[stella] Atari 7800 checksum algorithm

Subject: [stella] Atari 7800 checksum algorithm
From: Paul Hart <hart@xxxxxxxxxxx>
Date: Tue, 8 Dec 1998 16:36:47 -0700 (MST)
As I was thinking about how to subvert the digital signature algorithm in
the Atari 7800, I thought of another possible avenue of attack.  What
hashing algorithm does the 7800 use when calculating the checksum of the
cartridge data to compare it to the encrypted hash upon decryption?  Could
it be possible to take an existing signature (encrypted hash) from a real
cartridge and doctor up a different cartridge so as to have an identical
hash?  If the hashing algorithm is not cryptographically secure, it may
very well be possible to do?so. 

Paul Hart

Paul Robert Hart        ><8>  ><8>  ><8>        Verio Web Hosting, Inc.
hart@xxxxxxxxxxx        ><8>  ><8>  ><8>        http://www.iserver.com/

Archives (includes files) at http://www.biglist.com/lists/stella/archives/
Unsub & more at http://www.biglist.com/lists/stella/

Current Thread