makekey man page on Ultrix

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makekey(8)							    makekey(8)

Name
       makekey - generate encryption key

Syntax
       /usr/lib/makekey

Description
       The  command improves the usefulness of encryption schemes depending on
       a key by increasing the amount of  time	required  to  search  the  key
       space.	It reads 10 bytes from its standard input, and writes 13 bytes
       on its standard output.	The output depends  on	the  input  in	a  way
       intended	 to be difficult to compute (that is, to require a substantial
       fraction of a second).

       The first eight input bytes (the input  key)  can  be  arbitrary	 ASCII
       characters.   The  last	two (the salt) are best chosen from the set of
       digits, uppercase and lowercase letters, the period (.), and the	 slash
       (/).   The  salt characters are repeated as the first two characters of
       the output.  The remaining 11 output characters	are  chosen  from  the
       same set as the salt and constitute the output key.

       The  transformation performed is essentially the following: the salt is
       used to select one of 4096 cryptographic	 machines  all	based  on  the
       National	 Bureau	 of Standards DES algorithm, but modified in 4096 dif‐
       ferent ways.  Using the input key as key, a constant string is fed into
       the  machine and recirculated a number of times.	 The 64 bits that come
       out are distributed into the 66 useful key bits in the result.

       The command is intended	for  programs  that  perform  encryption  (for
       instance, Usually input and output of will be pipes.

See Also
       ed(1)

								    makekey(8)
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