The ENT is a statistical test designed by the J. Walker engineers in Switzerland in 1998 to detect the characteristics of random sequences.
The ENT is a random number sequence test program. The program applies various tests to sequences of bytes stored in files and reports the results of those tests. The program is useful for evaluating pseudo-random number generators for encryption and statistical sampling applications, compression algorithms, and other applications where the information density of a file is of interest. The test has become a common international testing procedures of randomness.