Hash Function

A hash function is a special process that takes input data—like a message or file—and transforms it into a fixed-length string of characters, called a hash. This process is designed to be fast, producing a unique output for different inputs, making it useful for verifying data integrity, storing passwords securely, and enabling quick data retrieval. Even a small change in the input results in a significantly different hash, which helps detect tampering or errors. Hash functions are fundamental in computer security and data management, ensuring information stays accurate and protected.