When you keep your most precious information in one place, it's important to have strong security to protect it. Wallet employs 256-bit AES (Advanced Encryption Standard) to secure and encrypt your database.
By keeping an encrypted copy of your database up in the cloud, Wallet can connect from anywhere to access that data and update itself appropriately. You don't have to worry about up-to-date entries or some data overwriting other - Wallet takes care of it automatically.