JPEG IMAGE ENCRYPTION USING FUZZY PN SEQUENCES

摘要: The recent explosion in multimedia and networking application places a great demand on efficient transmission of images at low bit rate with high security. Mixing several existing standard encryption techniques image encoding tends to change the compression ratio greatly. In this paper, novel algorithm is embedded as part JPEG scheme meet three major necessities: (1) provide temporal security against casual observer, (2) preserve ratio, (3) remain compliant file format. proposed algorithm, modified DCT blocks are confused by fuzzy PN sequence. addition that, coefficients each block converted unique uncorrelated symbols, which another Finally, variable length encoded bits encrypted chaotic stream cipher. An amalgamation all random combination seeds will required listener/observer where needed only in-terms few hours.