Registration-Based Encryption from Standard Assumptions
Registration-Based Encryption from Standard Assumptions
复制标题
标准假设的基于注册的加密
DOI：
10.1007/978-3-030-17259-6_3
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Sruthi Sekar
中科院分区：
文献类型：
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作者：
Sanjam Garg;Mohammad Hajiabadi;Mohammad Mahmoody;Ahmadreza Rahimi;Sruthi Sekar
Garg、Hajiabadi、Mahmoody 和 Rahimi [TCC’18] 最近提出了基于注册的加密 (RBE) 的概念，目的是从 IBE 中删除私钥生成器 (PKG)。具体来说，RBE 允许使用（紧凑）主公钥对身份进行加密，就像 IBE 的使用方式一样，其优点是 PKG 被称为“密钥管理者”的较弱实体取代，该实体不知道任何秘密密钥。在这里，个人自己生成他们的秘密密钥，然后向密钥管理者公开注册他们的身份和相应的公钥。最后，随着人口的增长，个人从密钥管理者那里获得“罕见”的解密密钥更新。在他们的工作中，他们基于不可区分性混淆和某处统计绑定哈希函数的组合给出了 RBE 方案的构造。然而，他们没有解决基于标准假设构建 RBE 方案的问题。
The notion of Registration-Based Encryption (RBE) was recently introduced by Garg, Hajiabadi, Mahmoody, and Rahimi [TCC’18] with the goal of removing the private-key generator (PKG) from IBE. Specifically, RBE allows encrypting to identities using a (compact) master public key, like how IBE is used, with the benefit that the PKG is substituted with a weaker entity called “key curator” who has no knowledge of any secret keys. Here individuals generate their secret keys on their own and then publicly register their identities and their corresponding public keys to the key curator. Finally, individuals obtain “rare” decryption-key updates from the key curator as the population grows. In their work, they gave a construction of RBE schemes based on the combination of indistinguishability obfuscation and somewhere statistically binding hash functions. However, they left open the problem of constructing RBE schemes based on standard assumptions.