| Original document(19 pages) 中文版 |
A secure credit card has a pair of linear feedback shift registers(LFSRs) for generating a pair of random numbers. The LFSRs each have a unique initial state and feedback tap configuration. Hence, they each produce a unique sequence of numbers. When a financial transaction occurs, the LFSRs are operated for a random number of clock cycles, to create a pair of matched random numbers. Each card issued has unique LFSR settings, and so will produce characteristic random numbers. At a financial institution, the LFSR settings are known, so the financial institution can determine by calculation if the pair of random numbers is authentic. There are many variations, including a credit card with a secret security code for activation, and 2-way 'handshake' communication with the financial institution. Also, one of the LFSRs may be replaced with a binary, or similar counter. |
Application Number
申请号 |
200580003646 |
Application Date
申请日 |
2005.04.07 |
| Title 名称 |
Secure credit card employing pseudo-random bit sequences for authentication |
Publication Number
公开号 |
1914648 |
Publication Date
公开日 |
2007.02.14 |
| Approval Pub. Date |
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Granted Pub. Date |
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| International Classification 分类号 |
G07F7/08;G07F7/10;G07F19/00;G06F7/58 |
Applicant(s) Name
申请人 |
IBM |
| Address 地址 |
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| Inventor(s) Name 发明人 |
Kelley Edward;Motika Franco |
| Attorney & Agent 代理人 |
wu lili |
| More information 更 多 信 息 |
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