My name is Estuardo and I am a Postdoc at the department of Mathematics and Systems Analysis at Aalto University in Finland. I recently obtained my PhD under the supervision of Chris Brzuska, co-advised by Wil Michiels. My research focuses on definitional studies for white-box cryptography, as well as on the design of automated attacks on white-box cryptographic implementations. Before, I was an employee at the Leibniz Institute for High Performance Microelectronics IHP, where I worked on the design and implementation of hardware accelerators for elliptic curve cryptography in the light of side channel analysis attacks.
I've also collaborated as a teaching assistant at the Cryptography course at Aalto University and at the Introduction to Security course at TU Hamburg.
Below you'll find a list of my publications, internships and further research activities from recent years.
Publications
- Security Reductions for White-Box Key-Storage in Mobile Payments with Chris Brzuska, Marc Fischlin, Christian Janson and Wil Michiels
ASIACRYPT 2020 [Slides] [YouTube]
- Security Assessment of White-Box Design Submissions of the CHES 2017 CTF Challenge with Alexander Treff
COSADE 2020 [Slides]
- On the Security Goals of White-Box Cryptography with Alessandro Amadori, Chris Brzuska and Wil Michiels
TCHES 2020 [Slides] [YouTube]
- White-Box Cryptography: Don't Forget About Grey Box Attacks with Joppe W. Bos, Chris Brzuska, Charles Hubain, Wil Michiels, Cristofaro Mune, Eloi Sanfelix Gonzalez, Philippe Teuwen and Alexander Treff
Journal of Cryptology 2019
- Doubly half-injective PRGs for incompressible white-box cryptography with Alessandro Amadori, Joppe W. Bos, Chris Brzuska and Wil Michiels
CT-RSA 2019 [Slides]
- On the Ineffectiveness of Internal Encodings - Revisiting the DCA Attack on White-Box Cryptography with Chris Brzuska, Wil Michiels and Alexander Treff
ACNS 2018 [Slides] [YouTube]
- Increasing the Robustness of the Montgomery kP-Algorithm against SCA by Modifying its Initialization with Zoya Dyka and Peter Langendoerfer
SECITC 2016 [Slides]
- Inherent Resistance of Efficient ECC Designs against SCA Attacks with Zoya Dyka, Ievgen Kabin and Peter Langendoerfer
NTMS 2016
Visits and Internships
- Visa Research in Palo Alto, California
3 month internship under the supervission of Gaven Watson and in collaboration with Shashank Agrawal and Yilei Chen
February - May 2020
- TU Eindhoven, Netherlands
Research visit to Wil Michiels and Alessandro Amadori at the department of Mathematics and Computer Science and Embedded Networked Systems at Eindhoven University of Technology
January - March 2017
Peer Reviewing
- Reviewed papers for :
- ASIACRYPT 2018
- CHES 2018, 2021
- CTRSA 2018, 2020, 2021
- EUROCRYPT 2018
- INDOCRYPT 2018
Theses
- On the Foundations of White-Box Cryptography
PhD Thesis
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estuardo [dot] alpirezbock [at] aalto [dot] fi
📍Department of Mathematics and Systems Analysis
Aalto University
Otakaari 1
Espoo
Finland