{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:FJZ7KLOXATMN2PQHZCFPXFVFDA","short_pith_number":"pith:FJZ7KLOX","schema_version":"1.0","canonical_sha256":"2a73f52dd704d8dd3e07c88afb96a51816a818fb61a1fc3950c979785e5905e2","source":{"kind":"arxiv","id":"2606.01949","version":1},"attestation_state":"computed","paper":{"title":"Quantum secure blind decryption with two users","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Masahito Hayashi, Yuki Ito","submitted_at":"2026-06-01T09:10:00Z","abstract_excerpt":"We propose two types of protocols for quantum secure blind decryption, involving two users and servers. User 1 holds the encrypted ciphertext. The servers store several indexed keys including the key encrypting the ciphertext. User 2 aims to obtain the decrypted text. The protocols are designed to preserve the following types of secrecy: Users ensure the secrecy of the text from the servers. Servers maintain the secrecy of the keys from the users. Our protocols enable User 2 to obtain the decrypted text while preserving these secrecy requirements. Additionally, the second protocol ensures the "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2606.01949","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-06-01T09:10:00Z","cross_cats_sorted":[],"title_canon_sha256":"715048463b7443130fe267207b372eabcef9f4c3a0535526d9b8ff5c00188d70","abstract_canon_sha256":"a0f0c32621a655eb5c25a82e85cc602dc5620d457c8d2f93f1dfbfd29a97927f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-02T02:05:01.347766Z","signature_b64":"kDdjCgeOpIfxx1dwBJS2oXRrERxCnwKLTwDpjuvnD+GN7CmRUMEj/ZGzQ2mpFXN0tRR4UFr+VMSZYD3oE6whDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2a73f52dd704d8dd3e07c88afb96a51816a818fb61a1fc3950c979785e5905e2","last_reissued_at":"2026-06-02T02:05:01.347206Z","signature_status":"signed_v1","first_computed_at":"2026-06-02T02:05:01.347206Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Quantum secure blind decryption with two users","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Masahito Hayashi, Yuki Ito","submitted_at":"2026-06-01T09:10:00Z","abstract_excerpt":"We propose two types of protocols for quantum secure blind decryption, involving two users and servers. User 1 holds the encrypted ciphertext. The servers store several indexed keys including the key encrypting the ciphertext. User 2 aims to obtain the decrypted text. The protocols are designed to preserve the following types of secrecy: Users ensure the secrecy of the text from the servers. Servers maintain the secrecy of the keys from the users. Our protocols enable User 2 to obtain the decrypted text while preserving these secrecy requirements. Additionally, the second protocol ensures the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.01949","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/2606.01949/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2606.01949","created_at":"2026-06-02T02:05:01.347372+00:00"},{"alias_kind":"arxiv_version","alias_value":"2606.01949v1","created_at":"2026-06-02T02:05:01.347372+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.01949","created_at":"2026-06-02T02:05:01.347372+00:00"},{"alias_kind":"pith_short_12","alias_value":"FJZ7KLOXATMN","created_at":"2026-06-02T02:05:01.347372+00:00"},{"alias_kind":"pith_short_16","alias_value":"FJZ7KLOXATMN2PQH","created_at":"2026-06-02T02:05:01.347372+00:00"},{"alias_kind":"pith_short_8","alias_value":"FJZ7KLOX","created_at":"2026-06-02T02:05:01.347372+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/FJZ7KLOXATMN2PQHZCFPXFVFDA","json":"https://pith.science/pith/FJZ7KLOXATMN2PQHZCFPXFVFDA.json","graph_json":"https://pith.science/api/pith-number/FJZ7KLOXATMN2PQHZCFPXFVFDA/graph.json","events_json":"https://pith.science/api/pith-number/FJZ7KLOXATMN2PQHZCFPXFVFDA/events.json","paper":"https://pith.science/paper/FJZ7KLOX"},"agent_actions":{"view_html":"https://pith.science/pith/FJZ7KLOXATMN2PQHZCFPXFVFDA","download_json":"https://pith.science/pith/FJZ7KLOXATMN2PQHZCFPXFVFDA.json","view_paper":"https://pith.science/paper/FJZ7KLOX","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2606.01949&json=true","fetch_graph":"https://pith.science/api/pith-number/FJZ7KLOXATMN2PQHZCFPXFVFDA/graph.json","fetch_events":"https://pith.science/api/pith-number/FJZ7KLOXATMN2PQHZCFPXFVFDA/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FJZ7KLOXATMN2PQHZCFPXFVFDA/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FJZ7KLOXATMN2PQHZCFPXFVFDA/action/storage_attestation","attest_author":"https://pith.science/pith/FJZ7KLOXATMN2PQHZCFPXFVFDA/action/author_attestation","sign_citation":"https://pith.science/pith/FJZ7KLOXATMN2PQHZCFPXFVFDA/action/citation_signature","submit_replication":"https://pith.science/pith/FJZ7KLOXATMN2PQHZCFPXFVFDA/action/replication_record"}},"created_at":"2026-06-02T02:05:01.347372+00:00","updated_at":"2026-06-02T02:05:01.347372+00:00"}