{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:BGCDWMG6WOUDQRANTU7INPQDDR","short_pith_number":"pith:BGCDWMG6","canonical_record":{"source":{"id":"2006.00666","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-06-01T01:50:18Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"aa231567d12b7a4ff2bb5a9abdee7901ddb4074f4ab12d7402e43a48f029a73a","abstract_canon_sha256":"aae15d58105fcbc22c120b15e1556dd01951071c18361c4dcbb72c97a1e613a0"},"schema_version":"1.0"},"canonical_sha256":"09843b30deb3a838440d9d3e86be031c7ab23f54c2699642725d5656f8ac7379","source":{"kind":"arxiv","id":"2006.00666","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2006.00666","created_at":"2026-07-05T01:26:16Z"},{"alias_kind":"arxiv_version","alias_value":"2006.00666v1","created_at":"2026-07-05T01:26:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2006.00666","created_at":"2026-07-05T01:26:16Z"},{"alias_kind":"pith_short_12","alias_value":"BGCDWMG6WOUD","created_at":"2026-07-05T01:26:16Z"},{"alias_kind":"pith_short_16","alias_value":"BGCDWMG6WOUDQRAN","created_at":"2026-07-05T01:26:16Z"},{"alias_kind":"pith_short_8","alias_value":"BGCDWMG6","created_at":"2026-07-05T01:26:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:BGCDWMG6WOUDQRANTU7INPQDDR","target":"record","payload":{"canonical_record":{"source":{"id":"2006.00666","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-06-01T01:50:18Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"aa231567d12b7a4ff2bb5a9abdee7901ddb4074f4ab12d7402e43a48f029a73a","abstract_canon_sha256":"aae15d58105fcbc22c120b15e1556dd01951071c18361c4dcbb72c97a1e613a0"},"schema_version":"1.0"},"canonical_sha256":"09843b30deb3a838440d9d3e86be031c7ab23f54c2699642725d5656f8ac7379","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:26:16.586432Z","signature_b64":"FaQpCdRsU51eTXzPIJQuIbeuIQZH8it5pSOobY4yoO59tZiaYhfylKT+jQ5nCE/GmYWn1wcGg6S2dZiHWpiWCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"09843b30deb3a838440d9d3e86be031c7ab23f54c2699642725d5656f8ac7379","last_reissued_at":"2026-07-05T01:26:16.585894Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:26:16.585894Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2006.00666","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":"2026-07-05T01:26:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bbuql1CklhfFrwTAaC0ACy3oFCDQfVGXg1zz8wUhErH/FkcjGtiJSKXJXL6r7XrDMoao1lt3b8qMb03CcYEUCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-17T06:14:52.238740Z"},"content_sha256":"070e42839e9a0b65d4bba39dd7afc85758156b6ca09db9f1bb2388c2e6f676cb","schema_version":"1.0","event_id":"sha256:070e42839e9a0b65d4bba39dd7afc85758156b6ca09db9f1bb2388c2e6f676cb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:BGCDWMG6WOUDQRANTU7INPQDDR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Towards satellite-based quantum-secure time transfer","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"quant-ph","authors_text":"Chao-Ze Wang, Cheng-Zhi Peng, Feihu Xu, Hui Dai, Jian-Wei Pan, Ji-Gang Ren, Juan Yin, Qiang Zhang, Qi Shen, Sheng-Kai Liao, Shuang-Lin Li, Wei-Yue Liu, Wen-Qi Cai, Yu-Ao Chen","submitted_at":"2020-06-01T01:50:18Z","abstract_excerpt":"High-precision time synchronization for remote clocks plays an important role in fundamental science and real-life applications. However, the current time synchronization techniques have been shown to be vulnerable to sophisticated adversaries. There is a compelling need for fundamentally new methods to distribute high-precision time information securely. Here we propose a satellite-based quantum-secure time transfer (QSTT) scheme based on two-way quantum key distribution (QKD) in free-space, and experimentally verify the key technologies of the scheme via the Micius quantum satellite. In QSTT"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.00666","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/2006.00666/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":"2026-07-05T01:26:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6XDyRPqs5Nb81VK6v+KEpelj0nrek4c2n2Xbm0OG0UNrHRZhki5q6ZS7NOS+eWKI631D3RVqXmlXugEmMT0JDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-17T06:14:52.239101Z"},"content_sha256":"128f2a477d9ad12685bc0b96e9bb8bc63c48f7d323ee38461b3200fde1f8201e","schema_version":"1.0","event_id":"sha256:128f2a477d9ad12685bc0b96e9bb8bc63c48f7d323ee38461b3200fde1f8201e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BGCDWMG6WOUDQRANTU7INPQDDR/bundle.json","state_url":"https://pith.science/pith/BGCDWMG6WOUDQRANTU7INPQDDR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BGCDWMG6WOUDQRANTU7INPQDDR/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":"2026-07-17T06:14:52Z","links":{"resolver":"https://pith.science/pith/BGCDWMG6WOUDQRANTU7INPQDDR","bundle":"https://pith.science/pith/BGCDWMG6WOUDQRANTU7INPQDDR/bundle.json","state":"https://pith.science/pith/BGCDWMG6WOUDQRANTU7INPQDDR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BGCDWMG6WOUDQRANTU7INPQDDR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:BGCDWMG6WOUDQRANTU7INPQDDR","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":"aae15d58105fcbc22c120b15e1556dd01951071c18361c4dcbb72c97a1e613a0","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-06-01T01:50:18Z","title_canon_sha256":"aa231567d12b7a4ff2bb5a9abdee7901ddb4074f4ab12d7402e43a48f029a73a"},"schema_version":"1.0","source":{"id":"2006.00666","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2006.00666","created_at":"2026-07-05T01:26:16Z"},{"alias_kind":"arxiv_version","alias_value":"2006.00666v1","created_at":"2026-07-05T01:26:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2006.00666","created_at":"2026-07-05T01:26:16Z"},{"alias_kind":"pith_short_12","alias_value":"BGCDWMG6WOUD","created_at":"2026-07-05T01:26:16Z"},{"alias_kind":"pith_short_16","alias_value":"BGCDWMG6WOUDQRAN","created_at":"2026-07-05T01:26:16Z"},{"alias_kind":"pith_short_8","alias_value":"BGCDWMG6","created_at":"2026-07-05T01:26:16Z"}],"graph_snapshots":[{"event_id":"sha256:128f2a477d9ad12685bc0b96e9bb8bc63c48f7d323ee38461b3200fde1f8201e","target":"graph","created_at":"2026-07-05T01:26:16Z","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/2006.00666/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"High-precision time synchronization for remote clocks plays an important role in fundamental science and real-life applications. However, the current time synchronization techniques have been shown to be vulnerable to sophisticated adversaries. There is a compelling need for fundamentally new methods to distribute high-precision time information securely. Here we propose a satellite-based quantum-secure time transfer (QSTT) scheme based on two-way quantum key distribution (QKD) in free-space, and experimentally verify the key technologies of the scheme via the Micius quantum satellite. In QSTT","authors_text":"Chao-Ze Wang, Cheng-Zhi Peng, Feihu Xu, Hui Dai, Jian-Wei Pan, Ji-Gang Ren, Juan Yin, Qiang Zhang, Qi Shen, Sheng-Kai Liao, Shuang-Lin Li, Wei-Yue Liu, Wen-Qi Cai, Yu-Ao Chen","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-06-01T01:50:18Z","title":"Towards satellite-based quantum-secure time transfer"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.00666","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":"sha256:070e42839e9a0b65d4bba39dd7afc85758156b6ca09db9f1bb2388c2e6f676cb","target":"record","created_at":"2026-07-05T01:26:16Z","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":"aae15d58105fcbc22c120b15e1556dd01951071c18361c4dcbb72c97a1e613a0","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-06-01T01:50:18Z","title_canon_sha256":"aa231567d12b7a4ff2bb5a9abdee7901ddb4074f4ab12d7402e43a48f029a73a"},"schema_version":"1.0","source":{"id":"2006.00666","kind":"arxiv","version":1}},"canonical_sha256":"09843b30deb3a838440d9d3e86be031c7ab23f54c2699642725d5656f8ac7379","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"09843b30deb3a838440d9d3e86be031c7ab23f54c2699642725d5656f8ac7379","first_computed_at":"2026-07-05T01:26:16.585894Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:26:16.585894Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FaQpCdRsU51eTXzPIJQuIbeuIQZH8it5pSOobY4yoO59tZiaYhfylKT+jQ5nCE/GmYWn1wcGg6S2dZiHWpiWCA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:26:16.586432Z","signed_message":"canonical_sha256_bytes"},"source_id":"2006.00666","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:070e42839e9a0b65d4bba39dd7afc85758156b6ca09db9f1bb2388c2e6f676cb","sha256:128f2a477d9ad12685bc0b96e9bb8bc63c48f7d323ee38461b3200fde1f8201e"],"state_sha256":"c3f237b2db3ffc78e68f107fdceac0acd82bfc3a243edc04577760155b04cfea"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BPAgllVBXL6NoQkgneFvI0oIcwvpxi1S9jcLaZ99At95vQy8MrIMcyCNOwb0W6K02KGQpqRG4t5s3OVlfM1gCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-17T06:14:52.241564Z","bundle_sha256":"7acecd672a8ce7f4bf6763db1245ef3a967ad1ef41a7bc84d183442eeafc75a3"}}