{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:SJK2FAJK6NBGUE7ZVQGG3BUQUV","short_pith_number":"pith:SJK2FAJK","canonical_record":{"source":{"id":"1309.7973","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-09-30T19:20:16Z","cross_cats_sorted":[],"title_canon_sha256":"cff87fd08ec6b6db25a01c8de5ed12846ac4622be2da4a3e94f63c3bdc813a3e","abstract_canon_sha256":"3b69c566a8282d3ce44fdbe83c18ef46a35688c87bd8f0933b7f9b52f269dce3"},"schema_version":"1.0"},"canonical_sha256":"9255a2812af3426a13f9ac0c6d8690a55e1702b5cc06c206bb2cecd72c09f409","source":{"kind":"arxiv","id":"1309.7973","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.7973","created_at":"2026-05-18T03:01:58Z"},{"alias_kind":"arxiv_version","alias_value":"1309.7973v1","created_at":"2026-05-18T03:01:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.7973","created_at":"2026-05-18T03:01:58Z"},{"alias_kind":"pith_short_12","alias_value":"SJK2FAJK6NBG","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"SJK2FAJK6NBGUE7Z","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"SJK2FAJK","created_at":"2026-05-18T12:27:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:SJK2FAJK6NBGUE7ZVQGG3BUQUV","target":"record","payload":{"canonical_record":{"source":{"id":"1309.7973","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-09-30T19:20:16Z","cross_cats_sorted":[],"title_canon_sha256":"cff87fd08ec6b6db25a01c8de5ed12846ac4622be2da4a3e94f63c3bdc813a3e","abstract_canon_sha256":"3b69c566a8282d3ce44fdbe83c18ef46a35688c87bd8f0933b7f9b52f269dce3"},"schema_version":"1.0"},"canonical_sha256":"9255a2812af3426a13f9ac0c6d8690a55e1702b5cc06c206bb2cecd72c09f409","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:01:58.134968Z","signature_b64":"7D04k5Cy4tcfN53ei18R4+MM54da21VGk+9AmkKUG75LuSFsbAjJO9Wm/XhTDU1E0Rdtu5ePeeAyTdhpB6u6DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9255a2812af3426a13f9ac0c6d8690a55e1702b5cc06c206bb2cecd72c09f409","last_reissued_at":"2026-05-18T03:01:58.134291Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:01:58.134291Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1309.7973","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":"2026-05-18T03:01:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Qadg5FEILAR7IMLQBat9NWybZB57CHaiOe1K81+bBEvtnhHpJzY86pHI+0KWhzI+0m9h2Klo+l1jVN762MgQDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T09:48:46.715879Z"},"content_sha256":"b2fa8dc2185dd23963f64d0c946de3ea54587db917b3cea9841d5715aae39c04","schema_version":"1.0","event_id":"sha256:b2fa8dc2185dd23963f64d0c946de3ea54587db917b3cea9841d5715aae39c04"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:SJK2FAJK6NBGUE7ZVQGG3BUQUV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Two-way quantum cryptography at different wavelengths","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Carlo Ottaviani, Christian Weedbrook, Stefano Pirandola","submitted_at":"2013-09-30T19:20:16Z","abstract_excerpt":"We study the security of two-way quantum cryptography at different wavelengths of the electromagnetic spectrum, from the optical range down to the microwave range. In particular, we consider a two-way quantum communication protocol where Gaussian-modulated thermal states are subject to random Gaussian displacements and finally homodyned. We show how its security threshold (in reverse reconciliation) is extremely robust with respect to the preparation noise and able to outperform the security thresholds of one-way protocols at any wavelength. As a result, improved security distances are now acc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.7973","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":""},"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":"2026-05-18T03:01:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uJo9ZYRNjcZg8M+X8OCIDKqCtthtRJagtLbkzvuQ3wsHvE2LhReXv1KdoDteBDpKQMHPGhDhNe+1Y3vELgdWDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T09:48:46.716238Z"},"content_sha256":"99750a30bdbbf44bcd92b0331de4fc4fd17bb2436e5131274ca664890426b160","schema_version":"1.0","event_id":"sha256:99750a30bdbbf44bcd92b0331de4fc4fd17bb2436e5131274ca664890426b160"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SJK2FAJK6NBGUE7ZVQGG3BUQUV/bundle.json","state_url":"https://pith.science/pith/SJK2FAJK6NBGUE7ZVQGG3BUQUV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SJK2FAJK6NBGUE7ZVQGG3BUQUV/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":"2026-06-05T09:48:46Z","links":{"resolver":"https://pith.science/pith/SJK2FAJK6NBGUE7ZVQGG3BUQUV","bundle":"https://pith.science/pith/SJK2FAJK6NBGUE7ZVQGG3BUQUV/bundle.json","state":"https://pith.science/pith/SJK2FAJK6NBGUE7ZVQGG3BUQUV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SJK2FAJK6NBGUE7ZVQGG3BUQUV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:SJK2FAJK6NBGUE7ZVQGG3BUQUV","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":"3b69c566a8282d3ce44fdbe83c18ef46a35688c87bd8f0933b7f9b52f269dce3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-09-30T19:20:16Z","title_canon_sha256":"cff87fd08ec6b6db25a01c8de5ed12846ac4622be2da4a3e94f63c3bdc813a3e"},"schema_version":"1.0","source":{"id":"1309.7973","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.7973","created_at":"2026-05-18T03:01:58Z"},{"alias_kind":"arxiv_version","alias_value":"1309.7973v1","created_at":"2026-05-18T03:01:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.7973","created_at":"2026-05-18T03:01:58Z"},{"alias_kind":"pith_short_12","alias_value":"SJK2FAJK6NBG","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"SJK2FAJK6NBGUE7Z","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"SJK2FAJK","created_at":"2026-05-18T12:27:59Z"}],"graph_snapshots":[{"event_id":"sha256:99750a30bdbbf44bcd92b0331de4fc4fd17bb2436e5131274ca664890426b160","target":"graph","created_at":"2026-05-18T03:01:58Z","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":"We study the security of two-way quantum cryptography at different wavelengths of the electromagnetic spectrum, from the optical range down to the microwave range. In particular, we consider a two-way quantum communication protocol where Gaussian-modulated thermal states are subject to random Gaussian displacements and finally homodyned. We show how its security threshold (in reverse reconciliation) is extremely robust with respect to the preparation noise and able to outperform the security thresholds of one-way protocols at any wavelength. As a result, improved security distances are now acc","authors_text":"Carlo Ottaviani, Christian Weedbrook, Stefano Pirandola","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-09-30T19:20:16Z","title":"Two-way quantum cryptography at different wavelengths"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.7973","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:b2fa8dc2185dd23963f64d0c946de3ea54587db917b3cea9841d5715aae39c04","target":"record","created_at":"2026-05-18T03:01:58Z","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":"3b69c566a8282d3ce44fdbe83c18ef46a35688c87bd8f0933b7f9b52f269dce3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-09-30T19:20:16Z","title_canon_sha256":"cff87fd08ec6b6db25a01c8de5ed12846ac4622be2da4a3e94f63c3bdc813a3e"},"schema_version":"1.0","source":{"id":"1309.7973","kind":"arxiv","version":1}},"canonical_sha256":"9255a2812af3426a13f9ac0c6d8690a55e1702b5cc06c206bb2cecd72c09f409","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9255a2812af3426a13f9ac0c6d8690a55e1702b5cc06c206bb2cecd72c09f409","first_computed_at":"2026-05-18T03:01:58.134291Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:01:58.134291Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7D04k5Cy4tcfN53ei18R4+MM54da21VGk+9AmkKUG75LuSFsbAjJO9Wm/XhTDU1E0Rdtu5ePeeAyTdhpB6u6DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:01:58.134968Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.7973","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b2fa8dc2185dd23963f64d0c946de3ea54587db917b3cea9841d5715aae39c04","sha256:99750a30bdbbf44bcd92b0331de4fc4fd17bb2436e5131274ca664890426b160"],"state_sha256":"8c339956e470b366a80a977ccb2ac9d41bff19954ec3410ed3cdbb1dc70cc489"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7HSrspGMInll4ReoFpX/mvCuoxicRqRlypFkXchuyVWzjtpu0sTyDwuxDc2uaFNIlVDQydfKe/oIfFEZmcKUDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T09:48:46.718613Z","bundle_sha256":"55e5165db917c0260c461e483e57368cce71be3971eb61188a66e1f6e5ea63be"}}