Est ce que votre password est sûr ?

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Tester la sécurité de votre password est un petit jeu marrant avec http://www.howsecureismypassword.net/

 

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En fait, le site indique le temps qu’il faut pour casser votre mot de passe en force brute.

L’explication est ici:

(number of possible characters to the power of length of the password) divided by calculations per second

Length of the password is nice and easy to work out: it's just the number of characters in your password. For example 'cat' has 3 characters and 'monkey' has 12.

"Monkey has 12?", you ask.

"No it doesn't", I reply, "It's got 6. You should probably learn to count."

Calculations per second is a bit more of a rough figure. On the site it's set to 10,000,000, which is an approximate number of passwords a regular computer might be able to try every second. But it's going to depend on the computer as well as what the password is for. A lot of sites and programs won't let you try more than three passwords in the space of ten minutes, which would render a brute force attack pretty useless.

Number of possible characters is a bit more complicated. For alphanumeric characters it's easy enough: there are 26 possible lowercase characters; uppercase adds another 26; digits add another 10. It gets a bit more tricky after that: there are well over a million other symbols that a computer is capable of putting into a text field – e.g. ?, ß, Й, 葉, ☯. Not all sites and programs can accept these in password fields and different hacking tools will try different non-alphanumeric characters.

Currently this site will only check against the 13 most common symbols in English:

! @ # $ % ^ , & * ? _ ~ -

Any other symbols will be ignored. That's not ideal, but I've not thought of a better system yet.

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