ABEAT: Efficient and Anonymous Encryption for ABE-based Dynamic Group Communication

2026-08-19

AI Summary

本文提出ABEAT系统，利用基于属性的加密和匿名KP-ABE方法解决动态群组通信中的保密性和匿名性问题，显著降低非接收者的解密开销。

Abstract

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.

Problem

• dynamic group communication
• anonymity
• attribute-based encryption (ABE)
• recipient verification
• decryption overhead

Innovation

• anonymous KP-ABE
• dynamic group communication
• recipient anonymity
• decryption overhead