Cloud auditing method supporting dynamic updating of data and auditor

• Main Authors: LI RUI, LIU JIAXIN, WU GE, HUA JINGUO, WU QIAOYI
• Format: Patent
• Language: Chinese; English
• Published: 22.08.2023
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The invention provides a cloud auditing method supporting dynamic updating of data and auditing personnel. The method mainly comprises the following steps: a system initialization step, a key generation step, a delegation token generation step, a label generation step, an integrity challenge step, an integrity proof response step, an integrity proof verification step, a delegation token updating step and an integrity proof response updating step. The method has the following characteristics that: 1, the data integrity can only be audited by a specified auditor, so that integrity auditing on outsourcing data of a data owner under the condition of identity constraint of a verifier is realized; 2, when the identity of the verifier needs to be updated, the data owner generates a value related to the authorization token and sends the value to the cloud server, the cloud server performs efficient specified auditor updating, and the data owner does not need to recalculate and upload a message label pair; 3, realizin