The PaaK IC (Password Authenticated Key Exchange Integrated Circuit) is a secure component used in Automotive Electronics systems, particularly within the domain of Functional Safety & Security. It plays a crucial role in enabling Passive Entry & Passive Start (PEPS) systems, which allow drivers to unlock and start their vehicles without physically using a key fob. The PaaK IC ensures secure communication between the vehicle and the key fob by authenticating the user through a cryptographic protocol. In PEPS systems, the PaaK IC is responsible for generating and exchanging cryptographic keys securely, preventing unauthorized access and ensuring the integrity of the communication process. This technology enhances both convenience and security, as it eliminates the need for manual key insertion while protecting against relay attacks and other forms of electronic interference. PaaK ICs are widely used in modern vehicles to support keyless entry and ignition features. They are integrated into the vehicle’s control unit and work in conjunction with the key fob, which contains a unique identifier and encryption module. This setup allows the vehicle to recognize the authorized user and grant access only when the correct credentials are verified. By incorporating PaaK IC technology, automotive manufacturers can meet stringent functional safety and security standards, such as ISO 26262 and ASIL (Automotive Safety Integrity Level) requirements. This makes the PaaK IC an essential component in the development of secure and reliable automotive electronic systems, enhancing both driver experience and vehicle protection.