Signed Flag

This feature allows flag to be unique for each players.

It can be usefull to reduce flag sharing.

Usage

The is multiple ways to use this feature

Way 1 - Multiple instance challenge

Challenge must:

• Be a multiple instance
• Use an env var FLAG to set the flag.

Exemple

Way 2 - XSS challenge

Challenge must:

• Be a multiple or single instance
• Be a web challenge, with xss: true

Exemple

Then, you need to set sign_flag: true in your challenge config.yaml