Technique for processing messages sent by a communicating device

A security device configured to process a message sent by a communicating device to a receiver device, the security device comprising a processor and a memory, the security device configured to:

• verify that the message sent by the communicating device to the receiver device is a message to be transmitted;
• transmit the message upon a positive verification;
• block the message upon a negative verification;
• and
• receive a notification sent by the receiver device indicating that the transmitted message is to be blocked, in order to block during a verification process subsequent messages of same type as the message for which the notification was received, sent by communicating devices provided by the same manufacturer and of same product identifier as those of the communicating device that sent the transmitted message.

A security system, comprising:

• a security device configured to process a message sent by a communicating device to a receiver device, the security device comprising a processor and a memory, the security device configured to:
• verify that the message sent by the communicating device to the receiver device is a message to be transmitted;
• transmit the message when upon a positive verification;
• block the message upon a negative verification;
• and
• receive a notification sent by the receiver device indicating that the transmitted message is to be blocked, in order to block during a verification process subsequent messages of same type as the message for which the notification was received, sent by communicating devices provided by the same manufacturer and of same product identifier as those of the communicating device that sent the transmitted message;
• a receiver device, arranged to receive the transmitted message sent by the communicating device and transmitted by the security device and to send the notification to the security device.