{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:K4CJ2JRCSG3JDHJTRCEYQGVP4Y","short_pith_number":"pith:K4CJ2JRC","canonical_record":{"source":{"id":"2602.21343","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.NI","submitted_at":"2026-02-24T20:24:42Z","cross_cats_sorted":[],"title_canon_sha256":"9e354be754d3769c197051e8b22ef404907a08a52a39ce8ba8cd35c52f070b4a","abstract_canon_sha256":"8745afffb5291ef663a2490cd459b3713b3eb622c1cda7e89d9cfe2775b4e092"},"schema_version":"1.0"},"canonical_sha256":"57049d262291b6919d338889881aafe610010c25540985c49dbf8df94c88db93","source":{"kind":"arxiv","id":"2602.21343","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2602.21343","created_at":"2026-06-30T02:17:16Z"},{"alias_kind":"arxiv_version","alias_value":"2602.21343v2","created_at":"2026-06-30T02:17:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2602.21343","created_at":"2026-06-30T02:17:16Z"},{"alias_kind":"pith_short_12","alias_value":"K4CJ2JRCSG3J","created_at":"2026-06-30T02:17:16Z"},{"alias_kind":"pith_short_16","alias_value":"K4CJ2JRCSG3JDHJT","created_at":"2026-06-30T02:17:16Z"},{"alias_kind":"pith_short_8","alias_value":"K4CJ2JRC","created_at":"2026-06-30T02:17:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:K4CJ2JRCSG3JDHJTRCEYQGVP4Y","target":"record","payload":{"canonical_record":{"source":{"id":"2602.21343","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.NI","submitted_at":"2026-02-24T20:24:42Z","cross_cats_sorted":[],"title_canon_sha256":"9e354be754d3769c197051e8b22ef404907a08a52a39ce8ba8cd35c52f070b4a","abstract_canon_sha256":"8745afffb5291ef663a2490cd459b3713b3eb622c1cda7e89d9cfe2775b4e092"},"schema_version":"1.0"},"canonical_sha256":"57049d262291b6919d338889881aafe610010c25540985c49dbf8df94c88db93","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-30T02:17:16.809710Z","signature_b64":"/D8IlEU4D563Ht7Uci+Ge7qyG8vfXNbeMrQAI/NxZE9fxyoNAsNIyKz+btRNXlAFat5iiJV5r55+GPg0RnJ/Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"57049d262291b6919d338889881aafe610010c25540985c49dbf8df94c88db93","last_reissued_at":"2026-06-30T02:17:16.809060Z","signature_status":"signed_v1","first_computed_at":"2026-06-30T02:17:16.809060Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2602.21343","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":"2026-06-30T02:17:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RuBbtWo/CQf7aGygXTrMaKpcmZ52F8aZPgobb/5JqANB+eLfflCL2uaQQLCfktmgExeOVA/AdzTvyrt+X/V4Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T22:09:08.231548Z"},"content_sha256":"0cb549c90a090fe286c1901fffa1a58e986d71d9efbbefb9f5fb52ab4110e448","schema_version":"1.0","event_id":"sha256:0cb549c90a090fe286c1901fffa1a58e986d71d9efbbefb9f5fb52ab4110e448"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:K4CJ2JRCSG3JDHJTRCEYQGVP4Y","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"UnlinkableDFL: A Framework for Network-Layer Unlinkability in Decentralized Federated Learning","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.NI","authors_text":"Burkhard Stiller, Chao Feng, Gerome Bovet, Jan von der Assen, Linn Anna Spitz, Sandrin Raphael Hunkeler, Thomas Grubl","submitted_at":"2026-02-24T20:24:42Z","abstract_excerpt":"Decentralized Federated Learning (DFL) removes the central aggregator of conventional Federated Learning, but peer-to-peer model exchange still exposes network traces: who communicates, when fragments move, and which packets correlate across rounds. This paper studies network-layer sender--message linkability for DFL model sharing and presents UnlinkableDFL, a framework in which every participant acts as both a learner and a peer-based mix relay. Shareable model states are split into uniform, onion-encrypted fragment packets and carried over a peer-run mixnet with cover traffic, randomized del"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2602.21343","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2602.21343/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-30T02:17:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mbRt6L2JKcXt06+HdfipzLDZPYgVksiys4ujbK1yVUOKoGpo8V0c32MWcBx1WJk7hL98sgbMcH4vEV2uu8p1AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T22:09:08.231925Z"},"content_sha256":"82c6ba9b5e7f2b25d7845de0ef800eec489e32eb00e94b4d04d69ff433ab376f","schema_version":"1.0","event_id":"sha256:82c6ba9b5e7f2b25d7845de0ef800eec489e32eb00e94b4d04d69ff433ab376f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/K4CJ2JRCSG3JDHJTRCEYQGVP4Y/bundle.json","state_url":"https://pith.science/pith/K4CJ2JRCSG3JDHJTRCEYQGVP4Y/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/K4CJ2JRCSG3JDHJTRCEYQGVP4Y/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":"2026-07-02T22:09:08Z","links":{"resolver":"https://pith.science/pith/K4CJ2JRCSG3JDHJTRCEYQGVP4Y","bundle":"https://pith.science/pith/K4CJ2JRCSG3JDHJTRCEYQGVP4Y/bundle.json","state":"https://pith.science/pith/K4CJ2JRCSG3JDHJTRCEYQGVP4Y/state.json","well_known_bundle":"https://pith.science/.well-known/pith/K4CJ2JRCSG3JDHJTRCEYQGVP4Y/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:K4CJ2JRCSG3JDHJTRCEYQGVP4Y","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":"8745afffb5291ef663a2490cd459b3713b3eb622c1cda7e89d9cfe2775b4e092","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.NI","submitted_at":"2026-02-24T20:24:42Z","title_canon_sha256":"9e354be754d3769c197051e8b22ef404907a08a52a39ce8ba8cd35c52f070b4a"},"schema_version":"1.0","source":{"id":"2602.21343","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2602.21343","created_at":"2026-06-30T02:17:16Z"},{"alias_kind":"arxiv_version","alias_value":"2602.21343v2","created_at":"2026-06-30T02:17:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2602.21343","created_at":"2026-06-30T02:17:16Z"},{"alias_kind":"pith_short_12","alias_value":"K4CJ2JRCSG3J","created_at":"2026-06-30T02:17:16Z"},{"alias_kind":"pith_short_16","alias_value":"K4CJ2JRCSG3JDHJT","created_at":"2026-06-30T02:17:16Z"},{"alias_kind":"pith_short_8","alias_value":"K4CJ2JRC","created_at":"2026-06-30T02:17:16Z"}],"graph_snapshots":[{"event_id":"sha256:82c6ba9b5e7f2b25d7845de0ef800eec489e32eb00e94b4d04d69ff433ab376f","target":"graph","created_at":"2026-06-30T02:17:16Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2602.21343/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Decentralized Federated Learning (DFL) removes the central aggregator of conventional Federated Learning, but peer-to-peer model exchange still exposes network traces: who communicates, when fragments move, and which packets correlate across rounds. This paper studies network-layer sender--message linkability for DFL model sharing and presents UnlinkableDFL, a framework in which every participant acts as both a learner and a peer-based mix relay. Shareable model states are split into uniform, onion-encrypted fragment packets and carried over a peer-run mixnet with cover traffic, randomized del","authors_text":"Burkhard Stiller, Chao Feng, Gerome Bovet, Jan von der Assen, Linn Anna Spitz, Sandrin Raphael Hunkeler, Thomas Grubl","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.NI","submitted_at":"2026-02-24T20:24:42Z","title":"UnlinkableDFL: A Framework for Network-Layer Unlinkability in Decentralized Federated Learning"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2602.21343","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":"sha256:0cb549c90a090fe286c1901fffa1a58e986d71d9efbbefb9f5fb52ab4110e448","target":"record","created_at":"2026-06-30T02:17:16Z","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":"8745afffb5291ef663a2490cd459b3713b3eb622c1cda7e89d9cfe2775b4e092","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.NI","submitted_at":"2026-02-24T20:24:42Z","title_canon_sha256":"9e354be754d3769c197051e8b22ef404907a08a52a39ce8ba8cd35c52f070b4a"},"schema_version":"1.0","source":{"id":"2602.21343","kind":"arxiv","version":2}},"canonical_sha256":"57049d262291b6919d338889881aafe610010c25540985c49dbf8df94c88db93","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"57049d262291b6919d338889881aafe610010c25540985c49dbf8df94c88db93","first_computed_at":"2026-06-30T02:17:16.809060Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-30T02:17:16.809060Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/D8IlEU4D563Ht7Uci+Ge7qyG8vfXNbeMrQAI/NxZE9fxyoNAsNIyKz+btRNXlAFat5iiJV5r55+GPg0RnJ/Dw==","signature_status":"signed_v1","signed_at":"2026-06-30T02:17:16.809710Z","signed_message":"canonical_sha256_bytes"},"source_id":"2602.21343","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0cb549c90a090fe286c1901fffa1a58e986d71d9efbbefb9f5fb52ab4110e448","sha256:82c6ba9b5e7f2b25d7845de0ef800eec489e32eb00e94b4d04d69ff433ab376f"],"state_sha256":"9c24270f6463150a8a504cce1cacab956c01dcd3f2c98d57d13fc86011dee50b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"quafV4bQGGHbU1+Wz4RI839DsV24FtMvQIiSnxMFonC+cEMSbGxjWwBAHnX4QcW/t2MJiktWDDD/Z/UwDqxJDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-02T22:09:08.233937Z","bundle_sha256":"821018133fb515991676764a34ff974f451f39698c9843e1a027f4094a4286b3"}}