{"data":{"id":"4cecc149-3c28-48b4-8dab-314ad8fb60d1","title":"Teleportation: Defense Against Stealing Attacks of Data-Driven Healthcare APIs","summary":"The paper proposes a defense against model-extraction attacks on data-driven healthcare APIs built on electronic health records. The method applies adaptive teleportation to incoming queries, guided by a bi-level optimization target and Wasserstein gradient flows, to push attack queries across decision boundaries while limiting changes to benign queries. Tested on in-hospital mortality, bleed risk and ischemic risk prediction, it suppresses cloned-model performance while keeping comparable serving utility to existing defenses.","solution":"The proposed defense is adaptive teleportation of incoming queries, generated from the formulated bi-level optimization target and following Wasserstein gradient flows (WGFs), to mislead attacking queries while preserving benign-query utility.","labels":["security","research"],"sourceUrl":"http://ieeexplore.ieee.org/document/11099051","publishedAt":"2025-07-29T13:17:16.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":["model_theft","data_extraction"],"issueType":"research","affectedPackages":null,"affectedPackageNames":null,"affectedPackageRefs":null,"affectedVendors":[],"affectedVendorsRaw":[],"classifierModel":"claude-haiku-5-5","classifierPromptVersion":"v4","summaryPromptVersion":"v2","headline":null,"headlinePromptVersion":null,"cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"epssCheckedAt":null,"kevDateAdded":null,"advisoryAliases":null,"affectedPackagesSource":null,"affectedPackagesCheckedAt":null,"patchAvailable":null,"disclosureDate":"2025-07-29T13:17:16.000Z","fixReleasedAt":null,"daysToFix":null,"fixCheckedAt":null,"capecIds":null,"crossRefCount":0,"attackSophistication":"advanced","impactType":["confidentiality","integrity"],"aiComponentTargeted":"api","llmSpecific":false,"classifierConfidence":0.95,"researchCategory":"peer_reviewed","atlasIds":null}}