In the present world, when human needs have been developed, spiritually, human rights are also paid special attention, especially privacy. With all developed countries in the world, the privacy of every human being has been incorporated into the Constitution as well as the Law to ensure human rights. In each of our smart devices, it seems like there are plenty of our own secrets that we do not want anyone to know, so the application manufacturers have released many products that bring features. In particular, it is impossible not to mention Vault – Hide Pics and Video, Lock apps, Free Backup. With the extremely smart new features, this is definitely an indispensable product in smart devices for users.