The present invention relates to a system and corresponding method for a secure end-to-end patient healthcare system which includes wireless medical sensors adapted to be attached to a patient's body and in communication with each other forming a body sensor network within a wireless medical sensor network including one or more body sensor networks； &lambda；-secure keying means incorporated into each wireless medical sensor for enabling secure communications between the wireless medical sensors, and a personal security manager within the body sensor network and in communication with the wireless medical sensors within the body sensor network, the personal security manager providing secure communications with backend services and providing security relationships within the body sensor network by means of the &lambda；-secure keying means, wherein the &lambda；-secure keying means are such that a coalition of no more than &lambda； compromised wireless medical sensors conceals a pairwise key between any two non-compromised wireless medical sensors and provides protection against node compromise until &lambda；+1 wireless medical sensors have been compromised.
