There may be many scenarios, when you need to save data in protected form for your application in isolated storage. Of course you have an option
  1. To encrypt the data with some encryption algorithm
  2. Save in the isolated storage
Problem with above approach is either you will have to store the key in isolated storage or read it from some external sources. In major scenarios key is residing on the phone itself and it brings the flaw.

Windows Phone Data Protection API helps us to protect data at the application level. On Windows Phone 7 every application has their own key. This key gets created when you first run the application.

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This article is related to

C#,Mobile Development Tutorials,Mobile Developments,Window Phone Tutorials,WP7,WP8,Decryption, Encryption, Isolated Storage, Passowrd, Window 7 Phone Application, Windows 7.1