symmetric-key algorithm

A symmetric-key algorithm is a method of encrypting information using a single secret key for both locking (encrypting) and unlocking (decrypting) the data. Think of it like a private codebook shared between two parties; both need the same key to read or write messages securely. This method is efficient and widely used for data protection. However, the key must be kept secret and shared securely, because anyone with the key can access the information. Examples include AES (Advanced Encryption Standard), which is commonly used to secure data on the internet.