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Need help with an algorithm

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Need help with an algorithm Software design forum discussing design principles and non-language specific algorithms. Get help with logic, algebraic, or relational concepts.

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Old September 28th, 2003, 09:54 PM
The Highlander The Highlander is offline
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Need help with an algorithm
I am trying to unlock a GM PCM... The computer is unlocked via a seed/key protocol... the computer sends you a seed (user ID) and you send the key (corresponding password)

I need to know the corresponding algorithm for theese Hexadecimal numbers.. anyone care to help??

seed 2590, key 0328
seed 4470, key 2309
seed 136A, key 293A

I also have another one, but unsure if it has the same algorithm as the first seeds and keys...
seed 5bb7, key dbf2

It looks like an XOR encryption or something.. anyone can help or provide a tool to decrypt this??

Thanks
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Old September 29th, 2003, 04:58 PM
The Highlander The Highlander is offline
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It looks to be a CRC-16 checksum generation but how do I check the polinomial and starting value??

Is there a program that will generate this?? Thanks
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Old October 1st, 2003, 08:10 AM
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Quote:
Need help with an algorithm
We can assume that simpliy because this *is the Algorithms forum. Please try to post with a meaningful title.

As for working out the encryption method between a bunch of hexadecimal pairs, other than writing a PERL script to try some of the more obvious possibilities, what you're asking for is probably not humanly possible. Unless I have totally misunderstood the point here.

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