Vehicle communication processor, vehicle communication control method and vehicle

A vehicle communication control method comprising:

• performing an authenticity verification on a digital sign included in digitally signed information that a vehicle receives from an external device disposed outside of the vehicle;
• performing an execution preparation process on data included in the digitally signed information in parallel to the authenticity verification on the digital sign included in the digitally signed information;
• and
• determining whether the data included in the digitally signed information is to be executed in a case where the digital sign included in the digitally signed information is verified as being authentic.

A vehicle communication processor comprising:

• first circuitry configured to receive digitally signed information from an external device, the digitally signed information including data and a digital sign;
• and
• second circuitry configured to process information received by the first circuitry, wherein
• one of the first circuitry and the second circuitry is configured to perform an authenticity verification on the digital sign included in the digitally signed information received by the first circuitry, and
• the second circuitry is configured to
• perform an execution preparation process on the data included in the digitally signed information in parallel to the authenticity verification on the digital sign included in the digitally signed information, and
• determine whether the data included in the digitally signed information is to be executed in a case where the digital sign included in the digitally signed information is verified as being authentic.