{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:E5DBTQOGW2NH6J5KAWID37SPTE","short_pith_number":"pith:E5DBTQOG","canonical_record":{"source":{"id":"1904.11597","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2019-04-25T21:29:26Z","cross_cats_sorted":[],"title_canon_sha256":"112937c31a5a7fe6f74544ecc279eb16cd1ebd612c69e8dc2d9b647bd6f90906","abstract_canon_sha256":"0659a1b9370794c7c95f77738939e698577ac04e312ba64a38660b2621824020"},"schema_version":"1.0"},"canonical_sha256":"274619c1c6b69a7f27aa05903dfe4f990b359062dd1946bf52ebc73104da6412","source":{"kind":"arxiv","id":"1904.11597","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.11597","created_at":"2026-05-17T23:47:43Z"},{"alias_kind":"arxiv_version","alias_value":"1904.11597v1","created_at":"2026-05-17T23:47:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.11597","created_at":"2026-05-17T23:47:43Z"},{"alias_kind":"pith_short_12","alias_value":"E5DBTQOGW2NH","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"E5DBTQOGW2NH6J5K","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"E5DBTQOG","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:E5DBTQOGW2NH6J5KAWID37SPTE","target":"record","payload":{"canonical_record":{"source":{"id":"1904.11597","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2019-04-25T21:29:26Z","cross_cats_sorted":[],"title_canon_sha256":"112937c31a5a7fe6f74544ecc279eb16cd1ebd612c69e8dc2d9b647bd6f90906","abstract_canon_sha256":"0659a1b9370794c7c95f77738939e698577ac04e312ba64a38660b2621824020"},"schema_version":"1.0"},"canonical_sha256":"274619c1c6b69a7f27aa05903dfe4f990b359062dd1946bf52ebc73104da6412","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:47:43.260684Z","signature_b64":"/sMJmN9lkJKePbkMoYSB70wyD/C1p/HJMb+Fdya82gmuC4nYMHCaa61SGaI9EWcU912uK0XPvQDUkY5oae3IDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"274619c1c6b69a7f27aa05903dfe4f990b359062dd1946bf52ebc73104da6412","last_reissued_at":"2026-05-17T23:47:43.260198Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:47:43.260198Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.11597","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":"2026-05-17T23:47:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iaEqwiKMGCQCAYx6SLcAEBeXpdWl1jevg8OKAYyA4bn1EhwXpHG7ZuemJcokI99lVHx8hMATuQ6UUozTY9wRBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-01T12:36:14.580451Z"},"content_sha256":"63075ca38dcd45eefed2a6561fad451832ea129b03fb80ce0946390f0d7f9134","schema_version":"1.0","event_id":"sha256:63075ca38dcd45eefed2a6561fad451832ea129b03fb80ce0946390f0d7f9134"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:E5DBTQOGW2NH6J5KAWID37SPTE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A New Cyber-Secure Countermeasure for LTI systems under DoS attacks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.SY","authors_text":"Aranya Chakrabortty, Nandini Negi, Nilanjan Roy Chowdhury","submitted_at":"2019-04-25T21:29:26Z","abstract_excerpt":"This paper presents a new counter-measure to mitigate denial-of-service cyber-attacks in linear time-invariant (LTI) systems. We first design a sparse linear quadratic regulator (LQR) optimal controller for a given LTI plant and evaluate the priority of the feedback communication links in terms of the loss of closed-loop performance when the corresponding block of the feedback gain matrix is removed. An attacker may know about this priority ordering, and thereby attack the links with the highest priority. To prevent this, we present a message rerouting strategy by which the states that are sch"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.11597","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":"2026-05-17T23:47:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZMcTctdFMoZjawAXv7l14Dmc+SSkY5ds7myrCxxIzBixWCEOOfbCNlC6INjmfEQjnQ4zRWIqmpyn8PerkHGbDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-01T12:36:14.580794Z"},"content_sha256":"600fc662c793b3623083270b422915a99d43de606c62e6204a6b24805126c3a0","schema_version":"1.0","event_id":"sha256:600fc662c793b3623083270b422915a99d43de606c62e6204a6b24805126c3a0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/E5DBTQOGW2NH6J5KAWID37SPTE/bundle.json","state_url":"https://pith.science/pith/E5DBTQOGW2NH6J5KAWID37SPTE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/E5DBTQOGW2NH6J5KAWID37SPTE/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":"2026-07-01T12:36:14Z","links":{"resolver":"https://pith.science/pith/E5DBTQOGW2NH6J5KAWID37SPTE","bundle":"https://pith.science/pith/E5DBTQOGW2NH6J5KAWID37SPTE/bundle.json","state":"https://pith.science/pith/E5DBTQOGW2NH6J5KAWID37SPTE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/E5DBTQOGW2NH6J5KAWID37SPTE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:E5DBTQOGW2NH6J5KAWID37SPTE","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":"0659a1b9370794c7c95f77738939e698577ac04e312ba64a38660b2621824020","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2019-04-25T21:29:26Z","title_canon_sha256":"112937c31a5a7fe6f74544ecc279eb16cd1ebd612c69e8dc2d9b647bd6f90906"},"schema_version":"1.0","source":{"id":"1904.11597","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.11597","created_at":"2026-05-17T23:47:43Z"},{"alias_kind":"arxiv_version","alias_value":"1904.11597v1","created_at":"2026-05-17T23:47:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.11597","created_at":"2026-05-17T23:47:43Z"},{"alias_kind":"pith_short_12","alias_value":"E5DBTQOGW2NH","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"E5DBTQOGW2NH6J5K","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"E5DBTQOG","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:600fc662c793b3623083270b422915a99d43de606c62e6204a6b24805126c3a0","target":"graph","created_at":"2026-05-17T23:47:43Z","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":"This paper presents a new counter-measure to mitigate denial-of-service cyber-attacks in linear time-invariant (LTI) systems. We first design a sparse linear quadratic regulator (LQR) optimal controller for a given LTI plant and evaluate the priority of the feedback communication links in terms of the loss of closed-loop performance when the corresponding block of the feedback gain matrix is removed. An attacker may know about this priority ordering, and thereby attack the links with the highest priority. To prevent this, we present a message rerouting strategy by which the states that are sch","authors_text":"Aranya Chakrabortty, Nandini Negi, Nilanjan Roy Chowdhury","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2019-04-25T21:29:26Z","title":"A New Cyber-Secure Countermeasure for LTI systems under DoS attacks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.11597","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":"sha256:63075ca38dcd45eefed2a6561fad451832ea129b03fb80ce0946390f0d7f9134","target":"record","created_at":"2026-05-17T23:47:43Z","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":"0659a1b9370794c7c95f77738939e698577ac04e312ba64a38660b2621824020","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2019-04-25T21:29:26Z","title_canon_sha256":"112937c31a5a7fe6f74544ecc279eb16cd1ebd612c69e8dc2d9b647bd6f90906"},"schema_version":"1.0","source":{"id":"1904.11597","kind":"arxiv","version":1}},"canonical_sha256":"274619c1c6b69a7f27aa05903dfe4f990b359062dd1946bf52ebc73104da6412","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"274619c1c6b69a7f27aa05903dfe4f990b359062dd1946bf52ebc73104da6412","first_computed_at":"2026-05-17T23:47:43.260198Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:47:43.260198Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/sMJmN9lkJKePbkMoYSB70wyD/C1p/HJMb+Fdya82gmuC4nYMHCaa61SGaI9EWcU912uK0XPvQDUkY5oae3IDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:47:43.260684Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.11597","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:63075ca38dcd45eefed2a6561fad451832ea129b03fb80ce0946390f0d7f9134","sha256:600fc662c793b3623083270b422915a99d43de606c62e6204a6b24805126c3a0"],"state_sha256":"ccb5365540778f8c62bd3acd90a335c41c018209a7239a12355a331ccae341f6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oomhD5fU48V9wam25xhvKBYS3h/Yy4uyLR/ogbPh1cz8S9ABsylj6QIV1YF/Fk6a5E/2DL+FYASdFGwBzC3FBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-01T12:36:14.582747Z","bundle_sha256":"0439ce1749b0f9d60503171abd9be02e0a8dc8c94c6ea7920a901a80d1f76877"}}