Attacking on-chip oscillators in cryptographic applications
In this chapter, we describe a complete attack on a ring oscillator (RO) based true random number generator using the electromagnetic side channel. First, we analyze the frequency of the oscillators and their placement in the device. This analysis leads to the active attack that modifies the behavior of the random number generator using a strong electromagnetic field. We show that it is possible to dynamically control the bias of a RO based random number generator implemented in logic devices.
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