Because chaotic systems are unpredictable,ergodic and sensitive to initial values and parameters,they are often used in the field of *** avoid the bad randomness of the random key generated by the low dimensional chao...
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Because chaotic systems are unpredictable,ergodic and sensitive to initial values and parameters,they are often used in the field of *** avoid the bad randomness of the random key generated by the low dimensional chaotic map system,a 5-dimensional multi-wing hyperchaotic system is adopted in this *** key stream generated by the chaotic system is related to the plaintext *** it can effectively resist the attacks of selecting *** plaintext graph is decomposed into binary form by bit plane decomposition technique,and then these bit planes are divided into high and low *** designed control matrix is used to identify the specific scrambling mode,and each bit is permuted within and between ***,bit diffusion is used to change the pixel value of each *** analysis and numerical simulation show that the algorithm has good encryption performance for image encryption.
The advent of information and communication technology and the Internet of Things have led our society toward a digital *** proliferation of personal computers,smartphones,intelligent autonomous sensors,and pervasive ...
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The advent of information and communication technology and the Internet of Things have led our society toward a digital *** proliferation of personal computers,smartphones,intelligent autonomous sensors,and pervasive network interactions with individuals have gradually shifted human activities from offline to online and from in person to *** transformation has brought a series of challenges in a variety of fields,such as the dilemma of placelessness,some aspects of timelessness(no time relevance),and the changing relevance of distance in the field of geographic information science(GIScience).In the last two decades,“cyber thinking”in GIScience has received significant attention from different *** instance,human activities in“cyberspace”need to be reconsidered when coupled with the geographic space to observe the first law of geography.
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