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that provide higher security against certain fault models. The area overhead
for a 32-bit AES prototype is 36%, and the power consumption is increased
by 55%.
8.4.3 Dynamic Reconfiguration
Dynamically reconfigurable systems are known to have many advantages such
as area and power reduction. The drawbacks of these systems are the reconfig-
uration delay and the overhead needed to provide reconfigurability. Mentens,
Gierlichs, and Verbauwhede [78] show that dynamic reconfiguration can also
improve the resistance of cryptographic systems against physical attacks.
Some advantages of dynamic reconfiguration for cryptosystems have been
explored before. In such systems, the main goal of dynamic reconfigurability
is to use