报告题目：Anonymous Identity-Based Broadcast Encryption with Revocation
报 告 人：赖建昌博士（南京师范大学）
报告时间：2018年11月24日（星期六）上午10：30
报告地点：安徽大学磬苑校区理工D楼108室
主办单位：安徽大学计算机科学与技术学院
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科学技术处
2018年11月23日
报告简介：
Broadcast encryption is a useful tool in the data sharing which allows a message to be shared with a group of authorized users. Traditionally, a ciphertext from an identity-based broadcast encryption can be decrypted by the users whose identities are included in the ciphertext. Once the ciphertext has been created, it is not possible to remove any intended receivers from it without conducting decryption. We consider how to revoke users' identities from the ciphertext without the knowledge of the plaintext and the knowledge of the receivers. The solution to this question is found applicable to data sharing in the cloud computing. We design an anonymous identity-based broadcast encryption, which offers the user revocation of ciphertext and the revocation process does not reveal any information of the plaintext and receiver identity. In our proposed scheme, the group of receiver identities are anonymous and only known by the encryptor.