Author Topic: Tech.jpg  (Read 44766 times)

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Offline gmalivuk

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Re: Tech.jpg
« Reply #645 on: February 24, 2020, 11:23:13 am »


According to the person who shared it on Facebook, this was current as of DEFCON in August.
« Last Edit: February 26, 2020, 06:26:38 pm by gmalivuk »
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Offline John Albert

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Re: Tech.jpg
« Reply #646 on: February 24, 2020, 03:47:44 pm »
What is the "speed" column for?

Offline gmalivuk

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Re: Tech.jpg
« Reply #647 on: February 24, 2020, 04:29:52 pm »
The speed of testing that type of hash.

If a website's data leaks, it's (hopefully) not storing your password in plain text but as a hash (a type of mathematical function that's easy to compute and hard to reverse). To check a possible password, you apply the hash function to it and then see if the result shows up in the stolen data.

Some hash functions are much faster to compute and others much slower, so this shows the number of hashes per second that can be computed in this setup (which if I'm reading correctly is a parallel arrangement of 480 GPUs).

Windows, at least in old versions (or when it needs to be compatible with old versions) used NTLM, which evidently can be attacked particularly quickly. If a bunch of hashes from KeePass are leaked, on the other hand, they can only be checked at about a millionth of the speed, so the same complexity of password would last a million times longer before being cracked.
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Offline gmalivuk

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Re: Tech.jpg
« Reply #648 on: February 24, 2020, 04:35:34 pm »
The one password I have to remember that might be vulnerable to this sort of thing is the one I use for LastPass (as most of the rest are randomly generated strings of 16 or more characters, which won't be cracked by anything in my lifetime short of strong quantum computing). The hash LastPass uses is there in the middle, and so I can see that I'd want to use something at least as strong as a random 10-character upper+lower+number+symbol password to protect that securely.
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Offline John Albert

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Re: Tech.jpg
« Reply #649 on: February 24, 2020, 05:36:24 pm »
I work in programming and understand how hashing and other forms of cryptography work.

What I'm asking is, what does that column denote? Are they using different levels of computing power to brute force each type of crypt?

Offline gmalivuk

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Re: Tech.jpg
« Reply #650 on: February 24, 2020, 06:30:42 pm »
I took it to mean that's how fast they could calculate each type of hash with the (constant) amount of computing power they had.
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Offline Soldier of FORTRAN

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Re: Tech.jpg
« Reply #651 on: February 24, 2020, 06:33:08 pm »
Looks like hashes per second given the set-up described in the title.
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Offline gmalivuk

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Re: Tech.jpg
« Reply #652 on: February 24, 2020, 06:44:40 pm »
Looks like hashes per second given the set-up described in the title.
Right. From 31 trillion per second down to about 3 million.
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Online Noisy Rhysling

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Re: Tech.jpg
« Reply #653 on: February 25, 2020, 11:30:19 am »
I took it to mean that's how fast they could calculate each type of hash with the (constant) amount of computing power they had.
If you need someone to test hash I have some experience in that area.
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Offline gmalivuk

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Re: Tech.jpg
« Reply #654 on: February 25, 2020, 01:41:08 pm »
Hashes can have salt and pepper applied, so I think they're referring more to the kind you eat after you smoke the other kind.
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Online Noisy Rhysling

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Re: Tech.jpg
« Reply #655 on: February 25, 2020, 02:17:37 pm »
Hashes can have salt and pepper applied, so I think they're referring more to the kind you eat after you smoke the other kind.
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Offline mindme

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Re: Tech.jpg
« Reply #656 on: March 02, 2020, 11:21:44 am »
https://i.imgur.com/g2aypEa.jpg

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« Last Edit: March 02, 2020, 11:23:49 am by mindme »
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Offline mindme

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Re: Tech.jpg
« Reply #657 on: March 03, 2020, 07:58:33 am »
https://i.imgur.com/8ma0Uk8.jpg

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Offline John Albert

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Re: Tech.jpg
« Reply #658 on: March 03, 2020, 09:38:30 am »
Anybody remember Cat-Scan.com?

Offline arthwollipot

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Re: Tech.jpg
« Reply #659 on: March 03, 2020, 05:05:43 pm »
Self-described nerd.