Enhanced Authentication for IMD Communication

A medical system, comprising:

• an implantable medical device,
• an external device configured to control the implantable medical device when the external device has access to the implantable medical device,
• a near field communication device configured to be manually positioned by a user of the implantable medical device for applying a near field signal to the implantable medical device, wherein the implantable medical device is configured to assume an activated mode when the near field signal is applied to the implantable medical device by the near field communication device, and wherein in the activated mode the implantable medical device is configured to receive authentication information relating to the user, and wherein the implantable medical device is configured to allow an access of the external device to the implantable medical device in case the provided authentication information satisfies a pre-defined criterion.