Algorithm 1 Chaotic key stream-generation algorithm.

Input: Chaotic sequence X. Output: The binary sequence file f55.bin. 1:$xb=mod(floor(X\ast {10}^{15}),256)$;   ▹ Get a sequence of integers with values 0–255 2:FID = fopen(‘D:\NIST\f55.bin’,‘w’); 3:COUNT = fwrite(FID,xb,‘uint8’);        ▹ Save the integer sequence xb as binary 4:fclose(FID);