{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:ROPXNWPQRKSNFLCTIV2ZAHTTJE","short_pith_number":"pith:ROPXNWPQ","canonical_record":{"source":{"id":"1508.07690","kind":"arxiv","version":5},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2015-08-31T05:36:56Z","cross_cats_sorted":[],"title_canon_sha256":"b81e05b33c8cd7ffa30c4ede05a15305a81a704ec2b7d02159ada67b858d0d3e","abstract_canon_sha256":"31aba878b68152a0e5080fe02bc606ec077e74e1fdae9598470637a107b6e147"},"schema_version":"1.0"},"canonical_sha256":"8b9f76d9f08aa4d2ac534575901e7349102a6a07d837a5a83faa723bcf564fd1","source":{"kind":"arxiv","id":"1508.07690","version":5},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.07690","created_at":"2026-05-18T00:39:57Z"},{"alias_kind":"arxiv_version","alias_value":"1508.07690v5","created_at":"2026-05-18T00:39:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.07690","created_at":"2026-05-18T00:39:57Z"},{"alias_kind":"pith_short_12","alias_value":"ROPXNWPQRKSN","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"ROPXNWPQRKSNFLCT","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"ROPXNWPQ","created_at":"2026-05-18T12:29:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:ROPXNWPQRKSNFLCTIV2ZAHTTJE","target":"record","payload":{"canonical_record":{"source":{"id":"1508.07690","kind":"arxiv","version":5},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2015-08-31T05:36:56Z","cross_cats_sorted":[],"title_canon_sha256":"b81e05b33c8cd7ffa30c4ede05a15305a81a704ec2b7d02159ada67b858d0d3e","abstract_canon_sha256":"31aba878b68152a0e5080fe02bc606ec077e74e1fdae9598470637a107b6e147"},"schema_version":"1.0"},"canonical_sha256":"8b9f76d9f08aa4d2ac534575901e7349102a6a07d837a5a83faa723bcf564fd1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:39:57.101313Z","signature_b64":"Z3iQ1Z112gA3Mv62poHs24syWsW5HZS/ivmBVlhii04ku5pc4y9OlvJ+7lRTbsmq6quF46ke1AJQ63h0dIreDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8b9f76d9f08aa4d2ac534575901e7349102a6a07d837a5a83faa723bcf564fd1","last_reissued_at":"2026-05-18T00:39:57.100870Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:39:57.100870Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1508.07690","source_version":5,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:39:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QI4D6jxtMzygEMlbXbedVyod9Md/x6W4r/3fTMNAYEn+6WNEExQMYTGVPPz7XDxp0hFcvFO2sRRWam5Xxe/nDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T02:32:35.144258Z"},"content_sha256":"868c8a50fb18c134c95a97fa3b49755b0ea8fb0216c81d9d6b8187a91004e1af","schema_version":"1.0","event_id":"sha256:868c8a50fb18c134c95a97fa3b49755b0ea8fb0216c81d9d6b8187a91004e1af"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:ROPXNWPQRKSNFLCTIV2ZAHTTJE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Secure Multi-Party Computation with a Helper","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CR","authors_text":"Johannes Schneider","submitted_at":"2015-08-31T05:36:56Z","abstract_excerpt":"A client wishes to outsource computation on confidential data to a network of parties. He does not trust a single party but believes that multiple parties do not collude. To solve this problem, we use the idea of treating one of the parties as a helper. A helper assists computation only. Often using more parties ensures confidentiality despite more corrupted parties. This does not hold for adding a helper. But a helper can in some cases lower the amount of communication asymptotically to the theoretical minimum of one bit per AND gate, improving significantly on schemes without a helper. It ca"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.07690","kind":"arxiv","version":5},"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":"2026-05-18T00:39:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rCBEnXQ/wf5hev5h4Xs9oRBf23Ea3e6TinCL3/kLm/MzIo+CP2nQ86FuBCTj7As14LIDInfRK8rPaOYLLQPMCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T02:32:35.144837Z"},"content_sha256":"d46221a6c9abf3a5fa26cea0afcf27d42db799d9dd8a47e75bbd895d825ede61","schema_version":"1.0","event_id":"sha256:d46221a6c9abf3a5fa26cea0afcf27d42db799d9dd8a47e75bbd895d825ede61"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ROPXNWPQRKSNFLCTIV2ZAHTTJE/bundle.json","state_url":"https://pith.science/pith/ROPXNWPQRKSNFLCTIV2ZAHTTJE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ROPXNWPQRKSNFLCTIV2ZAHTTJE/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":"2026-06-04T02:32:35Z","links":{"resolver":"https://pith.science/pith/ROPXNWPQRKSNFLCTIV2ZAHTTJE","bundle":"https://pith.science/pith/ROPXNWPQRKSNFLCTIV2ZAHTTJE/bundle.json","state":"https://pith.science/pith/ROPXNWPQRKSNFLCTIV2ZAHTTJE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ROPXNWPQRKSNFLCTIV2ZAHTTJE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:ROPXNWPQRKSNFLCTIV2ZAHTTJE","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":"31aba878b68152a0e5080fe02bc606ec077e74e1fdae9598470637a107b6e147","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2015-08-31T05:36:56Z","title_canon_sha256":"b81e05b33c8cd7ffa30c4ede05a15305a81a704ec2b7d02159ada67b858d0d3e"},"schema_version":"1.0","source":{"id":"1508.07690","kind":"arxiv","version":5}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.07690","created_at":"2026-05-18T00:39:57Z"},{"alias_kind":"arxiv_version","alias_value":"1508.07690v5","created_at":"2026-05-18T00:39:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.07690","created_at":"2026-05-18T00:39:57Z"},{"alias_kind":"pith_short_12","alias_value":"ROPXNWPQRKSN","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"ROPXNWPQRKSNFLCT","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"ROPXNWPQ","created_at":"2026-05-18T12:29:39Z"}],"graph_snapshots":[{"event_id":"sha256:d46221a6c9abf3a5fa26cea0afcf27d42db799d9dd8a47e75bbd895d825ede61","target":"graph","created_at":"2026-05-18T00:39:57Z","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":"A client wishes to outsource computation on confidential data to a network of parties. He does not trust a single party but believes that multiple parties do not collude. To solve this problem, we use the idea of treating one of the parties as a helper. A helper assists computation only. Often using more parties ensures confidentiality despite more corrupted parties. This does not hold for adding a helper. But a helper can in some cases lower the amount of communication asymptotically to the theoretical minimum of one bit per AND gate, improving significantly on schemes without a helper. It ca","authors_text":"Johannes Schneider","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2015-08-31T05:36:56Z","title":"Secure Multi-Party Computation with a Helper"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.07690","kind":"arxiv","version":5},"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":"sha256:868c8a50fb18c134c95a97fa3b49755b0ea8fb0216c81d9d6b8187a91004e1af","target":"record","created_at":"2026-05-18T00:39:57Z","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":"31aba878b68152a0e5080fe02bc606ec077e74e1fdae9598470637a107b6e147","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2015-08-31T05:36:56Z","title_canon_sha256":"b81e05b33c8cd7ffa30c4ede05a15305a81a704ec2b7d02159ada67b858d0d3e"},"schema_version":"1.0","source":{"id":"1508.07690","kind":"arxiv","version":5}},"canonical_sha256":"8b9f76d9f08aa4d2ac534575901e7349102a6a07d837a5a83faa723bcf564fd1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8b9f76d9f08aa4d2ac534575901e7349102a6a07d837a5a83faa723bcf564fd1","first_computed_at":"2026-05-18T00:39:57.100870Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:39:57.100870Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Z3iQ1Z112gA3Mv62poHs24syWsW5HZS/ivmBVlhii04ku5pc4y9OlvJ+7lRTbsmq6quF46ke1AJQ63h0dIreDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:39:57.101313Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.07690","source_kind":"arxiv","source_version":5}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:868c8a50fb18c134c95a97fa3b49755b0ea8fb0216c81d9d6b8187a91004e1af","sha256:d46221a6c9abf3a5fa26cea0afcf27d42db799d9dd8a47e75bbd895d825ede61"],"state_sha256":"74dca61629f0e89b98068880ce2f27b450cc74fb2187cd2d9782ee9c9c431872"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qbtil7kmlRWgM5SIDFQ7yL9kLD9upEfESqYRu2mXG8sbdPOPXcsMEVH66JZkZemIy/WpMGCjcEwhL466b5FjDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T02:32:35.147682Z","bundle_sha256":"0073afb743ea8587b1e9fd405fb867084652c3da20c19384283c44e7e42ba49e"}}