Current time:0:00Total duration:4:32

0 energy points

# Public key cryptography: What is it?

Why do we need public key cryptography? Created by Brit Cruise.

If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.

If you're behind a web filter, please make sure that the domains ***.kastatic.org** and ***.kasandbox.org** are unblocked.

Main content
# Public key cryptography: What is it?

Current time:0:00Total duration:4:32

0 energy points

Why do we need public key cryptography? Created by Brit Cruise.