标准模型下效率更高的身份基匹配加密

DOI码：

10.13328/j.cnki.jos.007092

发表刊物：

软件学报

刊物所在地：

北京,中国

关键字：

identity-based matchmaking encryption (IB-ME);inner-product matchmaking encryption;dual pairing vector space (DPVS);symmetric external Diffie-Hellman (SXDH) assumption

摘要：

Identity-based matchmaking encryption is a new cryptographic primitive that allows both the receiver and the sender to specify each other’s identity and communicate with each other only when the identities match. Meanwhile, it provides a non-interactive secret handshake protocol to get rid of real-time interaction and further improve participant privacy. This study proposes an identity-based matchmaking encryption (IB-ME) scheme in prime-order groups under symmetric external Diffie-Hellman (SXDH) assumption under the standard model. Realizing short parameters and reducing the matchmaking times during decryption are the most efficient identity-based matchmaking encryption scheme. Additionally, this study also puts forward the first inner product with equality matchmaking encryption (IPE-ME) scheme under the SXDH assumption in the standard model. Technically, it first constructs two schemes in composite-order groups, then simulates them with dual pairing vector space (DPVS) into prime-order groups, and further reduces the parameter size by decreasing the required dimension of dual basis. Finally, for the proposed IPE-ME scheme, this study replaces the equality policy in the first layer of an IB-ME scheme with inner-product policy.

合写作者：

楚乔涵,杜秋妍,高莹

第一作者：

陈洁

论文类型：

期刊论文

通讯作者：

杜秋妍

卷号：

36

期号：

2

页面范围：

698-714

ISSN号：

1000-9825

是否译文：

否

CN号：

11-2560/TP

发表时间：

2024-04-24