Hash Function
A hash function is a mathematical function that takes input data of any size and produces a fixed-size string of characters, known as a hash value or digest, which uniquely represents the input data. This concept is crucial in various fields, including Computer Science, Cryptography, and Data Storage. Hash functions are often used for Data Integrity, Authentication, and Encryption. They are also used in Database Indexing and Cache Systems to efficiently store and retrieve data. The properties of a good hash function include Determinism, Non-injectivity, and Fixed Output Size. Well-known hash functions include Dijkstra's algorithm and Dirac notation-inspired functions.