Interactive security control system for computer communications and the like
November 9, 2004. 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 3764742 3800284 Method and apparatus for ciphering and deciphering messages Lock system Personal portable terminal for financial transactions Method and means for securing the distribution of encoding keys Method and apparatus for achieving secure password verification Device for the protection of access to a permanent memory of a portable data carrier Method and apparatus for secure message transmission for use in electronic funds transfer systems Computer accessing system InventorsAssigneeApplicationNo. 06/670326 filed on 11/09/1984US Classes:713/159, Including intelligent token380/47Plural generatorsExaminersPrimary: Cangialosi, SalvatoreAssistant: Lewis, Aaron J. Attorney, Agent or FirmInternational ClassesG06F 21/00 (20060101)H04L 9/32 (20060101) AbstractA security control system is provided for interactively identifying and authenticating the authorization of a user of a communications terminal, and optionally providing a means for decoding and encrypting communications signals transmitted to and from the terminal. The system utiizes a security unit that is associated with the terminal, and requires that an encryption device which has been assigned to the user be received in a port that is defined by the security unit in order that the security unit can respond properly to query signals which are sent along a communications link that couples the terminal to other communications equipment. Communications units at both ends of the communications link operate in synchronization such that each new authentication query signal that is sent from one of the units will be answered by an appropriate, newly calculated authenticating signal from the other, whereupon the unit that has sent the query signal checks the received response for correctness of calculation. A feature of the invention resides in requiring that each newly requested authenticating signal differ in a calculated manner from a previously sent authenticating signal, with the manner in which sequential authenticating signals differ being determined, at least in part, by the unique character of the user-assigned encryption device. Optional features that can be included in the encryption device include capabilities to select stored algorithms for use in encrypting, decoding and updating stored encryptions, and to effect control of system operation.Other References
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