What type of attack does Adam's 6-digit PIN aim to prevent in an RFID system?

The 6-digit PIN that Adam uses in an RFID system primarily aims to prevent badge cloning. In an RFID context, badge cloning refers to the unauthorized copying of an RFID card or badge, which can then be used to gain access to restricted areas or information. By implementing a PIN as an additional layer of security, it adds a requirement that must be met in order to authenticate the RFID badge. This helps to ensure that even if someone successfully clones the RFID badge, they would still need to know the correct PIN to use the cloned badge effectively.

The specific usage of a PIN in this scenario serves as a deterrent against attacks that would exploit the unique identification features of the RFID. Without knowledge of the PIN, any cloned badge would be rendered useless in actual access situations where the PIN is required for validation. This setup effectively strengthens the security of the RFID system by combining a physical token (the badge) with something the user knows (the PIN).