Random Number Generator Based on Discrete Cosine Transform Based Lossy Picture Compression

The widespread use of digital data makes the security this important. Various cryptographic systems are used to ensure data. most important part these is random numbers. In article, a number generator based on discrete cosine transform, which basis image compression algorithms, proposed. generator, difference between original and compressed produced using transform used. picture transferred frequency plane transform. It then converted back space inverse These transformations cause some losses as certain coefficients taken into account. Raw numbers were generated differences image. Then, possible weaknesses in by passing raw through hash function fixed. SHA-512 algorithm was function. An advantage developed system that it can be easily any source. has been shown analysis safe.