Via Diehard test:

"C:\Program files\ENT>ent xored.bin

Entropy = 8.000000 bits per byte.

Optimum compression would reduce the size

of this 410820608 byte file by 0 percent.

Chi square distribution for 410820608 samples is 243.08, and randomly

would exceed this value 50.00 percent of the times.

Arithmetic mean value of data bytes is 127.5014 (127.5 = random).

Monte Carlo value for Pi is 3.141694679 (error 0.00 percent).

Serial correlation coefficient is -0.000020 (totally uncorrelated = 0.0).

C:\PROGRA~1\ENT>"