{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:FY7PWNWCD7QSUT6VD6WWPLGEBQ","short_pith_number":"pith:FY7PWNWC","canonical_record":{"source":{"id":"2605.21948","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-05-21T03:28:06Z","cross_cats_sorted":[],"title_canon_sha256":"68138762df635d7daca0f2fe67d665bf65f6864d7198fedcbc56db64cd017d9a","abstract_canon_sha256":"ac7c5233e02fb8e1a32d2cfbab179bb51b092e26321087da6e42744b09923803"},"schema_version":"1.0"},"canonical_sha256":"2e3efb36c21fe12a4fd51fad67acc40c048d7f5ac394a0b7b6b78a47ba2adbdd","source":{"kind":"arxiv","id":"2605.21948","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.21948","created_at":"2026-05-22T01:04:16Z"},{"alias_kind":"arxiv_version","alias_value":"2605.21948v1","created_at":"2026-05-22T01:04:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.21948","created_at":"2026-05-22T01:04:16Z"},{"alias_kind":"pith_short_12","alias_value":"FY7PWNWCD7QS","created_at":"2026-05-22T01:04:16Z"},{"alias_kind":"pith_short_16","alias_value":"FY7PWNWCD7QSUT6V","created_at":"2026-05-22T01:04:16Z"},{"alias_kind":"pith_short_8","alias_value":"FY7PWNWC","created_at":"2026-05-22T01:04:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:FY7PWNWCD7QSUT6VD6WWPLGEBQ","target":"record","payload":{"canonical_record":{"source":{"id":"2605.21948","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-05-21T03:28:06Z","cross_cats_sorted":[],"title_canon_sha256":"68138762df635d7daca0f2fe67d665bf65f6864d7198fedcbc56db64cd017d9a","abstract_canon_sha256":"ac7c5233e02fb8e1a32d2cfbab179bb51b092e26321087da6e42744b09923803"},"schema_version":"1.0"},"canonical_sha256":"2e3efb36c21fe12a4fd51fad67acc40c048d7f5ac394a0b7b6b78a47ba2adbdd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-22T01:04:16.361296Z","signature_b64":"te+bjHxbgq/B1VCOva3cV2wt6doyR4+Ao5z5tgMHK38ZhahiBR3/jVqbttrXa73vWSJ6KNxvwH6bOjUB40sVAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2e3efb36c21fe12a4fd51fad67acc40c048d7f5ac394a0b7b6b78a47ba2adbdd","last_reissued_at":"2026-05-22T01:04:16.360509Z","signature_status":"signed_v1","first_computed_at":"2026-05-22T01:04:16.360509Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2605.21948","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":"2026-05-22T01:04:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vGpbuI5oRE0p+p5m3KdsiJZ6/zJL2y9ZtbA0eXOLpuiynlJ0TKIXYdF8zudJB4G+/1tgARwoLDws8TanBU+jDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T07:29:41.666457Z"},"content_sha256":"be38274a775cb1251ae25248c3c5b9f9c52919f958de0504a946f75bf977da75","schema_version":"1.0","event_id":"sha256:be38274a775cb1251ae25248c3c5b9f9c52919f958de0504a946f75bf977da75"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:FY7PWNWCD7QSUT6VD6WWPLGEBQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SCI-Defense: Defending Manipulation Attacks from Generative Engine Optimization","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.LG","authors_text":"Haibo Jin, Haohan Wang, Huimin Zeng, Xucheng Yu","submitted_at":"2026-05-21T03:28:06Z","abstract_excerpt":"LLM-based ranking systems are vulnerable to Generative Engine Optimization (GEO) attacks, where adversaries inject semantic signals into product descriptions to artificially boost rankings. We propose SCI-Defense, a three-component defense framework combining Perplexity detection (PPL), Semantic Integrity Scoring (SIS), and Inter-Candidate Detection (ICD). SIS evaluates four manipulation dimensions: Authority Attribution (AA), Narrative Purposiveness (NP), Comparative Claims (CA), and Temporal Claims (TC). Evaluated on 600 Amazon product descriptions across 6 categories, SCI-Defense achieves P"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.21948","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.21948/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-05-22T01:04:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"t7UWwAyS5+KmGO7+wnm+eDunEmcqdYR/6IDcx8+iwtSPARFJbme+cg+IJE10/UxKU3ctP/AUUFd43PfUH6nQAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T07:29:41.667026Z"},"content_sha256":"671e672694b124360a8681331a8abed455d625cafc8b743c05e5bbd5b6a34d20","schema_version":"1.0","event_id":"sha256:671e672694b124360a8681331a8abed455d625cafc8b743c05e5bbd5b6a34d20"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FY7PWNWCD7QSUT6VD6WWPLGEBQ/bundle.json","state_url":"https://pith.science/pith/FY7PWNWCD7QSUT6VD6WWPLGEBQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FY7PWNWCD7QSUT6VD6WWPLGEBQ/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":"2026-05-31T07:29:41Z","links":{"resolver":"https://pith.science/pith/FY7PWNWCD7QSUT6VD6WWPLGEBQ","bundle":"https://pith.science/pith/FY7PWNWCD7QSUT6VD6WWPLGEBQ/bundle.json","state":"https://pith.science/pith/FY7PWNWCD7QSUT6VD6WWPLGEBQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FY7PWNWCD7QSUT6VD6WWPLGEBQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:FY7PWNWCD7QSUT6VD6WWPLGEBQ","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":"ac7c5233e02fb8e1a32d2cfbab179bb51b092e26321087da6e42744b09923803","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-05-21T03:28:06Z","title_canon_sha256":"68138762df635d7daca0f2fe67d665bf65f6864d7198fedcbc56db64cd017d9a"},"schema_version":"1.0","source":{"id":"2605.21948","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.21948","created_at":"2026-05-22T01:04:16Z"},{"alias_kind":"arxiv_version","alias_value":"2605.21948v1","created_at":"2026-05-22T01:04:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.21948","created_at":"2026-05-22T01:04:16Z"},{"alias_kind":"pith_short_12","alias_value":"FY7PWNWCD7QS","created_at":"2026-05-22T01:04:16Z"},{"alias_kind":"pith_short_16","alias_value":"FY7PWNWCD7QSUT6V","created_at":"2026-05-22T01:04:16Z"},{"alias_kind":"pith_short_8","alias_value":"FY7PWNWC","created_at":"2026-05-22T01:04:16Z"}],"graph_snapshots":[{"event_id":"sha256:671e672694b124360a8681331a8abed455d625cafc8b743c05e5bbd5b6a34d20","target":"graph","created_at":"2026-05-22T01:04:16Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2605.21948/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"LLM-based ranking systems are vulnerable to Generative Engine Optimization (GEO) attacks, where adversaries inject semantic signals into product descriptions to artificially boost rankings. We propose SCI-Defense, a three-component defense framework combining Perplexity detection (PPL), Semantic Integrity Scoring (SIS), and Inter-Candidate Detection (ICD). SIS evaluates four manipulation dimensions: Authority Attribution (AA), Narrative Purposiveness (NP), Comparative Claims (CA), and Temporal Claims (TC). Evaluated on 600 Amazon product descriptions across 6 categories, SCI-Defense achieves P","authors_text":"Haibo Jin, Haohan Wang, Huimin Zeng, Xucheng Yu","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-05-21T03:28:06Z","title":"SCI-Defense: Defending Manipulation Attacks from Generative Engine Optimization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.21948","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:be38274a775cb1251ae25248c3c5b9f9c52919f958de0504a946f75bf977da75","target":"record","created_at":"2026-05-22T01:04:16Z","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":"ac7c5233e02fb8e1a32d2cfbab179bb51b092e26321087da6e42744b09923803","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-05-21T03:28:06Z","title_canon_sha256":"68138762df635d7daca0f2fe67d665bf65f6864d7198fedcbc56db64cd017d9a"},"schema_version":"1.0","source":{"id":"2605.21948","kind":"arxiv","version":1}},"canonical_sha256":"2e3efb36c21fe12a4fd51fad67acc40c048d7f5ac394a0b7b6b78a47ba2adbdd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2e3efb36c21fe12a4fd51fad67acc40c048d7f5ac394a0b7b6b78a47ba2adbdd","first_computed_at":"2026-05-22T01:04:16.360509Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-22T01:04:16.360509Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"te+bjHxbgq/B1VCOva3cV2wt6doyR4+Ao5z5tgMHK38ZhahiBR3/jVqbttrXa73vWSJ6KNxvwH6bOjUB40sVAw==","signature_status":"signed_v1","signed_at":"2026-05-22T01:04:16.361296Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.21948","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:be38274a775cb1251ae25248c3c5b9f9c52919f958de0504a946f75bf977da75","sha256:671e672694b124360a8681331a8abed455d625cafc8b743c05e5bbd5b6a34d20"],"state_sha256":"a440433b03492e75b1aed319d6220a51052fa7e6aee1ee9838092ba1ad44fdc3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KgS2ZodbymjPbqGczC7WDgvkvWs9v84+7YzpyYzOhl/2QiL5t6uEVZC15ZdKVVBpcpuSSJXHphbUXaz/BsxuAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T07:29:41.671633Z","bundle_sha256":"b345532ed1a309a7f485a7b30d12d9569e00ee6a55cea2ebaa96514585aae245"}}