Asymmetric Group Key Agreement Protocol with Identity-Detection for NGNs

Résumé fourni par la source

With the rise of blockchain and next-generation networks (NGNs) technologies, privacy and security issues have become the main bottlenecks of the conventional network architecture solution. The asymmetric group key agreement (AGKA) protocol is a practical and effective cryptographic primitive in achieving decentralized authentication for zero-trust architecture. However, conventional AGKA protocols suffer from collusion attack issues and cannot provide privacy-preserving authentication with traceability. This paper aims to develop novel approaches for privacy-preserving authentication and secure data sharing for zero-trust architecture. First, we construct an AGKA protocol, which is so far the first AGKA protocol immune to the collusion attack. Next, we develop an anonymous authentication (AA) scheme that supports the anonymity and traceability properties simultaneously. Moreover, benefiting from the immutability of blockchain, the identity of malicious users can be detected. Third, we design a conditional data sharing (CDS) scheme by means of the secret sharing scheme, which could guarantee the confidentiality and reliability of the users' data from multi-cloud. Finally, we conduct security and performance evaluations, which show that the developed schemes can resist different kinds of attacks with high performance.

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