首页/论文/2001.06724

arXiv 2001.067242020-01-18cs.CR

DynUnlock: Unlocking Scan Chains Obfuscated using Dynamic Keys

Nimisha Limaye, Ozgur Sinanoglu

备注：: Accepted at Design, Automation and Test in Europe Conference (DATE) 2020

英文摘要：

Outsourcing in semiconductor industry opened up venues for faster and cost-effective chip manufacturing. However, this also introduced untrusted entities with malicious intent, to steal intellectual property (IP), overproduce the circuits, insert hardware Trojans, or counterfeit the chips. Recently, a defense is proposed to obfuscate the scan access based on a dynamic key that is initially generated from a secret key but changes in every clock cycle. This defense can be considered as the most rigorous defense among all the scan locking techniques. In this paper, we propose an attack that remodels this defense into one that can be broken by the SAT attack, while we also note that our attack can be adjusted to break other less rigorous (key that is updated less frequently) scan locking techniques as well.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

阅读原文

阅读 PDF ↗

arXiv 页面 ↗HTML 原文 ↗

本文内容

英文摘要相关论文

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

继续探索

相关论文

Intrinsically Reliable and Lightweight Physical Obfuscated Keys

Physical Obfuscated Keys (POKs) allow tamper-resistant storage of random keys based on physical disorder. The output bits of current POK designs need to be first corrected due to measurement noise and next de-correlated since the original output bits may not be i.i.d. (independent and identically distributed) and also public helper information for error correction necessarily correlates the corrected output bits.For this reason, current designs include an interface for error correction and/or output reinforcement, and privacy amplification for compressing the corrected output to a uniform rand…

2017-03-21cs.CR

Threshold-based Obfuscated Keys with Quantifiable Security against Invasive Readout

Advances in reverse engineering make it challenging to deploy any on-chip information in a way that is hidden from a determined attacker. A variety of techniques have been proposed for design obfuscation including look-alike cells in which functionality is determined by hard to observe mechanisms including dummy vias or transistor threshold voltages. Threshold-based obfuscation is especially promising because threshold voltages cannot be observed optically and require more sophisticated measurements by the attacker. In this work, we demonstrate the effectiveness of a methodology that applies t…

2017-10-25cs.CR

PILOT: Password and PIN Information Leakage from Obfuscated Typing Videos

This paper studies leakage of user passwords and PINs based on observations of typing feedback on screens or from projectors in the form of masked characters that indicate keystrokes. To this end, we developed an attack called Password and Pin Information Leakage from Obfuscated Typing Videos (PILOT). Our attack extracts inter-keystroke timing information from videos of password masking characters displayed when users type their password on a computer, or their PIN at an ATM. We conducted several experiments in various attack scenarios. Results indicate that, while in some cases leakage is min…

2019-04-09cs.CR

NeuroUnlock: Unlocking the Architecture of Obfuscated Deep Neural Networks

Technische Universität Wien（维也纳工业大学）；New York University Abu Dhabi（纽约大学阿布扎比分校）

The advancements of deep neural networks (DNNs) have led to their deployment in diverse settings, including safety and security-critical applications. As a result, the characteristics of these models have become sensitive intellectual properties that require protection from malicious users. Extracting the architecture of a DNN through leaky side-channels (e.g., memory access) allows adversaries to (i) clone the model, and (ii) craft adversarial attacks. DNN obfuscation thwarts side-channel-based architecture stealing (SCAS) attacks by altering the run-time traces of a given DNN while preservin…

2022-06-01cs.CRcs.LG

Hidden in Plain Sight: Obfuscated Strings Threatening Your Privacy

String obfuscation is an established technique used by proprietary, closed-source applications to protect intellectual property. Furthermore, it is also frequently used to hide spyware or malware in applications. In both cases, the techniques range from bit-manipulation over XOR operations to AES encryption. However, string obfuscation techniques/tools suffer from one shared weakness: They generally have to embed the necessary logic to deobfuscate strings into the app code. In this paper, we show that most of the string obfuscation techniques found in malicious and benign applications for Andr…

2020-09-09cs.CR

Attack of the Genes: Finding Keys and Parameters of Locked Analog ICs Using Genetic Algorithm

Hardware intellectual property (IP) theft is a major issue in today's globalized supply chain. To address it, numerous logic locking and obfuscation techniques have been proposed. While locking initially focused on digital integrated circuits (ICs), there have been recent attempts to extend it to analog ICs, which are easier to reverse engineer and to copy than digital ICs. In this paper, we use algorithms based on evolutionary strategies to investigate the security of analog obfuscation/locking techniques. We present a genetic algorithm (GA) approach which is capable of completely breaking a …

2020-03-31cs.CRcs.NE

更多相关论文收起更多论文

ScanSAT: Unlocking Static and Dynamic Scan Obfuscation

While financially advantageous, outsourcing key steps, such as testing, to potentially untrusted Outsourced Assembly and Test (OSAT) companies may pose a risk of compromising on-chip assets. Obfuscation of scan chains is a technique that hides the actual scan data from the untrusted testers; logic inserted between the scan cells, driven by a secret key, hides the transformation functions that map the scan-in stimulus (scan-out response) and the delivered scan pattern (captured response). While static scan obfuscation utilizes the same secret key, and thus, the same secret transformation functi…

2019-09-10cs.CR

解锁未来：基于云的人工智能门禁系统

Unlocking the Future: A Cloud-Based Artificial Intelligence Access Control System

本文提出基于 Raspberry Pi 和 AWS 云服务的 AWSecure Entry System 门禁方案，以增强安全性、简化认证并提升运营效率。

2024-11-06cs.CR

KeyMemRT 编译器和运行时：解锁内存可扩展的全同态加密

KeyMemRT Compiler and Runtime: Unlocking Memory-Scalable FHE

University of Edinburgh（爱丁堡大学）

KeyMemRT通过自动密钥管理和数据流分析，降低FHE内存消耗并提升运行效率。

2026-01-26cs.CRcs.PF

MuxLink: Circumventing Learning-Resilient MUX-Locking Using Graph Neural Network-based Link Prediction

Logic locking has received considerable interest as a prominent technique for protecting the design intellectual property from untrusted entities, especially the foundry. Recently, machine learning (ML)-based attacks have questioned the security guarantees of logic locking, and have demonstrated considerable success in deciphering the secret key without relying on an oracle, hence, proving to be very useful for an adversary in the fab. Such ML-based attacks have triggered the development of learning-resilient locking techniques. The most advanced state-of-the-art deceptive MUX-based locking (D…

2021-12-14cs.CR