Key fob

A key fob for accessing a vehicle, wherein the key fob comprises:

• a secure element comprising:
• a microcontroller unit;
• a non-volatile memory module communicably coupled to the microcontroller unit, the non-volatile memory module configured to store a first system software for running a first vehicle access application and a second system software for running a second vehicle access application;
• and
• one or more secure hardware blocks communicably coupled with the microcontroller unit;
• wherein the key fob is configured to operate in a first mode or second mode, wherein, in the first mode, the microcontroller unit is configured to:
• activate the one or more secure hardware blocks;
• operate at a first clock speed;
• and
• boot the first system software;
• and
• in the second mode, the microcontroller unit is configured to:
• boot the second system software;
• and
• perform one or more of:
• inhibit activation of one or more of the secure hardware blocks;
• and
• operate at a second clock speed that is lower than the first clock speed.

A method of operating a key fob for accessing a vehicle, the key fob including a secure element comprising a microcontroller unit;

• a non-volatile memory module communicably coupled to the microcontroller unit, the non-volatile memory module configured to store a first system software for running a first vehicle access application and a second system software for running a second vehicle access application;
• and one or more secure hardware blocks communicably coupled with the microcontroller unit, the method comprising:
• in a first mode:
• activating, by the microcontroller unit, the one or more secure hardware blocks;
• operating the one or more secure hardware blocks at a first clock speed;
• and
• booting the first system software;
• and
• in a second mode:
• booting the second system software;
• and
• performing one or more of:
• inhibiting activation of one or more of the secure hardware blocks;
• and
• operating the one or more secure hardware blocks at a second clock speed that is lower than the first clock speed.