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专利名称：Method and device for preventing
unauthorized access to a computer system
发明人：Peter Bertil Tom Sjooquist申请号：US08/551232申请日：19951031公开号：US05710817A公开日：19980120
摘要：In a method and a device for preventing unauthorised access to a computersystem comprising at least one processing unit (1) or like, a disk unit (3), a display (5), anda keyboard (7), use is made of a floppy disk (9). Information in the form of a personalidentification code containing the name of an authorised user and an access codeencrypted by means of a one-way encrypting function, and an authenticity code formedby a system access code and at least the personal identification code are recorded on thefloppy disk. After insertion of the floppy into the disk unit, the computer system isadapted, in starting-up, to read at least the personal identification code and the
authenticity code; to check the authenticity code by means of the system access code andthe information recorded on the floppy disk and used to form the authenticity code; torequest, via the display, the user to enter his name and access code in non-encryptedform via the keyboards; to encrypt the access code entered by the user; to check theread name against the entered name and, respectively, the read, encrypted access codeagainst the entered access code which is then encrypted by the computer system; and ofgive the user access to the computer system merely in case of a positive result of allthree checks.
申请人：ICL SYSTEMS AB
代理机构：Lee, Mann, Smith, McWilliams, Sweeney, & Ohlson
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