Random Oracle

Definition ∞ A Random Oracle is a theoretical construct used in cryptographic proofs that acts as an idealized source of truly random numbers. It is assumed to respond to any query with a uniformly random output, without any discernible pattern or predictability. While not a physical implementation, the Random Oracle Model simplifies the analysis of cryptographic protocols by abstracting away the complexities of real-world random number generation. It serves as a benchmark for assessing the security of cryptographic designs.
Context ∞ The concept of a Random Oracle is foundational in theoretical cryptography and is frequently invoked in the analysis of new cryptographic schemes and blockchain protocols. Discussions often revolve around the limitations of the Random Oracle Model and the practical challenges of constructing secure pseudorandom number generators. News that delves into the security proofs of complex cryptographic systems will often reference the assumptions made within the Random Oracle Model.