] < file
Encrypt a file
to prevent unauthorized access. password
is either a string of characters you choose or the option
, which assigns the value of the environment variable CRYPTKEY
) as the password. The same password
encrypts a file or decrypts an encrypted file. If no password is given, crypt
prompts for one. crypt
is available only in the United States (due to export restrictions).
The algorithm used is considered weak, and this command should not be used for serious encryption. See PGP: Pretty Good Privacy
, listed in the Bibliography.