{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:EKLYYYOOMZ5HP4Y6TL5HN5K5ZR","short_pith_number":"pith:EKLYYYOO","canonical_record":{"source":{"id":"1109.5168","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-09-23T19:51:48Z","cross_cats_sorted":[],"title_canon_sha256":"b11fd4ae9bcfc8cd42640da02fb9b5e56196e6d3b4c28c28a55708bedcd0ef38","abstract_canon_sha256":"30ed7bf50ca67f13cd4816666b97b7d9e214d1160620c086b2cfda635fd2d902"},"schema_version":"1.0"},"canonical_sha256":"22978c61ce667a77f31e9afa76f55dcc587a8b2c2151a1797f686872986f4d81","source":{"kind":"arxiv","id":"1109.5168","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.5168","created_at":"2026-05-18T04:12:21Z"},{"alias_kind":"arxiv_version","alias_value":"1109.5168v1","created_at":"2026-05-18T04:12:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.5168","created_at":"2026-05-18T04:12:21Z"},{"alias_kind":"pith_short_12","alias_value":"EKLYYYOOMZ5H","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"EKLYYYOOMZ5HP4Y6","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"EKLYYYOO","created_at":"2026-05-18T12:26:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:EKLYYYOOMZ5HP4Y6TL5HN5K5ZR","target":"record","payload":{"canonical_record":{"source":{"id":"1109.5168","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-09-23T19:51:48Z","cross_cats_sorted":[],"title_canon_sha256":"b11fd4ae9bcfc8cd42640da02fb9b5e56196e6d3b4c28c28a55708bedcd0ef38","abstract_canon_sha256":"30ed7bf50ca67f13cd4816666b97b7d9e214d1160620c086b2cfda635fd2d902"},"schema_version":"1.0"},"canonical_sha256":"22978c61ce667a77f31e9afa76f55dcc587a8b2c2151a1797f686872986f4d81","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:12:21.568405Z","signature_b64":"FrTi4rOZJPNkHxX9bsK0tRBuBSLZMSccVuo9CIYLQlN+mEgaSpAADoWeHIrqugo+tRoZH7PWCIHrqZc53WfNCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"22978c61ce667a77f31e9afa76f55dcc587a8b2c2151a1797f686872986f4d81","last_reissued_at":"2026-05-18T04:12:21.567936Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:12:21.567936Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1109.5168","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":"2026-05-18T04:12:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x6zwGwrSgB4oxEc/mj1PnaG2p4fepsULZfrjaH99PimxUcFE6yENTYoLAgbgMP/kj24v7vN+GIjkiaKlD1nbDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T20:07:59.800120Z"},"content_sha256":"030d81b95d5eb7dba6ea99f8f0924556b945dbd499198fd171450368b81c9e51","schema_version":"1.0","event_id":"sha256:030d81b95d5eb7dba6ea99f8f0924556b945dbd499198fd171450368b81c9e51"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:EKLYYYOOMZ5HP4Y6TL5HN5K5ZR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Security of Authentication with a Fixed Key in Quantum Key Distribution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Aysajan Abidin, Jan-{\\AA}ke Larsson","submitted_at":"2011-09-23T19:51:48Z","abstract_excerpt":"We study the security of a specific authentication procedure of interest in the context of Quantum Key Distribution (QKD). It works as follows: use a secret but fixed Strongly Universal$_2$ (SU$_2$) hash function and encrypt the output tag with a one-time pad (OTP). If the OTP is completely secret, the expected time for an adversary to create a tag for a chosen message is exponential in the tag length. If, however, the OTP is partially known in each authentication round, as is the case in practical QKD protocols, then the picture is different; the adversary's partial knowledge of the OTP in ea"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.5168","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":"2026-05-18T04:12:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q1oLdQhu2wBP/exmkDwNzRQfJXeIJ9z+awL1OM695pAeXL9a+BOvn/F344O/nCitWqypai44Ph9x76Y4ONdJBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T20:07:59.800924Z"},"content_sha256":"81d15ff2576e362e36292c4cf96ef6757e4bdda9ceec5c9eb44575674a648535","schema_version":"1.0","event_id":"sha256:81d15ff2576e362e36292c4cf96ef6757e4bdda9ceec5c9eb44575674a648535"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EKLYYYOOMZ5HP4Y6TL5HN5K5ZR/bundle.json","state_url":"https://pith.science/pith/EKLYYYOOMZ5HP4Y6TL5HN5K5ZR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EKLYYYOOMZ5HP4Y6TL5HN5K5ZR/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":"2026-06-08T20:07:59Z","links":{"resolver":"https://pith.science/pith/EKLYYYOOMZ5HP4Y6TL5HN5K5ZR","bundle":"https://pith.science/pith/EKLYYYOOMZ5HP4Y6TL5HN5K5ZR/bundle.json","state":"https://pith.science/pith/EKLYYYOOMZ5HP4Y6TL5HN5K5ZR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EKLYYYOOMZ5HP4Y6TL5HN5K5ZR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:EKLYYYOOMZ5HP4Y6TL5HN5K5ZR","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":"30ed7bf50ca67f13cd4816666b97b7d9e214d1160620c086b2cfda635fd2d902","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-09-23T19:51:48Z","title_canon_sha256":"b11fd4ae9bcfc8cd42640da02fb9b5e56196e6d3b4c28c28a55708bedcd0ef38"},"schema_version":"1.0","source":{"id":"1109.5168","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.5168","created_at":"2026-05-18T04:12:21Z"},{"alias_kind":"arxiv_version","alias_value":"1109.5168v1","created_at":"2026-05-18T04:12:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.5168","created_at":"2026-05-18T04:12:21Z"},{"alias_kind":"pith_short_12","alias_value":"EKLYYYOOMZ5H","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"EKLYYYOOMZ5HP4Y6","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"EKLYYYOO","created_at":"2026-05-18T12:26:28Z"}],"graph_snapshots":[{"event_id":"sha256:81d15ff2576e362e36292c4cf96ef6757e4bdda9ceec5c9eb44575674a648535","target":"graph","created_at":"2026-05-18T04:12:21Z","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 a specific authentication procedure of interest in the context of Quantum Key Distribution (QKD). It works as follows: use a secret but fixed Strongly Universal$_2$ (SU$_2$) hash function and encrypt the output tag with a one-time pad (OTP). If the OTP is completely secret, the expected time for an adversary to create a tag for a chosen message is exponential in the tag length. If, however, the OTP is partially known in each authentication round, as is the case in practical QKD protocols, then the picture is different; the adversary's partial knowledge of the OTP in ea","authors_text":"Aysajan Abidin, Jan-{\\AA}ke Larsson","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-09-23T19:51:48Z","title":"Security of Authentication with a Fixed Key in Quantum Key Distribution"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.5168","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":"sha256:030d81b95d5eb7dba6ea99f8f0924556b945dbd499198fd171450368b81c9e51","target":"record","created_at":"2026-05-18T04:12:21Z","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":"30ed7bf50ca67f13cd4816666b97b7d9e214d1160620c086b2cfda635fd2d902","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-09-23T19:51:48Z","title_canon_sha256":"b11fd4ae9bcfc8cd42640da02fb9b5e56196e6d3b4c28c28a55708bedcd0ef38"},"schema_version":"1.0","source":{"id":"1109.5168","kind":"arxiv","version":1}},"canonical_sha256":"22978c61ce667a77f31e9afa76f55dcc587a8b2c2151a1797f686872986f4d81","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"22978c61ce667a77f31e9afa76f55dcc587a8b2c2151a1797f686872986f4d81","first_computed_at":"2026-05-18T04:12:21.567936Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:12:21.567936Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FrTi4rOZJPNkHxX9bsK0tRBuBSLZMSccVuo9CIYLQlN+mEgaSpAADoWeHIrqugo+tRoZH7PWCIHrqZc53WfNCg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:12:21.568405Z","signed_message":"canonical_sha256_bytes"},"source_id":"1109.5168","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:030d81b95d5eb7dba6ea99f8f0924556b945dbd499198fd171450368b81c9e51","sha256:81d15ff2576e362e36292c4cf96ef6757e4bdda9ceec5c9eb44575674a648535"],"state_sha256":"c89bf790b0675f74b36e6c2e799b839b176a3e0e45b39de4a880d331f2ab956a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3gD00Xw3KrD7mvIbQH6bPEIFoKTyoC6dTHpizjHB4+JgaYcuzkZ0SWoP2W8QHtatEc8J+VQY7pjQK+YV+3wiDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T20:07:59.804996Z","bundle_sha256":"629d564e2a380c019ef743226fff09f410a563591dc9100015c94a33325949da"}}