![]() Total charset used matters a lot (combination of letters, numbers, symbols) So, when it comes to creating a strong password:ġ. Using a password with 8 characters isn't quite secure in any combination. A botnet though would probably manage to crack it in a few hours. We end up with a charset of 94 total characters.įor the same average pc, it would take now about 38 years to process all the combinations. Now let's take again a password with 8 characters but this time we'll use numbers, lowercase, uppercase and symbols (Ha%bL-sq). If we're talking about supercomputers or a botnet, then the time to crack it is reduced to a few milliseconds.ġ0 - the total of characters in the charset (in this case 0-9) It may seem a lot, but believe it or not, an average modern computer can process all these combinations (this is called a brute force attack) in about 1 minute. ![]() So for example, if you have a password of 8 characters in length and you only use numbers (let's say 45379821), then the formula to calculate the total possible combinations is 10^8 = 100.000.000 total possible password combinations. Basically, it is all reduced to the total possible combinations between the length of the password and the total characters of the used charset. In order to create a strong password, you need to understand first how the strength of a password is calculated and how it can be hacked. Stay away from passwords that have been blacklisted, these are the first passwords to be used in attacks. These are passwords that were publicly exposed after a data breach or listed in different reports as the most used passwords. We check the password against a list with blacklisted passwords. ![]() In our formulas, we only take into account the maximum possible combinations between the charset used and password length. Brute force attacks are used mostly as a last resort, as they can be very time-consuming. There are many types of brute force attacks, but the success is usually based on computing power (how many combinations can be processed in a specific timeframe ). A brute force attack is an equivalent of trying every possible combination until it finds the right password. We try to estimate the time needed to crack a password with brute force. For example, a 20 characters password like “11111111111111111111” which has 66.4 bits, will be considered stronger than “Vj7%mlA8!1” which has 65.7 bits. In practice, this is a very poor approach. There are many online password meters out there using password entropy as the only strength factor. ![]() Basically, the longer the password, the higher the entropy. The password entropy takes into consideration the maximum possible combinations between the character set used (lowercase, uppercase, numbers, symbols) and the length of the password. Password entropy it’s usually expressed in bits. It displays 5 statuses “Very Weak, Weak, Good, Strong and Very Strong” and it’s correlated with the percentage progress bar. The password complexity is calculated with a custom algorithm that takes into account many aspects like password length, type of characters used (lowercase, uppercase, numbers, symbols), repeated characters, sequential characters, etc. What this password tool calculates exactly: That’s why we decided to calculate the password strength by 4 different methods. Your password contains Sequential Symbols this password strength checkerĪs mentioned before, there is no official weighting system to calculate the strength of a password. ![]()
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