crypt

crypt

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password

] 

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file

 

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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).