发明名称 |
Validation protocol and system |
摘要 |
This invention concerns a validation protocol for determining whether an untrusted authentication chip is valid, or not. The protocol may be used to determine the physical presence of a valid authentication chip and from that determine whether a consumable containing the chip is valid. In another aspect the invention also concerns a system for validating the chip. The invention involves generating a random number in a trusted authentication chip, then applying a keyed one way function to the random number in both the trusted authentication chip and an untrusted authentication chip and comparing the outcomes. A match indicates that the untrusted chip is valid.
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申请公布号 |
US7249108(B1) |
申请公布日期 |
2007.07.24 |
申请号 |
US20000517539 |
申请日期 |
2000.03.02 |
申请人 |
SILVERBROOK RESEARCH PTY LTD |
发明人 |
WALMSLEY SIMON ROBERT;LAPSTUN PAUL |
分类号 |
G06Q40/00;B41J2/165;B41J2/175;B41J3/42;B41J3/44;B41J11/70;B41J15/04;H04N1/21;H04N5/225;H04N5/262 |
主分类号 |
G06Q40/00 |
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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