Workfactor

Denotes the average number of attepts needed to guess a secret.

$$WF(X)=\sum _{k=1}^{n}k{p}_k$$

Work factor in bits

$$\frac{\log (WF)}{\log 2}$$

## How long does it take to break a key

$$t=\frac{WF}{\text{cpu freq}\times \text{cycles per byte}}$$