Encryption Technology Based On Chaos Theory Research And Application

Chaotic system to initial conditions and sensitive to small differences, due to theinherent randomness of existence, over a long period of iterations, the differences ininitial conditions will evolve a large number of random sequences with similar, thesepseudo-random sequence has a wide spectrum and a good cryptographic properties.Encryption algorithm introduced chaos theory, chaos could well be non-lineartransformation, irregular distribution, scope and other non-rule combined with eachother, making the advantages of chaotic encryption algorithm to be reflected.Chaos encryption algorithm is based on the design of the core with randomsequences generated by chaotic systems as the key design. Chaos has a sensitivedependence on initial conditions, when the initial value to a tiny bit of bias, so thechaotic nature of the password generated sequence will continue to enlarge this bias,resulting in two very different for different sequences. Better random properties to getthrough the less number of operations. Since the intrinsic randomness of chaoticequations lead to chaos can not make the future state description and prediction,leading to a chaotic sequence of random distribution of the emergence of chaoticsequence distribution range becomes infinite.Variable key length and variable-length block of plaintext is this chaoticencryption algorithm design, different encryption strength can choose differentencryption methods, making the encryption algorithm for different needs, can have alow overhead operation, efficient operation of the basic features.This focus is based on chaos theory, cryptography, the two most importantsecurity features "confusion" and "diffusion" applied to the public key in the key.Proposed chaotic encryption system based on a double, in the limited precision of theperiod be extended chaotic sequence and encoded with a Huffman tree, the value ofthe chaotic sequence, the sequence to improve the value of the password even afterthe value of the distribution, end encryption strength for different demand for design"a group of a secret" encryption which makes low-dimensional chaotic dynamicalsystems is not easy to attack, selective plaintext attack is not easy to crack the code.