Account collusion in multi-tenant RAG raises retrieval leakage to Θ(√k ε_acc) under Gaussian noise-then-select; the work supplies a matching attack and a verifier-runnable audit protocol for coalitions up to k_max.
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Auditing Privacy in Multi-Tenant RAG under Account Collusion
Account collusion in multi-tenant RAG raises retrieval leakage to Θ(√k ε_acc) under Gaussian noise-then-select; the work supplies a matching attack and a verifier-runnable audit protocol for coalitions up to k_max.