Control device for an electronic aerosol provision system

A control device for an electronic aerosol provision system, the control device being configured to receive a replaceable component comprising aerosol precursor material to form an electronic aerosol provision system, the control device including:

• a communication interface for performing communications external to the electronic aerosol provision system;
• a memory configured to hold a set of stored identifiers;
• and
• a control system configured to:
• receive control information from a remote server via the communication interface;
• update the set of stored identifiers based on the control information received from the remote server;
• receive an identifier from a replaceable component received by the control device;
• make a comparison of the received identifier against the set of stored identifiers;
• and
• perform a control action for the electronic aerosol provision system dependent upon the result of said comparison, wherein the received identifier includes multiple pieces of information, wherein each piece of information is compared separately against information held in association with the set of stored identifiers.