发明名称 |
Implementing hacking detection and block function at indeterminate times with priorities and limits |
摘要 |
A method and circuits for implementing a hacking detection and block function at indeterminate times, and a design structure on which the subject circuit resides are provided. A circuit includes an antenna wrapped around a dynamic bus inside circuitry to be protected. The antenna together with the dynamic bus node is designed so an average bus access activates a field effect transistor (FET) that is connected to a capacitor. The FET drains the capacitor in a specified number of activations by the antenna. The capacitor has a leakage path to a voltage supply rail VDD that charges the capacitor back high after a time, such as ten to one hundred cycles, of the dynamic bus being quiet. The capacitor provides a hacking detect signal for temporarily blocking operation of the circuitry to be protected responsive to determining that the dynamic bus is more active than functionally expected.
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申请公布号 |
US8384414(B2) |
申请公布日期 |
2013.02.26 |
申请号 |
US201113031748 |
申请日期 |
2011.02.22 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION;ERICKSON KARL R.;PAONE PHIL C.;PAULSEN DAVID P.;SHEETS, II JOHN E.;UHLMANN GREGORY J.;WILLIAMS KELLY L. |
发明人 |
ERICKSON KARL R.;PAONE PHIL C.;PAULSEN DAVID P.;SHEETS, II JOHN E.;UHLMANN GREGORY J.;WILLIAMS KELLY L. |
分类号 |
H03K19/00 |
主分类号 |
H03K19/00 |
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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