The service of cloud storage for videos encrypts video data and uses financial service encryption technologies for data transmission and dynamic keys during encryption. As both the data and transmission channel are encrypted, hackers cannot play videos even if they intercept the videos. Similarly, the video stored in the SD card is also encrypted. You must log in to the App to view the video stored on the SD card. As a result, even if the SD card is stolen, others cannot view the video on your SD card.