A public key encryption system for authenticating an image includes a digital camera having embedded therein a private key unique to the digital camera. A known public key uniquely based upon the private key is used to decrypt digital data encrypted with the private key to establish authenticity of the...http://www.google.fr/patents/US5898779?utm_source=gb-gplus-shareBrevet US5898779 - Photograhic system with selected area image authentication
Photograhic system with selected area image authentication
