Name
Abstract | ||
|---|---|---|
With the exploding number of connected objects and sensitive applications, security against side-channel attacks becomes critical in low-cost and low-power IoT applications. For this purpose, established mathematical countermeasures such as masking and shuffling always require a minimum amount of noise in the adversary’s measurements, that may not be guaranteed by default because of good measurement setups and powerful signal processing. In this paper, we propose to improve the protection of sensitive digital circuits by operating them at a random ultra-low voltage (ULV) supplied by a (V_{dd}) randomizer. As the (V_{dd}) randomization modulates the switching current, it results in a multiplicative noise on both the current consumption amplitude and its time dependence. As ULV operation increases the sensitivity of the current on the supply voltage, it magnifies the generated noise while reducing the side-channel information signal thanks to the switching current reduction. As a proof-of-concept, we prototyped a simple (V_{dd}) randomizer based on a low-quiescent-current linear regulator with a digitally-controlled resistive feedback divider on which we apply a 4-bit random number stream. Using an information theoretic metric, the measurement results obtained in 65 nm low-power CMOS confirm that such randomizers can significantly improve the security of cryptographic implementations against standard side-channel attacks in case of low physical noise in the attacks’ setups, hence enabling the use of mathematical countermeasures. |
Year | Venue | Field |
|---|---|---|
2016 | SPACE | Power analysis,Signal processing,Digital electronics,Linear regulator,Voltage,Aerospace engineering,CMOS,Low voltage,Engineering,Electrical engineering,Multiplicative noise |
DocType | Citations | PageRank |
Conference | 0 | 0.34 |
References | Authors | |
0 | 7 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Dina Kamel | 1 | 118 | 8.58 |
| Guerric de Streel | 2 | 5 | 2.18 |
| Santos Merino Del Pozo | 3 | 16 | 2.74 |
| Kashif Nawaz | 4 | 2 | 1.74 |
| François-Xavier Standaert | 5 | 3070 | 193.51 |
| Denis Flandre | 6 | 316 | 70.47 |
| David Bol | 7 | 162 | 27.67 |