Wearable cardioverter defibrillator (WCD) system using security NFC tag for requests of data from memory

A wearable cardioverter defibrillator (WCD) system configured to wirelessly exchange data with an accessing device distinct from the WCD system, the accessing device provided in a peripheral housing and including, within the peripheral housing, a Near Field Communications (NFC) reader configured to transmit a wireless interrogation wave and to receive a backscatter wave transmitted responsive to the interrogation wave, the backscatter wave including encoded access data, a peripheral processor configured to generate validation data from the encoded access data, and an accessing wireless communication module (AWCM) configured to transmit the validation data, the WCD system comprising:

• an electrode;
• a support structure configured to be worn by a patient so as to support the electrode to make electrical contact with a body of the patient;
• an energy storage module configured to store an electrical charge;
• a discharge circuit coupled to the energy storage module, the discharge circuit controllable to discharge the stored electrical charge via the electrode through the patient;
• a defibrillator memory configured to store a program;
• an NFC tag having a tag memory with access data stored in the tag memory, the NFC tag configured to receive the wireless interrogation wave transmitted the NFC reader, the NFC tag further configured to transmit wirelessly the backscatter wave responsive to the received interrogation wave transmitted by the NFC reader, the backscatter wave encoding the access data;
• a defibrillator wireless communication module (DWCM) configured to receive wirelessly the validation data transmitted by the AWCM;
• and
• a defibrillator processor cooperating with the DWCM, the defibrillator processor configured to:
• run the stored program so as to generate a certain decision to shock or not shock,
• store in the defibrillator memory action data relating to at least one of the certain decision and inputs received from a user interface for thus running the program,
• determine that the received validation data has been generated from the backscattered encoded access data,
• cause the DWCM to transmit wirelessly a portion of the action data responsive to determining that the received validation data has been generated from the backscattered encoded access data, and
• control the discharge circuit to thus discharge the electrical charge via the electrode responsive to the certain decision being to shock.