The present invention is a system for providing secure access and execution of application software stored on a first computer by a second computer using a communication device while a communication link is maintained between the first and second computers. More specifically, the present invention is...http://www.google.es/patents/US5638513?utm_source=gb-gplus-sharePatente US5638513 - Secure software rental system using continuous asynchronous password verification
Secure software rental system using continuous asynchronous password ...