期刊名称：International Journal of Security and Its Applications
印刷版ISSN：1738-9976
出版年度：2016
卷号：10
期号：7
页码：355-362
DOI：10.14257/ijsia.2016.10.7.31
出版社：SERSC
摘要：Proxy re-encryption (PRE) is a re-encryption technique to enable decryption of information encrypted with a delegator’s public key by using the delegatee’s private key. In existing PRE systems, there are restrictions to prevent delegation, delegatee, and proxy collusion. Therefore, a system to adjust the delegated decryption privilege using multi-proxy is required. This study defines a multi-proxy re-encryption technique based on quorum-controlled asymmetric PRE combined with a proxy that exceeds a threshold. Security weakness against collusion between proxy and delegatee can be prvented by applying such a technique, and re-encryption control by multi-proxy becomes possible.
