The document proposes an adaptable AES implementation with power-gating support. It includes a multi-profile AES design that can reconfigure based on quality of service and battery life requirements. Different configurations offer varying levels of security, latency, and power consumption. The design also uses power gating techniques like sleep transistors and isolation cells to reduce power consumption. Evaluation shows the approach provides a flexible AES solution with efficient power management for Internet of Things devices.

1. ADAPTABLE AES IMPLEMENTATION
WITH
POWER-GATING SUPPORT
Francesca Palumbo
Università di Sassari -
PolComIng
Information Engineering Unit
Tiziana Fanni, Carlo Sau,and Luigi Raffo
Università di Cagliari
Dept. of Electrical and Electronics Eng.
tiziana.fanni@diee.unica.it
E
O
L
A
B
Subhadeep Banik, Andrey Bogdanov
Technical University of Denmark
DTU Compute
Francesco Regazzoni
Università della Svizzera Italiana
Advanced Learning and Research Institute
ACM International Conference on
Computing Frontiers 2016

2. INTRODUCTION
AES: Advanced Encryption Standard
CF2016-May16-182016,Como(Italy)–TizianaFanni
2
Plaintext
S
R
E
G
K
R
E
G
key
RF1 RF2 RFr
RK1 RK2 RKr
ciphertext
..
.
..
.
Selected by the Institute of Standards and Technology
to be the standard block cipher.
Several implementations are possible.

3. INTRODUCTION
Problem Statement
CF2016-May16-182016,Como(Italy)–TizianaFanni
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Nodes connecting different devices of the internet of things
have to be capable of communicating efficiently with all of
them, despite the different throughput achieved by the
specific device.
Plaintext
S
R
E
G
K
R
E
G
key
RF1 RF2 RFr
RK1 RK2 RKr
ciphertext
..
.
..
.

4. PROPOSED SOLUTION
4
Multi-Profile AES Implementation
CF2016-May16-182016,Como(Italy)–TizianaFanni
High
QoS?
Low
Battery
?
YES/NO
YES/NO
Current
Energy Profile
Profile Manager
Next
Energy
Profile
Multi-Profile System
Plaintext
Key
cipher
text
Multi-Profile
AES

5. COARSE GRAIN RECONFIGURATION
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CGR-AES
Plaintext
S
R
E
G
K
R
E
G
key
M5
M
7
M
8
M6
M2
M3
M9
RF1 RF2 RF3 RF4 RF5 RF6 RF7 RF8 RF9 RF10
RK1 RK2 RK3 RK4 RK5 RK6 RK7 RK8 RK9 RK10
M4
M0
M1
M11M10
ciphertext
M12
Config ID
ID = 0 ID = 1 ID = 2 ID = 3 ID = 4 ID = 5
#rounds 1 2 3 4 5 10
Latency 11 6 5 4 3 1

6. POWER MANAGEMENT
Power Gating
CF2016-May16-182016,Como(Italy)–TizianaFanni
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M11
ciphertext
M12
POWER CONTROLLER
Config ID
PD_1 PD_2 PD_3 PD_4 PD_5
M10
VDD
SW
VDD
SW
VDD
SW
VDD
SW
VDD
SW
iso1
sw1
iso2
sw2
iso3
sw3
iso4
sw4
iso5
sw5
PD_AO
Plaintext
key
VDD
SW
isoiso
iso
iso iso
isoisoisoiso
iso
Sleep transistor
Isolation cell

7. REMARKS
 Reconfigurability  Flexible AES design
 Power gating  Power consumption reduction
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8. ACKNOWLEDGEMENTS
CF2016-May16-182016,Como(Italy)–TizianaFanni
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The research leading to these results has received funding
from:
 the Region of Sardinia
L.R.7/2007 under grant agreement
CRP-18324 [RPCT Project].
 the Region of Sardinia
L.R.7/2007 under grant agreement
CRP-60544 [ELoRA Project].

9. E
O
L
A
B
?
ADAPTABLE AES IMPLEMENTATION
WITH
POWER-GATING SUPPORT
ACM International Conference on
Computing Frontiers 2016
Francesca Palumbo
Università di Sassari -
PolComIng
Information Engineering Unit
Tiziana Fanni, Carlo Sau,and Luigi Raffo
Università di Cagliari
Dept. of Electrical and Electronics Eng.
tiziana.fanni@diee.unica.it
Subhadeep Banik, Andrey Bogdanov
Technical University of Denmark
DTU Compute
Francesco Regazzoni
Università della Svizzera Italiana
Advanced Learning and Research Institute

10. READ FULL ARTICLE
 ACM Digital Library
http://dl.acm.org/citation.cfm?id=2903488
 RPCT Project Website:
http://sites.unica.it/rpct/references/

11. REFERENCE
 @inproceedings{Banik_CF2016,
author = {Banik, Subhadeep and Bogdanov, Andrey
and Fanni, Tiziana and Sau, Carlo and Raffo, Luigi
and Palumbo, Francesca and Regazzoni, Francesco},
title = {Adaptable AES Implementation with Power-
gating Support},
booktitle = {Proceedings of the ACM International
Conference on Computing Frontiers},
series = {CF '16},
year = {2016},
location = {Como, Italy}, pages = {331--334},
doi = {10.1145/2903150.2903488},
publisher = {ACM},
address = {New York, NY, USA},}
CF2016-May16-182016,Como(Italy)–TizianaFanni
BibTex