Advanced Infrastructure Penetration Testing

Cryptosystems

The implementation of cryptographic techniques is called a cryptosystem; sometimes it's called a cipher system. The following diagram describes a simple cryptosystem. The sender encrypts the plaintext with an encryption algorithm, which is a mathematical process using an encryption key. The output of that operation generates a ciphertext that will be decrypted by the receiver, using a decryption algorithm and a decryption key, so the ciphertext will be readable as plaintext: