His analysis pursuits are in making use of program evaluation methods from academia to resolve practical reverse engineering problems. His pursuits revolve round learn how to conduct massive scale fuzzing campaigns and learn how to automate as a lot of this as doable. Mine was set to 1. I don't know how/why it is 1 as a result of I by no means modified it." Well, there's why. "Evidently, I have downloaded and put in Bitwarden, and I'm changing the password on every site in my vault as rapidly as I can." So, yes, Dave has the right thought. He was typical of many of our listeners. And there's an instance from amongst lots of what our listeners discovered to their horror last week; and, sadly, it is perhaps because he by no means changed it that it remained set to 1. As you stated, Leo, the most loyal early adopters of LastPass, they're those who're, in a phrase, effed. As we all know, he should not have had to vary it. That should by no means have been his accountability. But we're on the skin right here, looking in. We have no idea of the true story behind this iteration fiasco. But there isn't a approach to forgive this from LastPass. None. This is greater than a mistake. This needed to be somebody's boneheaded determination. With their acknowledgement of the importance of accelerating the iteration rely over time, evidenced by its default being jumped from 1 to 500 to 5000 to 100,100, somebody must have made the decision to not trouble bringing older current iteration counts into compliance with present greatest practices. Someone will need to have determined that it will, I don't know, lead to an excessive amount of buyer confusion and support calls, so let's just go away it wherever it is. And the galling factor is it might have been accomplished 100% transparently. I am no smarter than their crypto folks. So that they know this, too. When the consumer supplies their email handle and password to log into their consumer, at that second the shopper has the whole lot it needs to perform the upgrade transparently. Start iterating on PBKDF2. Pause at the present iteration count and take a snapshot of the current key at that point. Then keep going to the new bigger iteration rely and take a snapshot of that new key. Now decrypt the vault with the current key, which was sampled midstream, then reencrypt the vault with the bigger closing iteration depend key. And, lastly, replace the stored iteration count. Done. Totally clear. No user confusion. And a company as big as LastPass, now focused on the enterprise and all the things, for reasons I am unable to possibly clarify, never did that. I imply, not only is just not all people at 100,100, there are people at 5000 and 500. There are folks at 1. And change your passwords. Okay. David Lemire. He said: "Hi, Steve.
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Someone in a local Java User Group may know one thing. Combining an unpredictable iteration count with salting the hashing course of should raise the work issue for the creation of rainbow tables, as effectively because the comparison course of, by a considerable issue." Okay. Now, I did not imply to confuse issues last week with my mention of the possibility of attacking known salt-free hashing schemes with precomputation attacks. My intention was to paint a historical past to remind us of where we've been and how we obtained to where we're in the present day. Everyone has all the time been protected from precomputation assaults by the inclusion of their e mail deal with because the salt for the PBKDF2 perform. Joe Siegrist was doing this from day one, with an iteration count of 1. Unfortunately, again in 2008, Joe was, as I mentioned, additionally iterating only once by PBKDF2. And as we now know, for some unlucky souls, that for no matter cause was never changed. Someone can also be more likely to ask if a consumer deliberately set their iteration count to 1, what would occur in the event that they didn't perceive what that was about? You understand, like what if that occurred? My answer to that would be that it should absolutely by no means have been allowed. LastPass would certainly not enable any user to leave their password blank. A low iteration depend is successfully no different. LastPass was lifting the count over time, and that ought to have always been the minimum that any LastPass consumer shopper would settle for as its count. I received a query by way of e mail: "Hello.
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