Cloud disk key replacement method and device

The invention relates to a cloud disk key replacement method and device, and the method comprises the steps: responding to a key replacement instruction, dividing a first cloud disk into a plurality of sections, wherein the key replacement instruction comprises a first key, performing key conversion processing on data in each section of the first cloud disk according to the first key and a secondkey, and determining and recording a key conversion state of any section according to the key conversion processing operation for the section, wherein the first key is obtained after key conversion processing is carried out on the first cloud disk and the second key is obtained before key conversion processing is carried out on the first cloud disk. According to the cloud disk key replacement method and device provided by the invention, the key conversion time can be saved, and the problem of service interruption caused by key conversion of the first cloud disk can be avoided. 本申请涉及一种云磁盘密钥的更换方法及装置，包括：响应于密钥更换指令，将第一云磁盘划