The first recorded use of this cryptographic technique dates back to ancient Greece.
The name of the first cipher machine used for encryption and decryption.
A cryptographic algorithm that uses the same key for both encryption and decryption.
A type of cryptography that involves the use of a pair of keys, one public and one private.
A system of encryption and decryption based on the use of a secret key.
The name of the first publicly available encryption software.
The process of converting plaintext into ciphertext.
A cryptographic technique that involves the substitution of one letter or symbol for another.
A cryptographic technique that involves the shifting of letters or symbols by a fixed number of positions.
A type of encryption that involves the use of a stream of random numbers to generate the ciphertext.