Abstract: A remote monitoring system offers both random tracking and scheduled contacts while the monitored person is away from home, and continuous signalling at home, permitting the monitored person to be monitored even while asleep, by providing a remote monitoring system which includes a home monitoring unit for receiving RF transmissions from a wrist device, but which can be self-installed by the wearer of the device. The home monitoring unit transmits periodic status reports concerning the presence of an individual at the location of the monitoring unit, but the direct telephone connection may be replaced by an Internet connection for all but urgent communications.

Abstract: A remote monitoring system offers both random tracking and scheduled contacts while the monitored person is away from home, and continuous signalling at home, permitting the monitored person to be monitored even while asleep, by providing a remote monitoring system which includes a home monitoring unit for receiving RF transmissions from a wrist device, but which can be self-installed by the wearer of the device. The home monitoring unit transmits periodic status reports concerning the presence of an individual at the location of the monitoring unit, but the direct telephone connection may be replaced by an Internet connection for all but urgent communications.

Abstract: A system capable of remotely validating the identity of individuals and monitoring their locations includes a first device attached to the individual being monitored by a circumferential band worn around his wrist, ankle or neck that is capable of electronically generating a sequence of pseudorandom numbers that will cease to function if the band is cut or otherwise opened to detach the device from the individual. The system also includes a second device which is a remote microprocessor or computer based monitor synchronized to the same sequence of pseudorandom numbers and in occasional communication with the individual over telephone lines or some other remote means such as a radio frequency transmission link. The system may be used to limit remote access of computer data bases to authorized individuals or to limit entry to facilities such as offices or buildings on a campus. Access is authorized when the individual communicates a current valid pseudorandom number to the central computer-based monitor.