{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:QSXWJLBBNHAWTXQ7OC5PUZXZFC","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":"db4108cfc657d57f1e0a9e89b93f6d01e1f4f60df86d0cf2255fc9b51048947f","cross_cats_sorted":["cs.CR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-09-15T18:23:15Z","title_canon_sha256":"a09e78a3a2ef8a5fab2a70036859676f864306a461db0000bce1da67e982e0f4"},"schema_version":"1.0","source":{"id":"2109.07517","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.07517","created_at":"2026-07-05T03:45:11Z"},{"alias_kind":"arxiv_version","alias_value":"2109.07517v2","created_at":"2026-07-05T03:45:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.07517","created_at":"2026-07-05T03:45:11Z"},{"alias_kind":"pith_short_12","alias_value":"QSXWJLBBNHAW","created_at":"2026-07-05T03:45:11Z"},{"alias_kind":"pith_short_16","alias_value":"QSXWJLBBNHAWTXQ7","created_at":"2026-07-05T03:45:11Z"},{"alias_kind":"pith_short_8","alias_value":"QSXWJLBB","created_at":"2026-07-05T03:45:11Z"}],"graph_snapshots":[{"event_id":"sha256:cc15ca7987ec3c373cd3d4b79c30c8ccfb8c33a37666226e26fe0fde5c456366","target":"graph","created_at":"2026-07-05T03:45:11Z","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/2109.07517/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Chandran et al. (SIAM J. Comput.'14) formally introduced the cryptographic task of position verification, where they also showed that it cannot be achieved by classical protocols. In this work, we initiate the study of position verification protocols with classical verifiers. We identify that proofs of quantumness (and thus computational assumptions) are necessary for such position verification protocols. For the other direction, we adapt the proof of quantumness protocol by Brakerski et al. (FOCS'18) to instantiate such a position verification protocol. As a result, we achieve classically ver","authors_text":"Jiahui Liu, Luowen Qian, Qipeng Liu","cross_cats":["cs.CR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-09-15T18:23:15Z","title":"Beating Classical Impossibility of Position Verification"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.07517","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:b7e9fca919245076f2c28354ab0bdb81e270d20634a2b83744ca2209f8a4f8e6","target":"record","created_at":"2026-07-05T03:45:11Z","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":"db4108cfc657d57f1e0a9e89b93f6d01e1f4f60df86d0cf2255fc9b51048947f","cross_cats_sorted":["cs.CR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-09-15T18:23:15Z","title_canon_sha256":"a09e78a3a2ef8a5fab2a70036859676f864306a461db0000bce1da67e982e0f4"},"schema_version":"1.0","source":{"id":"2109.07517","kind":"arxiv","version":2}},"canonical_sha256":"84af64ac2169c169de1f70bafa66f928b5c064ff68090d968ec5ad54bf3f9c30","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"84af64ac2169c169de1f70bafa66f928b5c064ff68090d968ec5ad54bf3f9c30","first_computed_at":"2026-07-05T03:45:11.850722Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:45:11.850722Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"s8GUeU26w47+w8Mb8FrBQH8fC/g8riPPdGyki60/qJqedgJ7uPLVCleGNbLlhbtYWSRwLflKQPgGlSbkqLCNDA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:45:11.851221Z","signed_message":"canonical_sha256_bytes"},"source_id":"2109.07517","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b7e9fca919245076f2c28354ab0bdb81e270d20634a2b83744ca2209f8a4f8e6","sha256:cc15ca7987ec3c373cd3d4b79c30c8ccfb8c33a37666226e26fe0fde5c456366"],"state_sha256":"4c8769d86f7e689b0bb19bc45a2cd5dda3c9a71d47faed37677be714815b7c4e"}