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Thread: Agilebits 1Password support and Design Flaw?
Post: RE: Agilebits 1Password support and Design Flaw?
| Blog post on this on the AgileBits blog.
And let me thank everyone here for your help in helping me clear up my own misunderstandings.
http://blog.agilebits.com/2013/04/16/1password-hashcat-st... |
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jpgoldberg |
Very old oclHashcat-plus Support
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44 |
479,133 |
04-18-2013, 01:24 AM |
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Thread: Agilebits 1Password support and Design Flaw?
Post: RE: Agilebits 1Password support and Design Flaw?
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atom Wrote: (04-16-2013, 04:46 PM)
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The PBKDF2-HMAC-SHA1 part is what makes the entire calculation slow. For each iteration of PBKDF2-HMAC-SHA1 you call 4 times the SHA1 transform. But this is only... |
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jpgoldberg |
Very old oclHashcat-plus Support
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44 |
479,133 |
04-17-2013, 05:41 AM |
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Thread: Agilebits 1Password support and Design Flaw?
Post: RE: Agilebits 1Password support and Design Flaw?
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epixoip Wrote: (04-16-2013, 11:12 PM)
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no, that's only half the issue.
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Right.
I'm sorry if I'm being dense. I see "half" of the issue being a general PBKDF2 issue that isn't specific to the A... |
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jpgoldberg |
Very old oclHashcat-plus Support
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44 |
479,133 |
04-17-2013, 02:53 AM |
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Thread: Agilebits 1Password support and Design Flaw?
Post: RE: Agilebits 1Password support and Design Flaw?
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quinndupont Wrote: (04-17-2013, 12:09 AM)
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If I have the math right (and damn, I probably don't), we're still looking at 10^27 years of cracking to exhaust the combinatoric space, right?
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Remembe... |
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jpgoldberg |
Very old oclHashcat-plus Support
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44 |
479,133 |
04-17-2013, 02:44 AM |
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Thread: Agilebits 1Password support and Design Flaw?
Post: RE: Agilebits 1Password support and Design Flaw?
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epixoip Wrote: (04-16-2013, 10:45 PM)
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a lot of the sha1 optimizations do not apply for hmac-sha1. the remarkable speeds come from cutting the total number of transforms required by 75%. defenders ... |
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jpgoldberg |
Very old oclHashcat-plus Support
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44 |
479,133 |
04-16-2013, 11:06 PM |
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Thread: Agilebits 1Password support and Design Flaw?
Post: RE: Agilebits 1Password support and Design Flaw?
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jpgoldberg Wrote: (04-16-2013, 06:24 PM)
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I don't want to quibble about the meaning of the word "flaw",
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With the help of time and discussions on Twitter, I see that yes there is a design flaw in... |
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jpgoldberg |
Very old oclHashcat-plus Support
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44 |
479,133 |
04-16-2013, 09:58 PM |
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Thread: Agilebits 1Password support and Design Flaw?
Post: RE: Agilebits 1Password support and Design Flaw?
| I'm guessing that my earlier statements about John the Ripper crack rates was off by 100. I took "c/s" to mean "cracks per second" (I couldn't figure out what "c" was), but I'm guessing now that that ... |
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jpgoldberg |
Very old oclHashcat-plus Support
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44 |
479,133 |
04-16-2013, 08:12 PM |
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Thread: Agilebits 1Password support and Design Flaw?
Post: RE: Agilebits 1Password support and Design Flaw?
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atom Wrote: (04-16-2013, 06:40 PM)
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The speed is not 3.000 keys per second. It's 3.000.000 keys per second.
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I guess congratulations are in order, but I hope you under stand that I was really rea... |
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jpgoldberg |
Very old oclHashcat-plus Support
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44 |
479,133 |
04-16-2013, 06:48 PM |
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Thread: Agilebits 1Password support and Design Flaw?
Post: RE: Agilebits 1Password support and Design Flaw?
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jpgoldberg Wrote: (04-16-2013, 05:28 PM)
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This design flaw is certainly real, [...]
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I don't want to quibble about the meaning of the word "flaw", so I'll try to summarize the key points in my ... |
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jpgoldberg |
Very old oclHashcat-plus Support
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44 |
479,133 |
04-16-2013, 06:24 PM |
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Thread: Agilebits 1Password support and Design Flaw?
Post: RE: Agilebits 1Password support and Design Flaw?
| I don't have a lot of experience reading hashcat output, could someone confirm that
Code:
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Speed.GPU.#1...: 744.0k/s
Speed.GPU.#2...: 744.0k/s
Speed.GPU.#3...: 743.9k/s
Speed.GPU.#4...: 743... |
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jpgoldberg |
Very old oclHashcat-plus Support
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44 |
479,133 |
04-16-2013, 06:03 PM |
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Thread: Agilebits 1Password support and Design Flaw?
Post: RE: Agilebits 1Password support and Design Flaw?
| [Disclosure: I work for AgileBits, the makers of 1Password]
This design flaw is certainly real, and is one of the many reasons why we have started migrating to a new design. In short, when the Agil... |
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jpgoldberg |
Very old oclHashcat-plus Support
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44 |
479,133 |
04-16-2013, 05:28 PM |
