Computer communications control
January 29, 2002. 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 3761883 3798605 Transaction execution system with secure data storage and communications Block cipher system for data security Product block cipher system for data security Method and apparatus for preventing erroneous data transfer from a digital computer I/O Terminal identification Loop configured data transmission system Method for authenticating the identity of a user of an information system Interface adaptor architecture InventorAssigneeApplicationNo. 06/344205 filed on 01/29/1982US Classes:726/3NetworkExaminersPrimary: Smith, JerryAssistant: Harkcom, Gary V. Attorney, Agent or FirmInternational ClassesG07C 9/00 (20060101)G06F 21/00 (20060101) Foreign Application Priority Data1981-06-05 CAAbstractA secure communication link is provided for transmitting signals between a host computer and at least one authorized terminal. The communication link includes a host modem for modulating and demodulating the signals transmitted between the host computer and the authorized terminal and an access controller. The access controller stores enquiry and reply sequences of bits and is operable to compare incoming signals from the host modem with the stored sequences of bits. Where there is agreement between the signals from the host modem and the stored sequences of bits, the controller establishes the communication link. Where there is no agreement or no reply from the host modem, the controller disconnects the host modem from the link. | |
