中圖分類號：TN925；TP18
文獻標識碼：A
DOI:10.19358/j.issn.2097-1788.2023.05.001
引用格式：張宏，郭云偉.基于隱蔽通信的訪問控制增強技術綜述［J］.網絡安全與數據治理，2023，42（5）：1-9.

A survey on covert communicationbased access control enhancement technology

Abstract： The network access control model is important for security prevention and protection. Most of the existing network access control models are implemented through encryption, which has defects in concealment and controllability, and is easy to detect and attack. The covert communication technology based on steganographic labels mainly detects whether network packets contain stegantic headers, and determines the flow direction of packets according to access control rules, to effectively control the subject’s access to objects. In addition, this paper introduces the access control rules under several access control methods in detail, and describes the corresponding detection methods for various types of covert channels. Finally, this paper analyzes the development trend of blockchain covert communication construction technology and its detection methods, aiming to provide some significant value for related research.

Key words : access control; covert communication; blockchain; information hiding