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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... |
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MaxPower |
hashcat
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12,924 |
02-08-2017, 09:02 AM |
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Thread: Which step am I missing - DES-OFB Key
Post: RE: Which step am I missing - DES-OFB Key
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atom Wrote: (02-08-2017, 11:54 AM)
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Can you please post example data trace (all 8 iterations). Like, whats the ct/pt with each iteration
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Thanks for replying,
No Problem, so showing wi... |
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MaxPower |
hashcat
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10 |
12,924 |
02-08-2017, 01:46 PM |
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Thread: Which step am I missing - DES-OFB Key
Post: RE: Which step am I missing - DES-OFB Key
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ccprime Wrote: (02-09-2017, 12:46 AM)
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XOR is not supported by hashcat, i think
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Sorry if I made that hard to understand, the XOR is performed at the end of the encryption to obtain the cipher ... |
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MaxPower |
hashcat
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10 |
12,924 |
02-09-2017, 01:18 AM |
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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... |
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MaxPower |
hashcat
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10 |
12,924 |
02-09-2017, 09:49 PM |
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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. |
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MaxPower |
hashcat
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10 |
12,924 |
02-11-2017, 02:17 AM |
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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. |
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MaxPower |
hashcat
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10 |
12,924 |
06-27-2017, 03:58 AM |
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Thread: DES-ECB: mask on plain text?
Post: RE: DES-ECB: mask on plain text?
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1010 Wrote: (02-16-2017, 09:46 PM)
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atom Wrote: (02-16-2017, 09:32 PM)
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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 ... |
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MaxPower |
hashcat
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4 |
5,875 |
02-17-2017, 01:53 AM |
