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论文类型：期刊论文

发表时间：2016-07-25

发表刊物：SECURITY AND COMMUNICATION NETWORKS

收录刊物：SCIE、EI、Scopus

卷号：9

期号：11

页面范围：1340-1352

ISSN号：1939-0114

关键字：authenticated group; dynamic group; group key agreement; key agreement protocol; asymmetric group key

摘要：Asymmetric group key agreement is a cryptographic primitive allowing a group of users to negotiate a common public encryption key while each of them holds a different secret private decryption key. Anyone (including outsiders) with the public encryption key can send encrypted messages to the group members, and then the group members can decrypt the messages. Authenticated key agreement protocols authenticate the identities of users to ensure that only the intended group members can establish a session in which the group members can communicate with each other. Dynamic asymmetric group key agreement concerns about the scenarios such as ad hoc networks in which the group members may join or leave at any given time. In this paper, we propose a one-round authenticated dynamic protocol for symmetric group key agreement. For efficiency reasons, we employ the identity-based public-key cryptography (IB-PKC) to authenticate users rather than the public key infrastructure and the certificate-less public-key cryptography. Our analysis shows that the proposals in the paper can resist active attacks and meet many desirable security attributes. Besides, our protocol allows users to join or leave the group at the same time. Furthermore, our protocol is round-optimal and has a quite good performance as compared with previous works. Copyright (c) 2016 John Wiley & Sons, Ltd.