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Single sign-on (SSO) solutions are classified into several modes and the flaws of each mode are pointed out in the paper. To overcome these drawbacks, a support heterogeneous systems and multi-management mode SSO (SHM-SSO) schema is proposed. Data modeling and data synchronization strategy is used in the schema to ensure subsystems run well while the Authentication Center (AC) fails and decline the...
Recent researches of image encryption algorithms have been increasingly based on chaotic systems, but the drawbacks of small key space and weak security in one-dimensional chaotic cryptosystems are obvious. This paper presents a new nonlinear chaotic algorithm (NCA) which uses power function and tangent function instead of linear function. Its structural parameters are obtained by experimental analysis...
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