Secret Layer lets you encrypt your data and then hide that encrypted data in ordinary images, like the ones used every day on all websites and email attachments. Secret Layer very slightly tweaks the color of specific pixels. You can't distinguish the altered photo from the original one. Any time you transfer an encrypted file to someone by email, Skype, or another method, anyone on your network can see that you're transferring something encrypted. But when you hide your data in a image, to everyone else it looks like you're uploading another photo to the web, just like billions of other people. In other words, your photo can slip away in the crowd, no different from everyone else.