{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:COHDATKBQD2IBAGWPMMX3KZVBU","short_pith_number":"pith:COHDATKB","canonical_record":{"source":{"id":"1903.00696","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-03-02T12:54:24Z","cross_cats_sorted":[],"title_canon_sha256":"ba18822875a4a8d6fbffa4ea50e78255299ffebf69a23e9ba14ebde442dc88c0","abstract_canon_sha256":"8922e5d1c72e14d0451641980c63df30ff94330953708d113165dc320d2f9a49"},"schema_version":"1.0"},"canonical_sha256":"138e304d4180f48080d67b197dab350d16d9bbfdd4c3b786bc26a92c7ed8f21b","source":{"kind":"arxiv","id":"1903.00696","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.00696","created_at":"2026-05-17T23:46:52Z"},{"alias_kind":"arxiv_version","alias_value":"1903.00696v1","created_at":"2026-05-17T23:46:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.00696","created_at":"2026-05-17T23:46:52Z"},{"alias_kind":"pith_short_12","alias_value":"COHDATKBQD2I","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"COHDATKBQD2IBAGW","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"COHDATKB","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:COHDATKBQD2IBAGWPMMX3KZVBU","target":"record","payload":{"canonical_record":{"source":{"id":"1903.00696","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-03-02T12:54:24Z","cross_cats_sorted":[],"title_canon_sha256":"ba18822875a4a8d6fbffa4ea50e78255299ffebf69a23e9ba14ebde442dc88c0","abstract_canon_sha256":"8922e5d1c72e14d0451641980c63df30ff94330953708d113165dc320d2f9a49"},"schema_version":"1.0"},"canonical_sha256":"138e304d4180f48080d67b197dab350d16d9bbfdd4c3b786bc26a92c7ed8f21b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:46:52.809311Z","signature_b64":"B1kDvdJOa+wwyL24vrX27HqmzQbVfuWPYzDcVsSs2X8br7ej2xRFJL1rhirXZw/Ns44qJK4ziVjXskmzRS6QCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"138e304d4180f48080d67b197dab350d16d9bbfdd4c3b786bc26a92c7ed8f21b","last_reissued_at":"2026-05-17T23:46:52.808685Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:46:52.808685Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.00696","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":"2026-05-17T23:46:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"726pfYEc2rkgXRhmR9xsr+uLAieaBAr8e4uoyZtAlNrlhJkCI+iAoFycB/Fpp/krSGNoM8KjrKiFnU+VA7vDBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T23:06:28.850634Z"},"content_sha256":"a42f25959863d676b1add686c0f292b1e97e88e2d70c069fae2ac7ceae0cbfc7","schema_version":"1.0","event_id":"sha256:a42f25959863d676b1add686c0f292b1e97e88e2d70c069fae2ac7ceae0cbfc7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:COHDATKBQD2IBAGWPMMX3KZVBU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"All-fiber self-compensating polarization encoder for Quantum Key Distribution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Andrea Stanco, Costantino Agnesi, Giuseppe Vallone, Marco Avesani, Paolo Villoresi","submitted_at":"2019-03-02T12:54:24Z","abstract_excerpt":"Quantum Key Distribution (QKD) allows distant parties to exchange cryptographic keys with unconditional security by encoding information on the degrees of freedom of photons. Polarization encoding has been extensively used in QKD implementations along free-space, optical fiber and satellite-based links. However, the polarization encoders used in such implementations are unstable, expensive, complex and can even exhibit side-channels that undermine the security of the implemented protocol. Here we propose a self-compensating polarization encoder based on a Lithium Niobate phase modulator inside"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.00696","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":"2026-05-17T23:46:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JlDXpe3n0tZCDLt9cUlm1lIo6Gb6EMog8BDj1lCDxH8KXtotMnnJ/3TEZvH4V225H5LLtVv+SUIpRZ2PgW4RDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T23:06:28.851274Z"},"content_sha256":"c2cae13696881cfab33d723946586773ba0f7bac0df014f063434a29c3a42776","schema_version":"1.0","event_id":"sha256:c2cae13696881cfab33d723946586773ba0f7bac0df014f063434a29c3a42776"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/COHDATKBQD2IBAGWPMMX3KZVBU/bundle.json","state_url":"https://pith.science/pith/COHDATKBQD2IBAGWPMMX3KZVBU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/COHDATKBQD2IBAGWPMMX3KZVBU/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":"2026-05-28T23:06:28Z","links":{"resolver":"https://pith.science/pith/COHDATKBQD2IBAGWPMMX3KZVBU","bundle":"https://pith.science/pith/COHDATKBQD2IBAGWPMMX3KZVBU/bundle.json","state":"https://pith.science/pith/COHDATKBQD2IBAGWPMMX3KZVBU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/COHDATKBQD2IBAGWPMMX3KZVBU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:COHDATKBQD2IBAGWPMMX3KZVBU","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":"8922e5d1c72e14d0451641980c63df30ff94330953708d113165dc320d2f9a49","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-03-02T12:54:24Z","title_canon_sha256":"ba18822875a4a8d6fbffa4ea50e78255299ffebf69a23e9ba14ebde442dc88c0"},"schema_version":"1.0","source":{"id":"1903.00696","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.00696","created_at":"2026-05-17T23:46:52Z"},{"alias_kind":"arxiv_version","alias_value":"1903.00696v1","created_at":"2026-05-17T23:46:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.00696","created_at":"2026-05-17T23:46:52Z"},{"alias_kind":"pith_short_12","alias_value":"COHDATKBQD2I","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"COHDATKBQD2IBAGW","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"COHDATKB","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:c2cae13696881cfab33d723946586773ba0f7bac0df014f063434a29c3a42776","target":"graph","created_at":"2026-05-17T23:46:52Z","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 Key Distribution (QKD) allows distant parties to exchange cryptographic keys with unconditional security by encoding information on the degrees of freedom of photons. Polarization encoding has been extensively used in QKD implementations along free-space, optical fiber and satellite-based links. However, the polarization encoders used in such implementations are unstable, expensive, complex and can even exhibit side-channels that undermine the security of the implemented protocol. Here we propose a self-compensating polarization encoder based on a Lithium Niobate phase modulator inside","authors_text":"Andrea Stanco, Costantino Agnesi, Giuseppe Vallone, Marco Avesani, Paolo Villoresi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-03-02T12:54:24Z","title":"All-fiber self-compensating polarization encoder for Quantum Key Distribution"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.00696","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:a42f25959863d676b1add686c0f292b1e97e88e2d70c069fae2ac7ceae0cbfc7","target":"record","created_at":"2026-05-17T23:46:52Z","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":"8922e5d1c72e14d0451641980c63df30ff94330953708d113165dc320d2f9a49","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-03-02T12:54:24Z","title_canon_sha256":"ba18822875a4a8d6fbffa4ea50e78255299ffebf69a23e9ba14ebde442dc88c0"},"schema_version":"1.0","source":{"id":"1903.00696","kind":"arxiv","version":1}},"canonical_sha256":"138e304d4180f48080d67b197dab350d16d9bbfdd4c3b786bc26a92c7ed8f21b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"138e304d4180f48080d67b197dab350d16d9bbfdd4c3b786bc26a92c7ed8f21b","first_computed_at":"2026-05-17T23:46:52.808685Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:46:52.808685Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"B1kDvdJOa+wwyL24vrX27HqmzQbVfuWPYzDcVsSs2X8br7ej2xRFJL1rhirXZw/Ns44qJK4ziVjXskmzRS6QCQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:46:52.809311Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.00696","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a42f25959863d676b1add686c0f292b1e97e88e2d70c069fae2ac7ceae0cbfc7","sha256:c2cae13696881cfab33d723946586773ba0f7bac0df014f063434a29c3a42776"],"state_sha256":"2cd7dcde89915f5129248a5c14c51724a134c4489c1c04a30332bc9bc1e83923"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7Puf1rIsQDAATz3oNP72mN1MFfOTOc3sCS7pR1YLx7AOHqqLJJKm+2zLwb/+gAnMQRg6I0AoVCqWlp/Nmk7JDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T23:06:28.854713Z","bundle_sha256":"91a2128f6ad74cb7f6ff05d32b388c905eb9822cb8847625a1c8735e42cc9444"}}