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  • Open Access


    A Post-Quantum Cross-Domain Authentication Scheme Based on Multi-Chain Architecture

    Yi-Bo Cao1,*, Xiu-Bo Chen1, Yun-Feng He2, Lu-Xi Liu2, Yin-Mei Che2, Xiao Wang2, Ke Xiao3, Gang Xu3, Si-Yi Chen1

    CMC-Computers, Materials & Continua, Vol.78, No.2, pp. 2813-2827, 2024, DOI:10.32604/cmc.2024.046816

    Abstract Due to the rapid advancements in network technology, blockchain is being employed for distributed data storage. In the Internet of Things (IoT) scenario, different participants manage multiple blockchains located in different trust domains, which has resulted in the extensive development of cross-domain authentication techniques. However, the emergence of many attackers equipped with quantum computers has the potential to launch quantum computing attacks against cross-domain authentication schemes based on traditional cryptography, posing a significant security threat. In response to the aforementioned challenges, our paper demonstrates a post-quantum cross-domain identity authentication scheme to negotiate the session key… More >

  • Open Access


    Policy-Based Group Signature Scheme from Lattice

    Yongli Tang1, Yuanhong Li1, Qing Ye1,*, Ying Li1, Xiaojun Wang2

    CMC-Computers, Materials & Continua, Vol.72, No.2, pp. 4069-4085, 2022, DOI:10.32604/cmc.2022.026820

    Abstract Although the existing group signature schemes from lattice have been optimized for efficiency, the signing abilities of each member in the group are relatively single. It may not be suitable for complex applications. Inspired by the pioneering work of Bellare and Fuchsbauer, we present a primitive called policy-based group signature. In policy-based group signatures, group members can on behalf of the group to sign documents that meet their own policies, and the generated signatures will not leak the identity and policies of the signer. Moreover, the group administrator is allowed to reveal the identity of… More >

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