Security and Communication Networks

Research Article

A Robust Watermarking Scheme for Online Multimedia Copyright Protection Using New Chaotic Map

Table 1

NIST statistical tests to check the randomness of chaotic sequences generated by EL map for initial conditions of , , and . The results show that the chaotic sequences passes the randomness statistical tests.
Statistical Test Value Decision
Frequency (Mono Bit) Test 0.9984Passed
Frequency Test within a Block 
  (Blocks sizes: 3, 4, 5, 6, 7, 8) 0.6845Passed
The Runs Test 0.0409Passed
Tests for the Longest-Run-of-Ones in a Block 
  (Blocks size: 8) 0.3089Passed
The Binary Matrix Rank Test 
  (4 Matrices, Rows: 8, Columns: 8) 0.0886Passed
  (16 Matrices, Rows: 4, Columns: 4) 0.1547Passed
The Discrete Fourier Transform (Spectral) Test 0.1007Passed
The Non-overlapping Template Matching Test 
  (Template length = 4, Blocks = 2, 4, 8) 0.0314Passed
The Overlapping Template Matching Test 
  (Template length = 4, Blocks = 4, 8) 0.5947Passed
Maurer’s Universal Statistical Test 0.2514Passed
The Approximate Entropy Test 0.3108Passed
The Cumulative Sums (CUSUM) Test 0.4512Passed