I tried t check the randomness of the chaotic sequence generated by the chaotic logistic-sine coupling map by the NIST test but in that code, it takes input in binary numbers(0&1)
so for this, we have to convert our chaotic sequence in 0 &1 by some threshold value firstly I calculate the sequence and then take their median and make this as a threshold value so if the chaotic sequence value > threshold value then it gives 1 and else 0 and stores this into a new binary sequence and sends this as an input in the tests but in that code, it repeats all the test 100 times and takes the average of results at each stage.
I tried it on a chaotic logistic-sine coupling map( 2D CLSM) map but the results were different as it mentioned by the author in the article. Anyone, please help me.
Vivek Verma The NIST test is a statistical test suite intended to assess the randomness of a chaotic sequence or encrypted picture. The test suite contains 15 statistical tests meant to discover patterns or non-randomness in the data.
In regards to your chaotic logistic-sine coupling map problem, utilizing a threshold value to turn the chaotic sequence into a binary sequence may not be the ideal strategy. Because the NIST test is intended to function with binary data, the threshold number you select may not be the most accurate depiction of the chaotic sequence.
Another option is to utilize the chaotic sequence directly, without transforming it to binary, and apply the NIST test on the raw data. This allows you to use the chaotic sequence's entire dynamic range rather than converting it to a binary form.
Another way is to employ various randomness tests, such as the dieharder, diehard, and ent tests, which are also available in open-source software and accept a broad range of data formats as input.
It's also crucial to remember that the NIST test is simply one method for determining the randomness of a chaotic sequence or encrypted picture, and it might not be the optimal test for your unique application. Before drawing any conclusions, it's usually a good idea to speak with specialists in the subject and compare the results to other tests.
But how can I take a chaotic sequence as input in the NIST test? While it takes a binary sequence as input. I read an article based on the NIST test suite in which the author used binary sequence as input and all the tests in this suite take a binary sequence as input. Please give me some hints on how to approach this.
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