Decryption transforms ciphertextCiphertext is encrypted text that requires a decryption key to read. Converting ciphertext into readable plaintext requires the appropriate key... Read More to reveal the original plaintextPlaintext is the data that a computer system processes without encryption. Plaintext typically takes the form of characters, numbers, or... Read More. EncryptionEncryption is the process of encoding an original form of information called plaintext using an algorithm called a cipher. The... Read More is the reverse process to decryption.