Plaintext Posted on December 22, 2019December 22, 2019 by Ty Mezquita Cryptography protects data confidentiality and integrity but not necessarily availability when done correctly. Plaintext is unencrypted information. Plaintext is the precursor to ciphertext. It is also the output of decrypting of an encrypted message. Related Term: Ciphertext, Cryptography, Encryption Source: CNSSI 4009 Share this on your social networks. Help Friends, Family, and Colleagues become more aware and secure.