Introduction
The online testing we provide is derived (adapted) from the NIST
statistical suite for random number generator. For practical
and theoretical description of the tests , the reader should consult
the NIST report.
The minimum size of the sequence we analyze is 1 Mbyte and up to 256 Mbytes. Those tests were not originally written for analyzing such huge sequences of random numbers. Therefore, some performance gaps were encountered. Many tests were too CPU hungry and memory hungry to be run in a reasonable time ( a few minutes for 1 Mbyte). We adapted those tests to run faster and with using less memory when possible. When despites our efforts, the response time was still too large, we run the test on a few "randomly" chosen subsequences.
We describe our usage of each of the tests.
Test 1 (Frequency test ), Test 2
(Block Frequency test ), Test 3 (Runs test), Test 14 ( Cumulative Sums)
Each of these tests are run on randomly selected subsequences
for each of the size 128 bits, 256 bits, .. up to the complete
sequence.
Test 4 (Longest runs tests)
We chose to 8 runs on randomly chosen 750000 bits sequences.
Test 5: Binary matrix rank test
This test is very CPU hungry. We chose to run it on only
8 randomly selected 38,192 bits sequences.
and Test 4 (Longest runs tests)