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Brute-Force Password Cracking with GPUs

Anonymous Coward writes | more than 3 years ago

AMD 3

An anonymous reader writes "We all know that brute-force attacks with a CPU are slow, but GPUs are another store. Tom's Hardware has an interesting article up on WinZip and WinRAR encryption strength, where they attempt to crack passwords with Nvidia and AMD graphic cards. Some of their results are really fast, like in the billions of passwords per second, and that's only with two GTX 570s!"
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3 comments

CPU vs GPU (1)

wintertargeter (2012914) | more than 3 years ago | (#36497082)

Interesting article, but I wonder if CPUs are only slower at brute-force attacks because there haven't been new optimized programs.

Re:CPU vs GPU (0)

Anonymous Coward | more than 3 years ago | (#36497156)

Interesting article, but I wonder if CPUs are only slower at brute-force attacks because there haven't been new optimized programs.

I don't think its just about optimizing the algorithm. GPUs are meant for doing the same task over and over again (http://bit.ly/mkltyA). Thus, search algorithms where multiple terms can be tried concurrently will always be faster on the GPUs.

Re:CPU vs GPU (1)

wintertargeter (2012914) | more than 3 years ago | (#36497234)

but isn't every new password that you're trying technically different?
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