Security Analysis of CMAC in the Multi-user Model

被引：0

作者：

Zhang, Xiangyang ^{[1
]}

Shen, Yaobin ^{[2
]}

Wang, Lei ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Shanghai 200240, Peoples R China

[2] Xiamen Univ, Xiamen 361005, Peoples R China

来源：

INFORMATION SECURITY, PT I, ISC 2024 | 2025年 / 15257卷

基金：

中国国家自然科学基金;

关键词：

CMAC; OMAC1; Multi-User Security; MAC; Message Authentication Code; ARBITRARY-LENGTH MESSAGES; CBC MACS; OMAC; TMAC; BOUNDS; SUM;

D O I：

10.1007/978-3-031-75757-0_4

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

CMAC, also known as OMAC1, is an efficient message authentication code (MAC) and has been standardized by NIST and other organizations. It has been widely applied in IPSec, IKE and many wireless networks. Multi-user security captures a practical scenario where an adversary targets a particular service related to multiple users. Lots of MAC constructions have been rigorously analyzed in the multi-user model. However, the concrete analysis for CMAC in the multi-user model is still a blank in the literature. To fill the gap, we provide a concrete multi-user security bound for CMAC in this paper. Our bound is better than that from generic reduction and we observe that the online security of CMAC in the multi-user model does not degrade from the single-user model.

引用

页码：67 / 86

页数：20

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