# Re: How long to crack a five, six, and seven digit passphrase in WinZip, WinRar, 7-Zip?

*From*: cryptosms@xxxxxxxxx*Date*: Wed, 16 Apr 2008 23:12:41 -0700 (PDT)

raylopez99 wrote:

I have a FAQ: using today's AES-256 commercial programs like WinZip,

WinRAR, 7-Zip, etc, how long will it take to crack an encrypted file

that uses an alphanumeric (ASCII) passphrase, using a commercial

processor (Pentium multi-core machine)? Assuming N=5...7 digits.

I recall a few years ago a five digit password took less than an hour

to crack, while a six digit passphrase took almost a day, and the

like.

Not on a supercomputer, but if you don't have stats for a normal PC

I'd be curious about a supercomputer as well.

RL

Here's a calculator for estimating brute force time, given the type of

password,

and the number of passwords that can be checked per second:

http://lastbit.com/pswcalc.asp

.

**References**:

- Prev by Date:
**Best Fake Casio Protrek Watches***- Casio Watches** - Next by Date:
**Re: my KDF vs dictionary attacks** - Previous by thread:
**How long to crack a five, six, and seven digit passphrase in WinZip, WinRar, 7-Zip?** - Next by thread:
**Re: How long to crack a five, six, and seven digit passphrase in WinZip, WinRar, 7-Zip?** - Index(es):