Yesterday I have published an article about password entropy.
Today I would like to discuss the entropy of a phrase based password.

Phrase Based Password

A phrase based password is a password assembled from several easy to remember and spell words, delimited by spaces.
As a result, such passwords are very [...]

A common and easy way to estimate the strength of a password is its entropy.
The entropy is given by \(H = L \log_2{N}\) where \(L\) is the length of the password and \(N\) is the size of the alphabet, and it is usually measured in bits.
The entropy measures the number of [...]