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公开(公告)号:US20150186676A1
公开(公告)日:2015-07-02
申请号:US14145991
申请日:2014-01-01
申请人: Mohit Arora , Prashant Bhargava , Pradip Singh
发明人: Mohit Arora , Prashant Bhargava , Pradip Singh
IPC分类号: G06F21/64
CPC分类号: G06F21/725
摘要: A system for securing a real-time clock (RTC) of an electronic device includes a RTC counter that counts clock pulses of a RTC signal generated by a crystal oscillator, and a reference-time register that periodically stores a reference time value generated by a network-clock generator. A hash-value generator uses a predefined hash algorithm to generate first and second hash values based on the reference time value and the count of the RTC counter, respectively, at predetermined time intervals. A comparator compares the first and second hash values and generates a trigger signal when there is a mismatch.
摘要翻译: 用于保护电子设备的实时时钟(RTC)的系统包括对由晶体振荡器产生的RTC信号的时钟脉冲进行计数的RTC计数器和周期性地存储由 网络时钟发生器。 散列值生成器使用预定义的散列算法,以预定的时间间隔分别基于参考时间值和RTC计数器的计数来产生第一和第二散列值。 比较器比较第一和第二散列值,并且当存在不匹配时产生触发信号。