Schmitt Trigger-Based Key Provisioning for Locking Analog/RF Integrated Circuits
Schmitt Trigger-Based Key Provisioning for Locking Analog/RF Integrated Circuits
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DOI：
10.1109/itc44778.2020.9325209
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
Adriana C. Sanabria-Borbón;Nithyashankari Gummidipoondi Jayasankaran;S. Y. Lee;E. Sánchez-Sinencio;Jiang Hu;Jeyavijayan Rajendran
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文献类型：
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作者：
Adriana C. Sanabria-Borbón;Nithyashankari Gummidipoondi Jayasankaran;S. Y. Lee;E. Sánchez-Sinencio;Jiang Hu;Jeyavijayan Rajendran
模拟/射频性能锁定技术插入可配置组件，以混淆安全模拟块的偏置或设计参数。锁定电路仅在由相同设计的所有芯片实例共享的正确公共密钥决定的特定配置下才符合规格。密钥配置允许为各个芯片实例设计不同的用户密钥。这一领域很少受到研究关注，当增加密钥大小时，幼稚的方法会产生很大的区域开销。提出了一种基于具有可配置滞后的施密特触发器(ST)电路的新方法。所提出的密钥供应与现有的模拟锁定技术兼容，并且无论密钥大小如何，都具有恒定的面积开销。该方法在三个模拟/射频电路上进行了测试，验证了其面积可扩展性和安全性的有效性。
Analog/RF performance locking techniques insert configurable components to obfuscate the biasing or the design parameters of the secured analog block. The locked circuit meets the specifications only under a specific configuration decided by the correct common key, shared by all chip instances of the same design. Key provisioning enables the design of distinct user keys for individual chip instances. This area has received little research attention, and a naive approach yields large area overhead when increasing the key size. We propose a new approach based on a Schmitt trigger (ST) circuit with configurable hysteresis. The proposed key provisioning is compatible with existing analog locking techniques and has a constant area overhead regardless of key size. This approach is tested with three analog/RF circuits to demonstrate its area scalability and effectiveness on security.