mijia will not lose personal information when purchasing cloud storage. Millet cloud storage is the process of encrypting the communication between the mobile phone terminal and the server terminal during the whole network operation. AES128 encryption channel and signature mechanism are adopted, and the webpage version of the whole website is encrypted with https, which ensures that no third party can intercept data and carry out man-in-the-middle attack during the data transmission process. All personal data of users are stored on the server disk after strict encryption, and even if the maintenance personnel get the disk, it is impossible to decrypt the data, so Mijia will not lose personal information when purchasing cloud storage.