Main content

## Computers and the Internet

### Course: Computers and the Internet > Unit 4

Lesson 5: Data encryption techniques# Symmetric encryption

## Problem

Stuck?

Stuck?

If you're seeing this message, it means we're having trouble loading external resources on our website.

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

Main content

Stuck?

Stuck?