32 lines
1.6 KiB
Markdown
32 lines
1.6 KiB
Markdown
# Password-Entropy-Calculator
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Built off of <a href="https://github.com/tests-always-included/password-strength" target="_blank">tests-always-included/password-strength</a>
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This Calculates the relative strength of a password using several techniques. Primarily this relies on letter trigraphs, which check each set of 3 characters in a given password. This also calculates the entropy bits based on Claude Shannon's technique on determining the number of bits required to represent a set of characters and multiplying it by the length of the password and there's a check to see if a password is contained in a list of common passwords and as a bonus there's also a "Search Space" or (Total Possible Combinations) Calculator, inspired by <a href="https://www.grc.com/haystack.htm" target="_blank">GRC's Interactive Brute Force Password “Search Space” Calculator.</a>
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You can toggle between the normal algorithm and GRC's algorithm.
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The normal algorithm is:
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```javascript
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Math.pow(number-of-characters, Password-length);
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```
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and a symbol character set size of 32.
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GRC's algorithm is:
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```javascript
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function GRC(Password-length)
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{
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if(Password-length < 1)
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{
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return 0 ;
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}
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if (Password-length == 1)
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{
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return Math.pow(number-of-characters, Password-length);
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}
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return Math.pow(number-of-characters, Password-length - 1) + GRC(Password-length - 1);
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}
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```
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and a symbol character set size of 32.
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Format: 
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