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Anonymous attribute-based broadcast encryption with hidden multiple access structures
Designs, Codes and Cryptography ( IF 1.6 ) Pub Date : 2024-04-06 , DOI: 10.1007/s10623-024-01373-2
Tran Viet Xuan Phuong

Due to the high demands of data communication, the broadcasting system streams the data daily. This service not only sends out the message to the correct participant but also respects the security of the identity user. In addition, when delivered, all the information must be protected for the party who employs the broadcasting service. Currently, Attribute-Based Broadcast Encryption (ABBE) is useful to apply for the broadcasting service. (ABBE) is a combination of Attribute-Based Encryption (ABE) and Broadcast Encryption (BE), which allows a broadcaster (or encrypter) to broadcast an encrypted message, including a predefined user set and specified access policy to install the authorization mechanism. It is desirable to hide all the information when producing in the ciphertext, which has not been considered in the previous works of ABBE. Motivated by the above issue, we devise a solution to achieve anonymity for the ABBE scheme, which not only hides the access structures but also anonymizes the user’s identity. In this work, we propose two schemes as Anonymous Key Policy (AKP)-ABBE and Anonymous Ciphertext Policy (ACP)-ABBE with supporting multiple access structures by using \(\textsf {OR}/\textsf {AND}\) gates. Specifically, we present the generic constructions of AKP/ACP-ABBE on the building block of the Inner Product Encryption (\(\textsf {IPE}\)), which enables the hidden user’s identity and complex \(\textsf {OR}/\textsf {AND}\)-Gate access structure. We show that our proposed schemes are secured under the standard models.



中文翻译:

具有隐藏多路访问结构的基于匿名属性的广播加密

由于数据通信的高要求,广播系统每天都会传输数据。该服务不仅将消息发送给正确的参与者,而且尊重身份用户的安全。此外,在交付时,必须为使用广播服务的一方保护所有信息。目前,基于属性的广播加密(ABBE)对于应用于广播服务是有用的。 (ABBE) 是基于属性的加密 (ABE) 和广播加密 (BE) 的组合,它允许广播者(或加密者)广播加密消息,包括预定义的用户集和指定的访问策略来安装授权机制。在产生密文时希望隐藏所有信息,这在ABBE之前的工作中没有考虑到。受上述问题的启发,我们设计了一种解决方案来实现ABBE方案的匿名性,该方案不仅隐藏了访问结构,而且还匿名了用户的身份。在这项工作中,我们提出了两种方案:匿名密钥策略(AKP)-ABBE 和匿名密文策略(ACP)-ABBE,通过使用\(\textsf {OR}/\textsf {AND}\)门支持多种访问结构。具体来说,我们在内积加密 ( \(\textsf {IPE}\) )的构建块上呈现 AKP/ACP-ABBE 的通用结构,它能够隐藏用户的身份和复杂的\(\textsf {OR}/ \textsf {AND}\) - 门访问结构。我们证明我们提出的方案在标准模型下是安全的。

更新日期:2024-04-07
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