OPG Cipher - Version 2.0 OPG Cipher encrypts data with the highly secure military-standard AES algorithm. It is highly customizable and lets you delete source files without a chance to recover them. Just drag-and-drop your files or copy-and-paste your texts and let OPG Cipher go to work. The build-in password generator creates secure, tailor-made passwords to raise the protection even more.By using OPG Cipher you can be sure that your files are unchanged and exactly what you expect them to be. A check sum gives you the control and the security you need to trust the source. Same thing for texts: Be sure that not even one letter was changed! Do you want to give away a secret message? No problem! Just integrate your secret message into a picture with OPG Cipher and send it to your recipient. He can than extract the message from the picture.