A new photo sharing app called Yovo protects your pictures and messages from screenshots. Developed by a privacy software company called ContentGuard, the iOS-enabled app uses a common optical illusion to make your sent snaps a lot harder for the receiver to screenshot. "Everyone is becoming more conscious of the digital trail they leave. It seems as though there isn't a day that goes by where we do not see a headline about the consequences of inadvertent or malicious digital publication of our private lives," its developer Scott Richardson was