUY0jH5U74cYTa0vr0MyaCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T23:26:31.968275Z","bundle_sha256":"4b55da2ea2fc9294b3b0072329f41ad51ae555db74e6adfa8e96703085d6f9ca"}}