Ok, without computer.
I have a sentence with numbers like (let's forget about hex):
50 40 30 12 8 4 2
I know this is some for of an encrypted message, and to get the message decoded every number must be substracted the next one from it: 
50 - 40 = 10 
40 - 30 = 10
30 - 12 = 18
12 - 8 = 4
8 - 4 = 4
4 - 2 = 2
2 - 0 = 2

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So my result, my decoded sentence would be:
10 10 18 4 4 2 2

In reply to Re^4: Perl hex substraction by inkubus
in thread Perl hex substraction by inkubus

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