Electric vehicle charging station system

A method, comprising:

• receiving, by a transactions module of a station application stored in and executable by a computing device of an electric vehicle (EV) charging station, a vehicle communication from a vehicle application running on a computing device of an electric vehicle to initiate supplying of electric energy by the EV charging station, the vehicle communication comprising vehicle identification information, a vehicle public key, a vehicle certificate associating the vehicle public key to the vehicle identification information, a charging request, a respective freshness factor, and a vehicle digital signature of the request signed using a vehicle private key corresponding to the vehicle public key;
• in response to receiving the vehicle communication, verifying, by the transactions module, the vehicle certificate and then verifying the vehicle digital signature using the vehicle public key;
• in response to a successful verification of the vehicle digital signature:
• sending, by the transactions module, a station communication to the vehicle application, the station communication comprising station identification information, a station public key, a station certificate associating the station public key to the station identification information, a message, and a station digital signature of the request signed using a station private key corresponding to the station public key;
• and
• initiating, by the transactions module, supplying electric energy to the electric vehicle via the supply part;
• and
• supplying, by a supply part of the EV charging station, electric energy to at least one vehicle battery;
• during supplying of the electric energy by the supply part:
• receiving, by the transactions module, a plurality of additional vehicle communications from the vehicle application, each communication of the plurality of additional vehicle communications comprising the vehicle identification information, the vehicle public key, a respective vehicle digital signature of the communication, and a respective freshness factor;
• and
• in response to receiving a given communication of the plurality of additional vehicle communications:
• verifying, by the transactions module, the vehicle digital signature using the vehicle public key;
• determining, by the transactions module, whether a session between the station application and the vehicle application has expired;
• continuing, by the transactions module, to permit the supply of the electric energy in response to successful verification of the vehicle digital signature and a determination that the session has not expired;
• and
• terminating, by the transactions module, the supply of the electric energy to complete the supplying of electric energy in response to at least a determination that the session has expired.

An electric vehicle, comprising:

• a battery configured to receive electric energy from a supply part;
• a computing device configured to manage supplying of electric energy to electric vehicles;
• and
• a transactions module of a vehicle application stored in and executable by the computing device of the electric vehicle to:
• receive a station communication from a station application running on a computing device of a charging station of the plurality of charging stations to continue initiation of supplying of electric energy by an electric vehicle (EV) charging station, the station communication comprising station identification information, a station public key, a station certificate associating the station public key to the station identification information, a charging response to a charging request of the electric vehicle, and a station digital signature of the response signed using a station private key corresponding to the station public key;
• in response to receiving the station communication, verify the station certificate and then verify the station digital signature using the station public key;
• in response to a successful verification of the station digital signature:
• send a vehicle communication to the station application, the vehicle communication comprising vehicle identification information, a vehicle public key, a vehicle certificate associating the vehicle public key to the vehicle identification information, a message, a respective freshness factor, and a vehicle digital signature of the response signed using a vehicle private key corresponding to the vehicle public key;
• and
• initiate receiving electric energy by the battery of the electric vehicle from the supply part of the charging station;
• and
• during receiving of the electric energy by the battery:
• receive a plurality of additional station communications from the station application, each communication of the plurality of additional station communications comprising the station identification information, the station public key, and a respective station digital signature of the communication;
• and
• in response to receiving a given communication of the plurality of additional station communications:
• verify the station digital signature using the station public key;
• determine whether a session between the station application and the vehicle application has expired;
• continue to permit the receiving of the electric energy in response to successful verification of the station digital signature and a determination that the session has not expired;
• and
• terminate the receiving of the electric energy to complete the supplying of electric energy in response to at least a determination that the session has expired.