Digital Image Scrambling Based on Improved Arnold Transformation
SI Yin-n · Computer Technology and Development · 2008
With the rapid development of Internet and the modern telecommunication technology,digital information security has increasingly been cared,a higher request has been raised for information transmission safety.Information hiding has become a hot field in the society of information science and technology.The Arnold transformation is always being used in one direction.In this thesis,a modification has been given on Arnold transformation.While the modified Arnold transformation is used to scramble a digital image in two directions,the computing cost are reduced notably and the result of scrambling has a more improvement.By using secret key in scrambling,the security of the algorithm is increased.The approaches are easy to realize,and can be used as the preprocessing for the digital image information hiding.