Abstract: Disclosed are systems and methods of authenticating a user on a network, including, based on identity information received from the user, accessing at least one data source to retrieve data associated with the user, comparing the retrieved data against a listing of possible questions associated with the retrieved data to determine associations between the retrieved data and the listing of possible questions, based on a ranking of the listing of possible questions, formulating at least one question set using questions within the listing of possible questions for which retrieved data is available, where each of the at least one question set includes at least two different questions, causing at least some of the questions from the at least one question set to be presented to the user, and, based on responses to the questions from the user, determining whether the user is authenticated.

Abstract: Disclosed are systems and methods of authenticating a user on a network, including, based on identity information received from the user, accessing at least one data source to retrieve data associated with the user, comparing the retrieved data against a listing of possible questions associated with the retrieved data to determine associations between the retrieved data and the listing of possible questions, based on a ranking of the listing of possible questions, formulating at least one question set using questions within the listing of possible questions for which retrieved data is available, where each of the at least one question set includes at least two different questions, causing at least some of the questions from the at least one question set to be presented to the user, and, based on responses to the questions from the user, determining whether the user is authenticated.

Abstract: Disclosed are systems and methods of authenticating a user on a network, including, based on identity information received from the user, accessing at least one data source to retrieve data associated with the user, comparing the retrieved data against a listing of possible questions associated with the retrieved data to determine associations between the retrieved data and the listing of possible questions, based on a ranking of the listing of possible questions, formulating at least one question set using questions within the listing of possible questions for which retrieved data is available, where each of the at least one question set includes at least two different questions, causing at least some of the questions from the at least one question set to be presented to the user, and, based on responses to the questions from the user, determining whether the user is authenticated.

Abstract: Disclosed are systems and methods of authenticating a user on a network, including, based on identity information received from the user, accessing at least one data source to retrieve data associated with the user, comparing the retrieved data against a listing of possible questions associated with the retrieved data to determine associations between the retrieved data and the listing of possible questions, based on a ranking of the listing of possible questions, formulating at least one question set using questions within the listing of possible questions for which retrieved data is available, where each of the at least one question set includes at least two different questions, causing at least some of the questions from the at least one question set to be presented to the user, and, based on responses to the questions from the user, determining whether the user is authenticated.

Abstract: An automatic reorder and alarm system for use with residential fuel-oil tanks which sends reorder and alarm data to a central station over the direct-dial telephone network when the fuel-oil level in the tank falls below a predetermined value or when an alarm situation, such as low temperature, occurs at the tank location. An inexpensive sensor/sending unit located at each customer tank includes a simple sensor which mounts on either the tank or an existing fuel-oil level gauge, a microcontroller circuit and a modem circuit. The microcontroller circuit uses a simple low-stability oscillator as a reference for internal operations and for modem transmission frequencies. Because the oscillator frequency cannot be precisely determined due to component tolerances and has a substantial amount of drift, a special data transmission format is used for data transmission over the telephone lines between the microcontroller and the central station.