Multimedia - Cryptology - Cryptanalysis - - Arabic - Video 6

Plaintext ciphertext - coded message ➢ cipher - algorithm for transforming plaintext to ciphertext ➢ key - info used in cipher known only to sender/receive r ➢ encipher (encrypt) - converting plaintext to ciphertext ➢ decipher (decrypt) - recovering plaintext from ciphertext ➢ cryptography - study of encryption principles/methods ➢ cryptanalysis (codebreaking) - study of principles/ methods of deciphering ciphertext without knowing key ➢ cryptology