Pervasive security mechanism by combinations of network and physical interfaces

A computer-readable medium storing a program which when executed by a computer, causes the computer to provide pervasive security by a combination of network and physical interfaces to a service to a user including the functions comprising:

• establishing by the user's client device network connectivity to the service;
• generating and transmitting by the service a check-in phase credential to the user's client device, in response to the connectivity to the service;
• determining by the service whether the user enters the generated check-in phase credential into the service in physical proximity to the service;
• and
• invoking the service if the user has entered the generated check-in phase credential into the service in physical proximity to the service,
• wherein the determining by the service determines whether the service is locked by another checked-in user and denies access of the service to the user if the service is locked by another user.

A pervasive computer system providing a service, comprising:

• mean for determining whether the service is locked by another user and denying access of the service to the user if the service is locked by another user;
• means for inputting a check-in phase credential to a service in physical proximity to the service;
• means for authenticating the check-in phase credential;
• means for authorizing use of the service based on the authentication of the check-in phase credential;
• and
• means for providing invisible security to the pervasive computer system using at least one of a check-in/check-out function and a leasing function.