{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:OSIQN4Q42X2UYSZM6QBQ33WLSI","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":"683f120762e268a6c96eaf77e4800249c21bbb116603224fd70d4ce1b4af6d1e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2012-12-14T00:04:06Z","title_canon_sha256":"9ae45dbcd5423c7dae3f6a1ab7804669d15a591915fe1034e5cf3e60fcc1926b"},"schema_version":"1.0","source":{"id":"1212.3371","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.3371","created_at":"2026-05-18T03:38:24Z"},{"alias_kind":"arxiv_version","alias_value":"1212.3371v1","created_at":"2026-05-18T03:38:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.3371","created_at":"2026-05-18T03:38:24Z"},{"alias_kind":"pith_short_12","alias_value":"OSIQN4Q42X2U","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"OSIQN4Q42X2UYSZM","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"OSIQN4Q4","created_at":"2026-05-18T12:27:16Z"}],"graph_snapshots":[{"event_id":"sha256:2f847b9a8a833e4a5ae9ec9deaf9225338b2f9226ff5a7813ed1419818a5a125","target":"graph","created_at":"2026-05-18T03:38:24Z","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 a novel data embedding technique in frequency domain has been proposed using Discrete Fourier Transform (DFT) for image authentication and secured message transmission based on hiding a large volume of data into gray images. Image authentication is done by embedding message or image in frequency domain by choosing image blocks of size 2 x 2, called mask, from the source image in row major order and transform it into the frequency domain using DFT. Three bits of authenticating message/image/message-digest are fabricated within the real parts of each source image byte except first ","authors_text":"J. K. Mandal, Nabin Ghoshal","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2012-12-14T00:04:06Z","title":"Image Authentication Technique in Frequency Domain based on Discrete Fourier Transformation (IATFDDFT)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.3371","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":"sha256:9090814381739012f9e9e499e98b3bdac57e2e3083c3d1196c7749f5dc85cfc1","target":"record","created_at":"2026-05-18T03:38:24Z","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":"683f120762e268a6c96eaf77e4800249c21bbb116603224fd70d4ce1b4af6d1e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2012-12-14T00:04:06Z","title_canon_sha256":"9ae45dbcd5423c7dae3f6a1ab7804669d15a591915fe1034e5cf3e60fcc1926b"},"schema_version":"1.0","source":{"id":"1212.3371","kind":"arxiv","version":1}},"canonical_sha256":"749106f21cd5f54c4b2cf4030deecb920846651a7190165a8b78fd19cce4c406","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"749106f21cd5f54c4b2cf4030deecb920846651a7190165a8b78fd19cce4c406","first_computed_at":"2026-05-18T03:38:24.836262Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:38:24.836262Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"47JLTK5Z9G3H6bjGDakg7pI0ODfD5DLyJyBx4agvmJ3PdvYQwsZ+odunJkQkxMD1jEH671PPDOltrpFKeaU3CA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:38:24.836750Z","signed_message":"canonical_sha256_bytes"},"source_id":"1212.3371","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9090814381739012f9e9e499e98b3bdac57e2e3083c3d1196c7749f5dc85cfc1","sha256:2f847b9a8a833e4a5ae9ec9deaf9225338b2f9226ff5a7813ed1419818a5a125"],"state_sha256":"38ed488c1b04ff34e122793c644f75b91f2f3d3d3e8fb295ac5ae1b6d408efc1"}