Proxy re-encryption method supporting complex access control element description

• Main Authors: YU YAN, ZHAO YINYAN, SU MANG, WANG LIANGCHEN, FU ANMIN, LIAN ZHENG
• Format: Patent
• Language: Chinese; English
• Published: 29.10.2019
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The invention discloses a proxy re-encryption method supporting complex access control element description. The proxy re-encryption method comprises the following steps: establishing a system; creating data; obtaining access control elements; generating a proxy re-encryption key parameter; generating ciphertext data after description; acquiring ciphertext data; and the user decrypting the re-encrypted ciphertext. The XML language is introduced into the proxy re-encryption scheme for unified description, and the flexibility and expansibility of the system are enhanced through a more convenientand faster analysis mode; meanwhile, consideration of attribute weights is added in the description process, so that further management of complex access control elements is realized, and the generation efficiency of the re-encryption key is improved. 本发明公开了一种支持复杂访问控制要素描述的代理重加密方法，包括以下步骤：系统建立；数据创建；访问控制要素获取；代理重加密密钥参量生成；产生描述后的密文数据；密文数据获取；用户进行重加密密文解密。本发明在代理重加密方案中引入了XML语言进行统一化描述，通过更方便快捷的解析方式增强了系统的灵活性和可拓展性；同时，在描述过程中加入对属性权值的考量，实