Entropy is the scientific metric used by cryptographers to quantify the unpredictability of a password string. A password with high entropy is mathematically impervious to brute-force discovery.
Understanding Bits of Entropy
Each character added from a larger character pool (uppercase, lowercase, digits, and punctuation) exponentially increases the total number of permutations an adversary must evaluate.
Why Length Trumps Complexity
A 20-character passphrase composed of random words yields significantly higher entropy than an 8-character password stuffed with complex symbols, while remaining easier to memorize.
