crypt
[password
]<
file
>
encryptedfile
Encrypt a file
to prevent unauthorized access. password
is
either a string of characters you choose or the flag -k, which
assigns the value of environment variable CRYPTKEY as the
password. The same password
is used to encrypt a file or to
decrypt an encrypted file. If no password is given, crypt
prompts for one. crypt is available only in the United States
(due to export restrictions).
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