A biometric sensor may be coupled to a portable communications device, such as a cellular telephone. The biometric sensor may be configured to acquire one or more measurements of biological characteristics of an individual. One or more of the measurements may relate to internal, sub-epidermal characteristics...http://www.google.com.au/patents/US8049597?utm_source=gb-gplus-sharePatent US8049597 - Systems and methods for securely monitoring an individual
