Cross-domain identity authentication method based on proxy re-signature

• Main Authors: YANG XIAODONG, KANG BURONG, LI YANAN, LI CHENYI, ZHANG LINGGANG, ZHOU QIXU, GAO GUOJUAN, YANG MIAOMIAO, DENG YUNXIA
• Format: Patent
• Language: Chinese; English
• Published: 20.04.2016
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The invention discloses a cross-domain identity authentication method based on proxy re-signature. In the method, after one user registers as a registered user of several trusting domains, the user requests for applying for a certificate and registering as a proxy; after auditing, all CAs receive information of the registered user, generate a certificate for a public key of the registered user and issue the certificate to the registered user, thus, the registered user becomes the proxy, and generates a re-signature private key between the agented certificate certification agencies; when a first user transmits message to a second user of a foreign domain, the first user transmits own certificate, and the second user transmits the certificate to the proxy; the proxy uses a root CA public key of the certificate to verify the certificate, generates a temporary certificate of the CA in the domain of the second user for the first user with the re-signature private key and the public key of the CA in the domain of t