Match me if you can: Cryptographic breakthrough helps spies to shake hands

When spies meet, they use secret handshakes to confirm their identities, ensuring they are who they say they are. Now, researchers at Stevens Institute of Technology, and colleagues, have solved a 15-year-old problem that allows handshake-style encryption to be used for time-delayed digital communications such as email—a challenge once thought to be impossible.

* This article was originally published here