How reliable is that? I can't imagine the snapchat app can know if some third party app grabs an image of the screen and does not notify it that a screenshot has been taken.
At the most basic level you can use one phone to take a photo of another phone. If the object is to expose an embarassing photo, that may be enough resolution to accomplish the end. I really think it is impossible to secure the data once it is on a client.
At the most basic level you can use one phone to take a photo of another phone. If the object is to expose an embarassing photo, that may be enough resolution to accomplish the end. I really think it is impossible to secure the data once it is on a client.