makekey(1)
_________________________________________________________________
makekey Command
generate encryption key
_________________________________________________________________
SYNTAX
/usr/lib/makekey
DESCRIPTION
Makekey 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 (i.e., 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, ., /, and upper and lowercase letters. 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 4,096 cryptographic machines all
based on the National Bureau of Standards DES algorithm, but
broken in 4,096 different 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
output key bits in the result.
Makekey is intended for programs that perform encryption (e.g.,
ed(1) and crypt(1)). Usually, its input and output will be
pipes.
_________________________________________________________________
EXAMPLES
$ /usr/lib/makekey < inkey > outkey
The 10 character input key in file "inkey" is encrypted and
placed in file "outkey".
_________________________________________________________________
DG/UX 4.00 Page 1
Licensed material--property of copyright holder(s)
makekey(1)
SEE ALSO
crypt(1), ed(1).
passwd(4) in the Programmer's Reference for the DG/UX System
DG/UX 4.00 Page 2
Licensed material--property of copyright holder(s)