Current profile reveals secret key

1
Current profile reveals secret key
ICs leak information through power supply
supply current

• unprotected AES ASIC cracked under 3 min.

2
Asymmetric power consumption
basic building block same power for every
transition

• Independent of algorithm/arithmetic
• Correct by construction
• Distributed solution

3
First SCA resistant prototype IC
power dissipation data independent
supply current
unprotected AES
protected AES

• de facto immune against Side-Channel Attacks