Are your worried about people being able to listen in on your phone conversations? Maybe the latest NSA revelations have you feeling a bit uneasy about your privacy. You could always encrypt your voice using tools like JackPair to protect your privacy a bit. This interesting device is compatible with all kinds of phones. It connects through standard 3.5mm audio jacks and secures your line when you push the appropriate button. The system shows you when you have a secure line.
You don’t need to remember a password to get this to work. JackPair encrypts your conversation using a One-Time-Secret -Key (OTSK) that is created on the fly. It is automatically self-destroyed after your conversation ends. The developer is planning to open source the encryption software in JackPair in the future. Like what you see? You can support this project on Kickstarter.