AN ENTITY BIDIRECTIONAL AUTHENTICATION METHOD AND SYSTEM Application EP-2224638-A4 European Patent Office 27 Mar 2013
CERTIFICATE-BASED ENCRYPTION AND PUBLIC KEY INFRASTRUCTURE Application EP-1540875-A4 European Patent Office 26 Jan 2011
Security method and apparatus using biometric data Grant US-7693279-B2 United States of America 06 Apr 2010
Method, system and device for enabling delegation of authority and access control methods… Grant US-7516321-B2 United States of America 07 Apr 2009