PixelCryptor.
File encryption utility PixelCryptor doesn’t use a textual password to encrypt your files, it uses a digital image. Lock up your PixelCryptor file package like a drum and set an image as the key. The more complex the image, the more secure your encrypted folder. Then, on another PC with PixelCryptor installed (or available on a thumb drive), unlock the folder contents only with the image you used to encrypt it.
PixelCryptor -download- (via LifeHacker)
