{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:GTPGYARU3M7TTPFVXUNFZQTZUN","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":"a58910c9ea9d7ad716dc72db16b3a368538f699203ee930d8ebab3de15aa33fe","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-03-03T03:10:02Z","title_canon_sha256":"a82cc0741aa08cf1e79d8d3634fc33b783ebe745ab30eed0aefba8e05545a7cf"},"schema_version":"1.0","source":{"id":"1703.01021","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.01021","created_at":"2026-05-18T00:45:11Z"},{"alias_kind":"arxiv_version","alias_value":"1703.01021v2","created_at":"2026-05-18T00:45:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.01021","created_at":"2026-05-18T00:45:11Z"},{"alias_kind":"pith_short_12","alias_value":"GTPGYARU3M7T","created_at":"2026-05-18T12:31:18Z"},{"alias_kind":"pith_short_16","alias_value":"GTPGYARU3M7TTPFV","created_at":"2026-05-18T12:31:18Z"},{"alias_kind":"pith_short_8","alias_value":"GTPGYARU","created_at":"2026-05-18T12:31:18Z"}],"graph_snapshots":[{"event_id":"sha256:2a143896478e8b192bbd5e65035fe0498982652d250b06ed5e48eba15d4f9163","target":"graph","created_at":"2026-05-18T00:45:11Z","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"},"paper":{"abstract_excerpt":"Quantum digital signatures (QDS) provide a means for signing electronic communications with informationtheoretic security. However, all previous demonstrations of quantum digital signatures assume trusted measurement devices. This renders them vulnerable against detector side-channel attacks, just like quantum key distribution. Here, we exploit a measurement-device-independent (MDI) quantum network, over a 200-square-kilometer metropolitan area, to perform a field test of a three-party measurement-device-independent quantum digital signature (MDI-QDS) scheme that is secure against any detector","authors_text":"Erika Andersson, Hao Li, Hua-Lei Yin, Hui Liu, Ittoop Vergheese Puthoor, Jian-Wei Pan, Li-Xing You, Marcos Curty, Qiang Zhang, Qi Zhao, Teng-Yun Chen, Wei-Jun Zhang, Wei-Long Wang, Xiang-Xiang Sun, Xiao Jiang, Xiongfeng Ma, Yang Liu, Yan-Lin Tang, Zhen Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-03-03T03:10:02Z","title":"Experimental measurement-device-independent quantum digital signatures over a metropolitan network"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.01021","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":"sha256:7a5b21a30c91782d2c61b38772b6f60dbd3284f2062852cd81d457cfa1df1e65","target":"record","created_at":"2026-05-18T00:45:11Z","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":"a58910c9ea9d7ad716dc72db16b3a368538f699203ee930d8ebab3de15aa33fe","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-03-03T03:10:02Z","title_canon_sha256":"a82cc0741aa08cf1e79d8d3634fc33b783ebe745ab30eed0aefba8e05545a7cf"},"schema_version":"1.0","source":{"id":"1703.01021","kind":"arxiv","version":2}},"canonical_sha256":"34de6c0234db3f39bcb5bd1a5cc279a358b555c2f9d921fb4cdbac80c3db02a7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"34de6c0234db3f39bcb5bd1a5cc279a358b555c2f9d921fb4cdbac80c3db02a7","first_computed_at":"2026-05-18T00:45:11.484648Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:45:11.484648Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WJA/say+UozabswavfQ0K6aeW/nhdlPT0rWWUsNjEc5pX1eS6a571Ons3CHx+Ywr0/y+07pknCJcQzlRSGfDAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:45:11.485284Z","signed_message":"canonical_sha256_bytes"},"source_id":"1703.01021","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7a5b21a30c91782d2c61b38772b6f60dbd3284f2062852cd81d457cfa1df1e65","sha256:2a143896478e8b192bbd5e65035fe0498982652d250b06ed5e48eba15d4f9163"],"state_sha256":"0d825339ef448b4aee87332a045fec280ef749e581ae654266a22fa75d017034"}