Pseudorandom Function

Definition ∞ A Pseudorandom Function is a deterministic algorithm that produces outputs which are computationally indistinguishable from truly random values, given a secret key. While its output appears random, it is generated by a specific mathematical process. These functions are fundamental building blocks in cryptography, used for tasks like key derivation, message authentication, and constructing secure systems. They are a core element of modern security protocols.
Context ∞ Pseudorandom Functions are extensively utilized in blockchain technology for various cryptographic operations, including address generation and commitment schemes. Discussions often center on the security assumptions underlying these functions and their resistance to advanced cryptanalytic techniques. The ongoing development of new, quantum-resistant pseudorandom functions is a critical area for future blockchain security.