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    Thread: Which step am I missing - DES-OFB Key
Post: Which step am I missing - DES-OFB Key

I am trying to map out how you can recover the Encryption key from a DES-OFB cipher with a known plain text attack. As it stands I have the IV - 64 Bits, the Cipher - 64 bits and the original/plain...
MaxPower hashcat 10 12,918 02-08-2017, 09:02 AM
    Thread: Which step am I missing - DES-OFB Key
Post: RE: Which step am I missing - DES-OFB Key

atom Wrote: (02-08-2017, 11:54 AM) -- Can you please post example data trace (all 8 iterations). Like, whats the ct/pt with each iteration -- Thanks for replying, No Problem, so showing wi...
MaxPower hashcat 10 12,918 02-08-2017, 01:46 PM
    Thread: Which step am I missing - DES-OFB Key
Post: RE: Which step am I missing - DES-OFB Key

ccprime Wrote: (02-09-2017, 12:46 AM) -- XOR is not supported by hashcat, i think -- Sorry if I made that hard to understand, the XOR is performed at the end of the encryption to obtain the cipher ...
MaxPower hashcat 10 12,918 02-09-2017, 01:18 AM
    Thread: Which step am I missing - DES-OFB Key
Post: RE: Which step am I missing - DES-OFB Key

Thanks atom, That was exactly to approach I had thought, because the key never changes, while there may be numerous keys that produce a C4 value with the IV, there will be a significantly smaller n...
MaxPower hashcat 10 12,918 02-09-2017, 09:49 PM
    Thread: Which step am I missing - DES-OFB Key
Post: RE: Which step am I missing - DES-OFB Key

Thanks for your help atom. I'll have a "crack" at it over the next few days.
MaxPower hashcat 10 12,918 02-11-2017, 02:17 AM
    Thread: DES-ECB: mask on plain text?
Post: RE: DES-ECB: mask on plain text?

1010 Wrote: (02-16-2017, 09:46 PM) -- atom Wrote: (02-16-2017, 09:32 PM) -- Yes, but we'd need to switch from encrypt to decrypt and then match out the bits you don't care about. So that's possible ...
MaxPower hashcat 4 5,872 02-17-2017, 01:53 AM
    Thread: Which step am I missing - DES-OFB Key
Post: RE: Which step am I missing - DES-OFB Key

Hi MattSR, Thanks for your input and extra info. I have PM'd you.
MaxPower hashcat 10 12,918 06-27-2017, 03:58 AM