Abstract: Access control systems for computing devices retrieve an identifier (ID) of a physical key and determine whether the physical key has been paired. If the physical key has been paired, then the access control system generates an authorization signal equivalent to input of a valid password. If the physical key has not been paired, then the access control system determines whether the physical key is authentic and, if so, proceeds with a pairing process. In other embodiments, the physical key is used to redeem virtual credits exchangeable for value in an e-commerce interface.

Abstract: A time and sleep control system and method is disclosed. According to one embodiment, a computer-implemented method includes providing a first user interface on a computing device that provides digital content to a first user, providing a second user interface associated with an operating environment on the computing device to a second user, where the second user interface provides unrestricted access to the digital content, receiving a request that is configured to be provided by the second user to access the first user interface from the operating environment, where the request allows the second user to provide restricted access to the digital content on the first user interface, granting the request, and receiving a desired time duration on the computing device that is configured to be provided by the second user, where the desired time duration controls a length of time that the first user is allowed to access the first user interface.