## ENT test

Find false randomness (not a proof to true randomness)

- entropy
- compression
- chi-square
- arithmetic mean
- montecarlo estimation for PI
- serial correlation coefficient)

https://www.fourmilab.ch/random/

Example:
Entropy = 7.980627 bits per character.

```
Optimum compression would reduce the size
of this 51768 character file by 0 percent.
Chi square distribution for 51768 samples is 1542.26, and randomly
would exceed this value less than 0.01 percent of the times.
Arithmetic mean value of data bytes is 125.93 (127.5 = random).
Monte Carlo value for Pi is 3.169834647 (error 0.90 percent).
Serial correlation coefficient is 0.004249 (totally uncorrelated = 0.0).
```