发明名称 |
DATABASELESS SECURITY SYSTEM |
摘要 |
An improved security system, including a portable smart card and a host computer, eliminates the need for the computer to store individual personal identification (ID) numbers for each user seeking access to the computer. Instead, the computer stores a first encryption algorithm E1 used in converting a particular identification number (ID)n into a secret code Sn for that particular user. Sn also exists within the memory of the smart card having been loaded into its memory atthe time of issue. A challenge number C is generated by the computer and transmitted to the smart card. Within the smart card and the computer, microprocessors respond to the challenge number C, the secret code Sn, and a second encryption algorithm E2 in order to generate response numbers Rn and R'n respectively. Thereafter, Rn is transmitted to the computer where it is comparedwith R'n. A favorable comparison is necessary for gaining access to the computer.
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申请公布号 |
CA2023872(C) |
申请公布日期 |
1995.04.04 |
申请号 |
CA19902023872 |
申请日期 |
1990.08.23 |
申请人 |
AMERICAN TELEPHONE AND TELEGRAPH COMPANY |
发明人 |
CLAUS, DAVID M.;COUTINHO, ROY S.;MURPHY, KEVIN D.;SNAVLEY, JAMES D.;ZEMPOL, KENNETH R. |
分类号 |
E05B49/00;G06F1/00;G06F21/00;G06F21/20;G06K17/00;G07F7/10;G09C1/00;H04L9/32;(IPC1-7):H03M7/28 |
主分类号 |
E05B49/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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