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A challenge for the expert hackers. Encryption in Sega SP2's SONIC 2 ROM

#16 User is offline LOst 

Posted 31 December 2003 - 08:44 AM

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fuzzbuzz, on Dec 31 2003, 01:00 AM, said:

Damn! you beat me! I shouldn't have spent the morning playing SADX:PC! :P

EDIT: If I may ask, what encryption was it exactly? Was there a needed key?


Fuzbuzz

Encryption key? No, I haven't even touched the kvq file. I let the program decrypt it for me :P

#17 User is offline Guess Who 

Posted 31 December 2003 - 12:47 PM

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Which program? I use WinHex to look at hex and so forth, and it has no option to decrypt.

#18 User is offline fuzzbuzz 

Posted 31 December 2003 - 01:02 PM

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I think he meant Smash Pack 2, and did a memory dump. However, I'm still curious what encryption it was....I still have something to do! :P

Though, I'd still rather play SADX PC. What fun.



Fuzzbuzz

#19 User is offline Guess Who 

Posted 31 December 2003 - 01:33 PM

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It takes forever to download SADX PC for me... wah. Not only that, I don't have 3d support on my PC.... wah wah wah wah! *shot* *shot* *shot* *shot*





*shot*

#20 User is offline fuzzbuzz 

Posted 31 December 2003 - 01:44 PM

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If you wanna DL it: use my ftp "server":

ftp://scarz:[email protected]/


Fuzzbuzz

#21 User is offline LOst 

Posted 31 December 2003 - 02:56 PM

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guess_who, on Dec 31 2003, 08:47 PM, said:

Which program? I use WinHex to look at hex and so forth, and it has no option to decrypt.

WinHex

#22 User is offline Guess Who 

Posted 31 December 2003 - 03:40 PM

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DOH. In my WinHEX, it requires a encryption key.
This post has been edited by guess_who: 31 December 2003 - 03:42 PM

#23 User is offline Guess Who 

Posted 31 December 2003 - 03:44 PM

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fuzzbuzz, on Dec 31 2003, 01:44 PM, said:

If you wanna DL it: use my ftp "server":

ftp://scarz:[email protected]/


Fuzzbuzz

It still won't work, I can't play games with 3d models on this piece of...

#24 User is offline fuzzbuzz 

Posted 31 December 2003 - 03:50 PM

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Ah. I see, too bad. You should buy a 3d card. It's a really fun game, course, I've never played it before, this was my first time. It may be boring to other people that have played other 3d Sonic Games..

Fuzzbuzz

#25 User is offline Guess Who 

Posted 31 December 2003 - 04:08 PM

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I'm content with playing it on my Gamecube. But I still wanna know the encryption key!

#26 User is offline Guess Who 

Posted 31 December 2003 - 09:53 PM

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I want my friggin' encryption key!

#27 User is offline Hivebrain 

Posted 31 December 2003 - 11:06 PM

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LOst, that ROM you posted is only half there. What happened to the data after 0x80000 ?

#28 User is offline Quickman 

Posted 31 December 2003 - 11:28 PM

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I got a file which went right up to $1FFFFFF, so you must have a duff download.

Anyway, analysis of it in a hex editor (since after the checksum is fixed it just gives me a black screen) seems to indicate it's exactly the same as the final.

#29 User is offline fuzzbuzz 

Posted 01 January 2004 - 01:32 AM

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I compared it to the final, and found spread data, either exclusive to LOst's or exclusive to the Final. I have a picture, but it's on my other computer...


Fuzzbuzz

#30 User is offline LOst 

Posted 01 January 2004 - 12:29 PM

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Hivebrain, on Jan 1 2004, 07:06 AM, said:

LOst, that ROM you posted is only half there. What happened to the data after 0x80000 ?

The emulator must have deleted it after the decryption :)
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