![]() ![]() Where P = plaintext, C = ciphertext, E = the encryption method, D = the decryption method, and k = the key. For those who like formulas, this process is sometimes written as: The encryption and decryption is based upon the type of cryptography scheme being employed and some form of key. Plaintext is encrypted into ciphertext, which will in turn (usually) be decrypted back into usable plaintext. In cryptography, we start with the unencrypted data, referred to as plaintext.
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