Use RSA to encrypt the data. The data can't be decode with out key.
We don't save the key for decryption on the server. So we can't decode the code if your don't provide the Passcode for calculation the RSA key. So please keep a mind that we can't help you to reset the passcode if you forgot it.
After you import files, such as video file, we can decode and play at the same time, even it is not offline.
Detect file resources in the web content and you can select the file you want to download. If it is video, you can also play it when downloading. But please keep a mind that the resource may be subject to copyright. Learn More
You can import files from iTunes. You can also export files to iTunes. The file will be under the state of unencrypted when exporting.