Biham-DES is a block cipher designed for secure data encryption. It operates on 64-bit blocks and uses a key size of 56 bits. The algorithm is based on a simple structure that combines substitution and permutation operations, making it efficient for various applications. The design of Biham-DES is inspired by the well-known Data Encryption Standard (DES). It aims to provide a similar level of security while being easier to implement. The cipher is particularly notable for its use in cryptographic research and educational purposes, helping to illustrate fundamental concepts in encryption.