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Encryption Hardware Technology

Brute-Force Password Cracking With GPUs 128

An anonymous reader writes "We all know that brute-force attacks with a CPU are slow, but GPUs are another story. 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 — in the billions of passwords per second — and that's only with two GTX 570s!"
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Brute-Force Password Cracking With GPUs

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  • by mlts ( 1038732 ) * on Monday June 20, 2011 @02:37PM (#36503820)

    WinZIP and WinRAR have effective encryption, but one needs to have an effective passphrase with it.

    Ideally, the best way to encrypt stuff is with not just a passphrase, either with random keyfile for symmetric encryption, or use public key crypto (although PK crypto has its own caveats). This way, there is no brute-forcable passphrase to guess, so an attacker has to deal with the complete keyspace of an encryption algorithm, and not just what people type in.

Nothing is finished until the paperwork is done.