Data backup method and system, electronic equipment and readable storage medium

The invention discloses a data backup method and system, electronic equipment and a readable storage medium, and belongs to the technical field of data processing. The method comprises the following steps: a first device generates a first secret key, a second secret key and a third secret key which have a first association relationship; the first device sends the second secret key to a second device, and sends identification information of the second device and the third secret key to an account cloud server; the first device generates a fourth key for first data generated in the first device; the first device encrypts the first data according to the fourth key to obtain a first ciphertext; the first device encrypts the fourth key according to the first key to obtain a second ciphertext; and the first device backs up the first ciphertext and the second ciphertext to a data cloud server. 本申请公开了一种数据备份方法、系统、电子设备和可读存储介质，属于数据处理技术领域。其中，所述方法包括：第一设备生成具有第一关联关系的第一密钥、第二密钥和第三密钥；所述第一设备将所述第二密钥发送至第二设备，以及将所述第二设备的识别信息和所述第三密钥发