Computer access security code system
December 5, 2008. 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 3798605 Computer terminal security system Key controlled block-cipher cryptographic system employing a multidirectional shift matrix Method for authenticating the identity of a user of an information system Cryptographic communication security for single domain networks Method and apparatus for transaction and identity verification Data processing system which protects the secrecy of confidential data Computer accessing system Rapid instruction redirection Data processing system providing data security through coded identification of accessing terminals InventorAssigneeApplicationNo. 279630 filed on 12/05/1988US Classes:713/184, PIN/password generator device380/45Multiple key levelExaminersPrimary: Cangialosi, SalvatoreAttorney, Agent or FirmInternational ClassH02L 009/04AbstractA security code system for controlling access to computer and computer-controlled entry situations comprises a plurality of subsets of alpha-numeric charcters disposed in random order in matrices of at least two dimensions forming theoretical rectangles, cubes, etc., such that when access is desired, at least one pair of previously unused character subsets not found in the same row or column of the matrix is chosen at random and transmitted by the computer. The proper response to gain access is transmittal of subsets which complete the rectangle, and/or a parallelepiped whose opposite corners were defined by first groups of code. Once used, subsets are not used again to absolutely defeat unauthorized access by eavesdropping, and the like.Other References
Field of SearchMultiple key level | |
