FrodoPIR: Simple, Scalable, Single-Server Private Information Retrieval

We design FrodoPIR — a highly configurable, stateful, single-server Private Information Retrieval (PIR) scheme that involves an offline phase is completely client-independent. Coupled with small online overheads, it leads to much smaller amortized financial costs on the server-side than previous approaches. In terms of performance for database 1 million 1KB elements, requires < second responding client query, has server response size blow-up factor 3.6x, and are ~$1 answering 100,000 queries. Our experimental analysis built upon simple, non-optimized Rust implementation, illustrating particularly suitable deployments involve large numbers clients.