International Association for Cryptologic Research

Ph.D. Database

The aim of the IACR Ph.D. database is twofold. On the first hand, we want to offer an overview of Ph.D. already completed in the domain of cryptology. Where possible, this should also include a subject classification, an abstract, and access to the full text. On the second hand, it deals with Ph.D. subjects currently under investigation. This way, we provide a timely map of contemporary research in cryptology. All entries or changes need to be approved by an editor. You can contact them via phds (at)


Sumanta Chaudhuri (#538)
Name Sumanta Chaudhuri
Personal Homepage
Topic of his/her doctorate. Asynchronous FPGA Architectures for Cryptographic Applications
Category implementation
Keywords cryptanalysis,smart cards
Ph.D. Supervisor(s) Jean-Luc Danger, Sylvain Guilley
Year of completion 2009
Abstract Cryptography is a mean to defend against potential attackers, notably to protect confidentiality, integrity or secure authentication, whereas cryptanalysis is about the challenge to retrieve hidden information. No known mathematical cryptanalysis method can decrypt modern cryptographic algorithms such as AES, DES. But the leakage of information related to the workings of these machines, or manipulation of these machines to find the secret key has become a powerful means of cryptanalysis. These attacks are known as "Side-Channel Attacks". This thesis attempts to find answers to the following questions:
  1. Is there an architecture whose information leakage does not allow the attacker to recover the key faster than the case where there is no leakage?
  2. To what extent are these leakages tolerable, and how can we maximize the use of these machines without compromising their secret?
  3. What are the metrics to determine the vulnerability of electronic circuits facing a multitude of ways to attack?
Recently numerous researchers have asked these questions for the various categories of electronic circuits. In this thesis we restrict our research space to FPGAs and Asynchronous Circuits. The main advantage of FPGAs is their reconfigurability, which can be used to adapt the algorithm against an attack. Asynchronous circuits have good properties such as tolerance to fault, the decorrelation of power consumption and computation, which are useful against Side-Channel Attacks.
E-Mail Address sumanta.chaudhuri (at)
Last Change 2011-05-07 09:48:32
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