Asymmetric Encryption

Public-key cryptography: different keys for encryption and decryption

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The Secret Exchange Mystery

How can two people agree on a secret when everyone is watching?

Imagine Alice and Bob want to create a shared secret to encrypt their messages, but Eve is listening to everything they say. How can they do it?

The Paint Mixing Analogy

Think of colors instead of numbers. Mixing paint is easy, but unmixing paint is nearly impossible. This is the key insight behind asymmetric cryptography!

Alice and Bob each have a secret color. They want to end up with the same shared color without ever revealing their secrets.