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Identifying Unknown Encryption Up for a challenge?

#1 User is offline biggestsonicfan 

Posted 16 December 2012 - 01:06 AM

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I have 3 files.

A zip, a supposed fix'd zip of the previous file, and a rar.

All three are unopenable and have no header data.

All three were obtained from Japanese file sharing sites.

All three are supposed to contain the same contents.

The contents should be approximately 20 image files, format unknown.

What would be the best way about going about trying to decrypt these files?
This post has been edited by biggestsonicfan: 16 December 2012 - 01:43 AM

#2 User is offline Andlabs 

Posted 16 December 2012 - 01:20 AM

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You linked the first zip file twice and linked the second zip instead of the RAR.

How are these files supposed to be acquired?

#3 User is offline biggestsonicfan 

Posted 16 December 2012 - 01:43 AM

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View PostAndlabs, on 16 December 2012 - 01:20 AM, said:

You linked the first zip file twice and linked the second zip instead of the RAR.

How are these files supposed to be acquired?

Whoops, fixed! Thank you!

#4 User is offline Andlabs 

Posted 16 December 2012 - 01:31 PM

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How are these files supposed to be acquired in the proper way? That might give us a hint...

#5 User is offline biggestsonicfan 

Posted 16 December 2012 - 09:54 PM

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View PostAndlabs, on 16 December 2012 - 01:31 PM, said:

How are these files supposed to be acquired in the proper way? That might give us a hint...

I couldn't find them anywhere online. The RAR was obtained by using Perfect Dark and the two Zip files were downloaded with a paid account from http://www.nakido.com/

#6 User is offline Meat Miracle 

Posted 18 December 2012 - 03:13 PM

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Share and Perfect Dark does tend to have false junk files on them. The second file doesn't have any zip headers in it at all, nor any identifiable text in neither ascii or shiftjis or unicode. The other two have been deleted from mediafire.

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