AI 中文总结
针对动态群组通信的机密性与接收者匿名性需求，提出ABEAT系统，通过新型匿名KP-ABE方法降低非接收者解密开销90倍以上，性能优于HVE与FABEO。
AI 中文摘要
动态参与者群组间的机密通信需具备灵活高效的多对多通信能力，这是一项高度受需求的功能。我们利用属性加密（ABE）实现机密群组通信，并通过基于图的命名空间对其进行增强，构建了一个可动态组建和变更群组的高效框架。本文聚焦于使用ABE进行群组通信时，需维护消息接收者匿名性的重要额外需求，适用于应急响应等多种使用场景。我们提出ABEAT，这是一个高效的匿名动态群组通信系统，同时最小化非预期接收者的开销。在ABEAT中，我们提出一种新的匿名密钥策略属性加密（KP-ABE）方法以维护接收者匿名性，该方案隐藏KP-ABE密文中的明文属性，并能抵御多种试图破坏匿名性的攻击。ABEAT提供快速接收者验证，与当前最先进技术如隐式向量加密（HVE）相比，非接收者的解密开销降低了90倍以上，甚至比不提供匿名性的FABEO还要低40%。
英文摘要
Confidential communication among a dynamic group of participants that ensures flexible and efficient many-to- many communication is highly desired capability. We leverage attribute-based encryption (ABE) for confidential group communication and enhance it by a graph-based namespace to create an efficient framework that allows groups to be formed and changed dynamically. In this paper, we focus on the important additional need to maintain the anonymity of recipients of a message, when using ABE for group communication for a variety of usage scenarios (e.g., emergency response). We propose ABEAT, an efficient and anonymous dynamic group communication system that also minimizes overhead on receivers who are not the intended recipients of a message. In ABEAT, we propose a new anonymous KP-ABE approach to maintain recipient anonymity. ABEAT hides the clear attribute in the ciphertext of KP-ABE, and also prevents several attacks that seek to break anonymity. ABEAT provides fast recipient verification, dramatically lowering the decryption overhead for non-recipients by more than a factor of 90 versus the current state of the art such as hidden vector encryption (HVE). In fact, it is even 40% less than FABEO, which offers no anonymity.
Comments19 pages, 22 figures. Full version of the ICNP 2026 accepted paper with same name
