In this level, you can see an example of Bob sending Alice an encryption key in order to protect their messages. However, their simple protocol is vulnerable to a Mallory-in-the-middle attack.

Mallory has control over a router between Alice and Bob. She can see all messages that pass through this router and she can spoof messages from either Alice or Bob.

To beat this level, you need to trick Alice into encrypting her messages using a key Mallory knows: 31337. You must also trick Bob into thinking he is having a conversation with Alice as normal! See if you can figure out how to trick them both without them discovering your presence between them.

Hint: there is an example of how the encryption protocol works at the top of the field. Use the pause button to see what the values of the packet headers are in the protocol.

### Level Objectives

- trick Alice into encrypting her message with Mallory's key: 31337
- make sure Bob can still read the message, by encrypting it with his key