Testing the randomness

So, you don't trust your random number generator made by NSA anymore? First creating a big file of random data which later on would be the encrypted content:

dd if=/dev/urandom of=rand.dat bs=1024 count=1000000

will create 1GB of random data.

Then checking via rngtest:

 cat rand.dat | rngtest
 rngtest: starting FIPS tests...
 rngtest: entropy source exhausted!
 rngtest: bits received from input: 8192000000
 rngtest: FIPS 140-2 successes: 409226
 rngtest: FIPS 140-2 failures: 373
 rngtest: FIPS 140-2(2001-10-10) Monobit: 56
 rngtest: FIPS 140-2(2001-10-10) Poker: 27
 rngtest: FIPS 140-2(2001-10-10) Runs: 153
 rngtest: FIPS 140-2(2001-10-10) Long run: 138
 rngtest: FIPS 140-2(2001-10-10) Continuous run: 0
 rngtest: input channel speed: (min=2.070; avg=21.267; max=18.626)Gibits/s
 rngtest: FIPS tests speed: (min=113.533; avg=163.438; max=171.833)Mibits/s
 rngtest: Program run time: 48202690 microseconds

And at last checking via dieharder:

dieharder -g 201 -f rand.dat -a

Weblinks

• http://jastacry.org/article/testing-randomness