Every password generator tells you the password is "strong." Very few tell you how strong, or what...
Every password generator tells you the password is "strong." Very few tell you how strong, or what that actually means in practice.
The answer is entropy — measured in bits.
What entropy bits mean
Entropy is the number of equally likely possibilities an attacker has to try. The formula:
entropy = log2(pool_size ^ length) = length × log2(pool_size)
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If you've been using the same password forever, you need to hear this.
