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decrypting a file using shell script

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# 1  
Old 11-28-2004
decrypting a file using shell script
how do you go about doing this i have a shell script here below but i am not to sure on the process of decrytpting the file.

#!/bin/csh
#
#
set am = ‘abcdefghijklm'
set am = ‘ABCDEFGHIJKLM'
set nz = ‘nopqrstuvwxyz'
set NZ = ‘NOPQRSTUVWXYZ'
cat $argv[1] | tr $am $AM | tr $NZ $nz | tr $nz $am > new$argv[1]


I have writed this so far. I know you have to use a command at the promt called crypt but then i am lost help!!!!
# 2  
Old 11-30-2004
No more homework posting.

Your status has been changed to read only.

Neo
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