Fast Software Implementation of Serial Test and Approximate Entropy Test of Binary Sequence

Algorithm 4

Determine the frequency of all possible m-bit subsequence (octet string).

 Input: a extended octet string of octet length . m is the bit length of subsequence.

 Output:, for each value of .

 Step 1: , for each value of i. .

 Step 2: for , do: 2.1 . 2.2 for , do. if , then: if , then:

 Step 3: return , for each value of .