An Efficient Identity-Based Homomorphic Broadcast Encryption

• 作者: Mei Cai
• 来源期刊: 电脑和通信(英文)
• 学科: 工学
• 关键词: IDENTITY-BASED BROADCAST ENCRYPTION Homomorphic COMMUNICATION
• 年，卷（期）: 2019,（2）
• 页码范围: 23-30
• 页数: 8页
• 分类号: TN91

摘要

Broadcast encryption (BE) allows a sender to broadcast its message to a set of receivers in a single ciphertext. However, in broadcast encryption scheme, ciphertext length is always related to the size of the receiver set. Thus, how to improve the communication of broadcast encryption is a big issue. In this paper, we proposed an identity-based homomorphic broadcast encryption scheme which supports an external entity to directly calculate ciphertexts and get a new ciphertext which is the corresponding result of the operation on plaintexts without decrypting them. The correctness and security proofs of our scheme were formally proved. Finally, we implemented our scheme in a simulation environment and the experiment results showed that our scheme is efficient for practical applications.