Suh

Bio: Suh is an academic researcher. The author has contributed to research in topic(s): Message authentication code & Key generation. The author has an hindex of 1, co-authored 1 publication(s) receiving 1721 citation(s).

Physical Unclonable Functions and Applications: A Tutorial

Abstract: This paper describes the use of physical unclonable functions (PUFs) in low-cost authentication and key generation applications. First, it motivates the use of PUFs versus conventional secure nonvolatile memories and defines the two primary PUF types: “strong PUFs” and “weak PUFs.” It describes strong PUF implementations and their use for low-cost authentication. After this description, the paper covers both attacks and protocols to address errors. Next, the paper covers weak PUF implementations and their use in key generation applications. It covers error-correction schemes such as pattern matching and index-based coding. Finally, this paper reviews several emerging concepts in PUF technologies such as public model PUFs and new PUF implementation technologies.

EPIC: ending piracy of integrated circuits

Abstract: As semiconductor manufacturing requires greater capital investments, the use of contract foundries has grown dramatically, increasing exposure to mask theft and unauthorized excess production. While only recently studied, IC piracy has now become a major challenge for the electronics and defense industries [6].We propose a novel comprehensive technique to end piracy of integrated circuits (EPIC). It requires that every chip be activated with an external key, which can only be generated by the holder of IP rights, and cannot be duplicated. EPIC is based on (i) automatically-generated chip IDs, (ii) a novel combinational locking algorithm, and (iii) innovative use of public-key cryptography. Our evaluation suggests that the overhead of EPIC on circuit delay and power is negligible, and the standard flows for verification and test do not require change. In fact, major required components have already been integrated into several chips in production. We also use formal methods to evaluate combinational locking and computational attacks. A comprehensive protocol analysis concludes that EPIC is surprisingly resistant to various piracy attempts.

Physically Unclonable Functions: A Study on the State of the Art and Future Research Directions

Abstract: The idea of using intrinsic random physical features to identify objects, systems, and people is not new. Fingerprint identification of humans dates at least back to the nineteenth century [21] and led to the field of biometrics. In the 1980s and 1990s of the twentieth century, random patterns in paper and optical tokens were used for unique identification of currency notes and strategic arms [2, 8, 53]. A formalization of this concept was introduced in the very beginning of the twenty-first century, first as physical one-way functions [41, 42], physical random functions [13], and finally as physical(ly) unclonable functions or PUFs.1 In the years following this introduction, an increasing number of new types of PUFs were proposed, with a tendency toward more integrated constructions. The practical relevance of PUFs for security applications was recognized from the start, with a special focus on the promising properties of physical unclonability and tamper evidence.

Fault Analysis-Based Logic Encryption

Abstract: Globalization of the integrated circuit (IC) design industry is making it easy for rogue elements in the supply chain to pirate ICs, overbuild ICs, and insert hardware Trojans. Due to supply chain attacks, the IC industry is losing approximately $4 billion annually. One way to protect ICs from these attacks is to encrypt the design by inserting additional gates such that correct outputs are produced only when specific inputs are applied to these gates. The state-of-the-art logic encryption technique inserts gates randomly into the design, but does not necessarily ensure that wrong keys corrupt the outputs. Our technique ensures that wrong keys corrupt the outputs. We relate logic encryption to fault propagation analysis in IC testing and develop a fault analysis-based logic encryption technique. This technique enables a designer to controllably corrupt the outputs. Specifically, to maximize the ambiguity for an attacker, this technique targets 50% Hamming distance between the correct and wrong outputs (ideal case) when a wrong key is applied. Furthermore, this 50% Hamming distance target is achieved using a smaller number of additional gates when compared to random logic encryption.