Computer terminal security system
Patent 4430728 Issued on February 7, 1984. Estimated Expiration Date: 
December 29, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 29, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3314051 3647973 3723655 3806882 Terminal apparatus Portable securities selector system Computer terminal security system Method of and system for carrying out calculations by means of a telephone set Secure communication system with remote key setting Method for authenticating the identity of a user of an information system InventorsAssigneeApplicationNo. 06/335972 filed on 12/29/1981US Classes:379/93.02, Access restricting340/5.74, Access to electrical information713/155, Central trusted authority provides computer authentication713/164Security kernel or utilityExaminersPrimary: Chan, Eddie P.Attorney, Agent or FirmInternational ClassesG06F 1/00 (20060101)G06F 21/00 (20060101) AbstractThe invention provides a system for securing the access of a remote computer terminal (130) to a centrally located host computer (300). The system includes a first security circuit (200) interconnected with a calling telephone (100), a calling modem (110), and the remote computer terminal (130) at the remote location for automatically dialing the number of the called telephone (310) at the location of the central host computer (300). A second security circuit (350) is located at the central host computer (300) and is interconnected with the called telephone (130), the called modem (330), and the central host computer (300). Upon receipt of the user identification code, the second security circuit (350) compares the user identification code with a stored code and, if verified, sends an acknowledgment signal back to the first security circuit (200). At this time, the two security circuits (200 and 350) activate respective solid state switches (260 and 370) to interconnect the host computer (300) with the remote computer terminal (130). A portable memory module (240) is selectively insertable in the first security circuit (200) to selectively activate and deactivate the first security circuit and which contains the secret phone number of the called telephone (310) at the host computer (300) as well as the secret user identification code.Other References
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