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  • Open Access


    Efficient Hierarchical Multi-Server Authentication Protocol for Mobile Cloud Computing

    Jiangheng Kou1, Mingxing He1, *, Ling Xiong1, Zihang Ge2, Guangmin Xie1

    CMC-Computers, Materials & Continua, Vol.64, No.1, pp. 297-312, 2020, DOI:10.32604/cmc.2020.09758

    Abstract With the development of communication technologies, various mobile devices and different types of mobile services became available. The emergence of these services has brought great convenience to our lives. The multi-server architecture authentication protocols for mobile cloud computing were proposed to ensure the security and availability between mobile devices and mobile services. However, most of the protocols did not consider the case of hierarchical authentication. In the existing protocol, when a mobile user once registered at the registration center, he/she can successfully authenticate with all mobile service providers that are registered at the registration center, More >

  • Open Access


    Ameliorate Security by Introducing Security Server in Software Defined Network

    J. Vijila1, *, A. Albert Raj2

    CMC-Computers, Materials & Continua, Vol.62, No.3, pp. 1077-1096, 2020, DOI:10.32604/cmc.2020.08534

    Abstract Software Defined Network (SDN) deals with huge data processing units which possess network management. However, due to centralization behavior ensuring security in SDN is the major concern. In this work to ensure security, a security server has been at its aid to check the vulnerability of the networks and to keep an eye on the packet according to the screening policies. A Secure Shell Connection (SSH) is established by the security server which does a frequent inspection of the network’s logs. Malware detection and the Intrusion Detection System policies are also incorporated in the server More >

  • Open Access


    Synchronization of Robot Manipulators Actuated By Induction Motors with Velocity Estimator

    Felipe J. Torres1,*, Gerardo V. Guerrero2, Carlos D. García2, Ricardo Zavala-Yoe3, Mario A. García1, Adolfo R. López4

    CMES-Computer Modeling in Engineering & Sciences, Vol.121, No.2, pp. 609-630, 2019, DOI:10.32604/cmes.2019.07153

    Abstract A complete modeling (including the actuator dynamics) of a robot manipulator that uses three-phase induction motors is presented in this paper. A control scheme is designed to synchronize robot manipulators actuated by induction motors under a masterslave scheme in the case where the joint velocity of the slave robots is estimated. All of the research on the synchronization of robot manipulators assumes the use of ideal actuators to drive the joints; for that reason, in this work, a three-phase induction motor is considered to be a direct-drive actuator for each joint. An entire model of… More >

  • Open Access


    Server-Aided Multi-Secret Sharing Scheme for Weak Computational Devices

    En Zhang1,2, Xintao Duan1,2, Siuming Yiu3, Junbin Fang4, Zoe L. Jiang5,*, Tsz HonYuen6, Jie Peng1

    CMC-Computers, Materials & Continua, Vol.56, No.3, pp. 401-414, 2018, DOI: 10.3970/cmc.2018.03733

    Abstract In the setting of (t, n) threshold secret sharing, at least t parties can reconstruct the secret, and fewer than t parties learn nothing about the secret. However, to achieve fairness, the existing secret sharing schemes either assume a trusted party exists or require running multi-round, which is not practical in a real application. In addition, the cost of verification grows dramatically with the number of participants and the communication complexity is O(t), if there is not a trusted combiner in the reconstruction phase. In this work, we propose a fair server-aided multi-secret sharing scheme for weak… More >

  • Open Access


    Integration of Peridynamic Theory and OpenSees for Solving Problems in Civil Engineering

    Quan Gu1, Lei Wang1, Surong Huang2,*

    CMES-Computer Modeling in Engineering & Sciences, Vol.120, No.3, pp. 471-489, 2019, DOI:10.32604/cmes.2019.05757

    Abstract Peridynamics (PD) is a powerful method to simulate the discontinuous problems in civil engineering. However, it may take a lot of effort to implement the material constitutive models into PD program for solving a broad range of problems. OpenSees is an open source software which includes a versatile material library and has been widely used by researchers and engineers in civil engineering. In this context, the paper presents a simple but effective approach to integrate PD with OpenSees by using a Client-Server (CS) software integration technique, such that the existing material constitutive models in OpenSees… More >

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