{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:UHUVMVBLFKGAHHPSIYYXEAANZZ","short_pith_number":"pith:UHUVMVBL","canonical_record":{"source":{"id":"1807.05764","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2018-07-16T10:01:47Z","cross_cats_sorted":["cs.AR","eess.SP"],"title_canon_sha256":"0118f78b9db587d4ab296ede5aa767fca5ec4cbb32e82c634622c1ee1fc1967e","abstract_canon_sha256":"08fa6d92d92c2a9b4d89b29700a360b58123f97f0d79fabbf1942e7188122b36"},"schema_version":"1.0"},"canonical_sha256":"a1e956542b2a8c039df2463172000dce581f651842d59069f7258b406da103da","source":{"kind":"arxiv","id":"1807.05764","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.05764","created_at":"2026-05-17T23:41:17Z"},{"alias_kind":"arxiv_version","alias_value":"1807.05764v2","created_at":"2026-05-17T23:41:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.05764","created_at":"2026-05-17T23:41:17Z"},{"alias_kind":"pith_short_12","alias_value":"UHUVMVBLFKGA","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"UHUVMVBLFKGAHHPS","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"UHUVMVBL","created_at":"2026-05-18T12:32:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:UHUVMVBLFKGAHHPSIYYXEAANZZ","target":"record","payload":{"canonical_record":{"source":{"id":"1807.05764","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2018-07-16T10:01:47Z","cross_cats_sorted":["cs.AR","eess.SP"],"title_canon_sha256":"0118f78b9db587d4ab296ede5aa767fca5ec4cbb32e82c634622c1ee1fc1967e","abstract_canon_sha256":"08fa6d92d92c2a9b4d89b29700a360b58123f97f0d79fabbf1942e7188122b36"},"schema_version":"1.0"},"canonical_sha256":"a1e956542b2a8c039df2463172000dce581f651842d59069f7258b406da103da","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:41:17.978652Z","signature_b64":"/TWbS0rPPktUyWOMiocj1AbQoXdXW1y2Ehqs5jawCAISyQjDDxKq0Rw5iRIAfAKRf7qEXg7DE8EQfPN7yWJoDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a1e956542b2a8c039df2463172000dce581f651842d59069f7258b406da103da","last_reissued_at":"2026-05-17T23:41:17.978120Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:41:17.978120Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.05764","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:41:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FN9sRZgc6IDsnH9TIRWEmtJYg1WX2ydo5ZP/vpGsabpEbPXJ/BvbaIUeY8ME60gdsm/lu562SASfG8eKVm/kBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T04:09:51.146607Z"},"content_sha256":"9470f89c8d8d5078358c9b785650806b33dfef86e91054e00d80c48538dd0bd2","schema_version":"1.0","event_id":"sha256:9470f89c8d8d5078358c9b785650806b33dfef86e91054e00d80c48538dd0bd2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:UHUVMVBLFKGAHHPSIYYXEAANZZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Lyra2 FPGA Core for Lyra2REv2-Based Cryptocurrencies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.AR","eess.SP"],"primary_cat":"cs.CR","authors_text":"Alexios Balatsoukas-Stimming, Louis-Charles Trudeau, Michiel Van Beirendonck, Pascal Giard","submitted_at":"2018-07-16T10:01:47Z","abstract_excerpt":"Lyra2REv2 is a hashing algorithm that consists of a chain of individual hashing algorithms and it is used as a proof-of-work function in several cryptocurrencies that aim to be ASIC-resistant. The most crucial hashing algorithm in the Lyra2REv2 chain is a specific instance of the general Lyra2 algorithm. In this work we present the first FPGA implementation of the aforementioned instance of Lyra2 and we explain how several properties of the algorithm can be exploited in order to optimize the design."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.05764","kind":"arxiv","version":2},"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":"2026-05-17T23:41:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5iVmpHwjl47AZBmtGYjtmkMPnzi+zD8pI48kkYWtnx/XVX8mdzi6kw5bL0HjkAT0m7DyQ932cR4pnmfZakHQAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T04:09:51.147133Z"},"content_sha256":"0584fa2fb739aab2b1905d07ee5668ec6241111e6a2b8d0228cba844d9d0a5df","schema_version":"1.0","event_id":"sha256:0584fa2fb739aab2b1905d07ee5668ec6241111e6a2b8d0228cba844d9d0a5df"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UHUVMVBLFKGAHHPSIYYXEAANZZ/bundle.json","state_url":"https://pith.science/pith/UHUVMVBLFKGAHHPSIYYXEAANZZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UHUVMVBLFKGAHHPSIYYXEAANZZ/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":"2026-05-26T04:09:51Z","links":{"resolver":"https://pith.science/pith/UHUVMVBLFKGAHHPSIYYXEAANZZ","bundle":"https://pith.science/pith/UHUVMVBLFKGAHHPSIYYXEAANZZ/bundle.json","state":"https://pith.science/pith/UHUVMVBLFKGAHHPSIYYXEAANZZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UHUVMVBLFKGAHHPSIYYXEAANZZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:UHUVMVBLFKGAHHPSIYYXEAANZZ","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":"08fa6d92d92c2a9b4d89b29700a360b58123f97f0d79fabbf1942e7188122b36","cross_cats_sorted":["cs.AR","eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2018-07-16T10:01:47Z","title_canon_sha256":"0118f78b9db587d4ab296ede5aa767fca5ec4cbb32e82c634622c1ee1fc1967e"},"schema_version":"1.0","source":{"id":"1807.05764","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.05764","created_at":"2026-05-17T23:41:17Z"},{"alias_kind":"arxiv_version","alias_value":"1807.05764v2","created_at":"2026-05-17T23:41:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.05764","created_at":"2026-05-17T23:41:17Z"},{"alias_kind":"pith_short_12","alias_value":"UHUVMVBLFKGA","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"UHUVMVBLFKGAHHPS","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"UHUVMVBL","created_at":"2026-05-18T12:32:56Z"}],"graph_snapshots":[{"event_id":"sha256:0584fa2fb739aab2b1905d07ee5668ec6241111e6a2b8d0228cba844d9d0a5df","target":"graph","created_at":"2026-05-17T23:41:17Z","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":"Lyra2REv2 is a hashing algorithm that consists of a chain of individual hashing algorithms and it is used as a proof-of-work function in several cryptocurrencies that aim to be ASIC-resistant. The most crucial hashing algorithm in the Lyra2REv2 chain is a specific instance of the general Lyra2 algorithm. In this work we present the first FPGA implementation of the aforementioned instance of Lyra2 and we explain how several properties of the algorithm can be exploited in order to optimize the design.","authors_text":"Alexios Balatsoukas-Stimming, Louis-Charles Trudeau, Michiel Van Beirendonck, Pascal Giard","cross_cats":["cs.AR","eess.SP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2018-07-16T10:01:47Z","title":"A Lyra2 FPGA Core for Lyra2REv2-Based Cryptocurrencies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.05764","kind":"arxiv","version":2},"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":"sha256:9470f89c8d8d5078358c9b785650806b33dfef86e91054e00d80c48538dd0bd2","target":"record","created_at":"2026-05-17T23:41:17Z","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":"08fa6d92d92c2a9b4d89b29700a360b58123f97f0d79fabbf1942e7188122b36","cross_cats_sorted":["cs.AR","eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CR","submitted_at":"2018-07-16T10:01:47Z","title_canon_sha256":"0118f78b9db587d4ab296ede5aa767fca5ec4cbb32e82c634622c1ee1fc1967e"},"schema_version":"1.0","source":{"id":"1807.05764","kind":"arxiv","version":2}},"canonical_sha256":"a1e956542b2a8c039df2463172000dce581f651842d59069f7258b406da103da","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a1e956542b2a8c039df2463172000dce581f651842d59069f7258b406da103da","first_computed_at":"2026-05-17T23:41:17.978120Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:41:17.978120Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/TWbS0rPPktUyWOMiocj1AbQoXdXW1y2Ehqs5jawCAISyQjDDxKq0Rw5iRIAfAKRf7qEXg7DE8EQfPN7yWJoDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:41:17.978652Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.05764","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9470f89c8d8d5078358c9b785650806b33dfef86e91054e00d80c48538dd0bd2","sha256:0584fa2fb739aab2b1905d07ee5668ec6241111e6a2b8d0228cba844d9d0a5df"],"state_sha256":"7169a0e82b3bb50879dcac3bbe772d0d6aa7fe55ea4b40573225bcb461ca0cb1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2H9UwU5PIcsCObUI8VbPyoM4RkUY5brYmkfRXCyiuEBGhEqRasZK0OgRkjfY5q9xT1exiYZ2iBmiN3GkBuQ0BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T04:09:51.150567Z","bundle_sha256":"2d6171650b800f23445554bfbd84a672261467510863d0ae0987b553267b84e3"}}