An enhanced-security buck DC-DC converter with true-random-number-based pseudo hysteresis controller for internet-of-everything (IoE) Devices

Yang, Wei‐Pang; Chu, Li-Cheng; Yang, Shang-Hsien; Lai, Yan-Jiun; Chen, Shao-Qi; Chen, Ke-Horng; Lin, Ying-Hsi; Lin, Shian-Ru; Tsai, Tsung-Yen

doi:10.1109/isscc.2018.8310216

Cited by 16 publications

(4 citation statements)

References 3 publications

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“…In [96], authors analyze the DPA resilience of FinFET cryptocircuits and design a 4-bit substitution box (Sbox-4) of PRIDE algorithm for new devices to be used in low-power applications. Besides, in [97], the authors presented a security countermeasure based on switching DC-DC regulators.…”

Section: Power-monitoring Scamentioning

confidence: 99%

A review of security issues and solutions for precision health in Internet-of-Medical-Things systems

et al. 2023

Security and Safety

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Precision medicine provides a holistic view of a person’s health that combines genes, environment and lifestyle, aiming at realizing the individualized therapy. With the developing of Internet of Things (IOT) devices, widespread emergence of Electronic Medical Records (EMR), booming of cloud computing and artificial intelligence, it provides an opportunity to collect the healthcare big data throughout the lifespan and analyze the disease risk at all stages of life. Thus, precision medicine is shifting to the focus from treatment to prediction and prevention, namely precision health. To achieve this goal, different types of data, such as omics, imaging, EMR, continuous physiological monitoring, lifestyle, and environmental information need to be collected, tracked, managed and shared. For this purpose, Internet-of-Medical Things (IoMT) is playing a vital role in bringing together the health systems, applications, services and devices, that can improve the speed and accuracy of diagnosis and treatments, and monitor and modify patient behaviour and health status in real time. However, due to the proliferation of IoMT devices, security has become a growing concern. The increasing interconnectivity of IoMT-enabled devices with the health data reception, transmission, and processing significantly increases the number of potential vulnerabilities within a system. To address the security issues for precision health in IoMT systems, in this article, we review the state-of-the-art techniques and schemes from the perspective of a hierarchical system architecture. We present an IoMT system model consisting of three layers: the sensing layer, the network layer and the cloud infrastructure layer. In each layer, we discuss the security vulnerabilities and threats, and review the existing security techniques and schemes corresponding to the system components and their functionalities. Due to the unique nature of biometric features in medical and health services, we highlight the biometrics-based technologies applied in IoMT systems, which makes a great difference from the security solutions in other existing IoT systems. Finally, we summarize the challenges and future research directions in IoMT systems for a better and more secure future of precision health.

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Section: Power-monitoring Scamentioning

confidence: 99%

A review of security issues and solutions for precision health in Internet-of-Medical-Things systems

et al. 2023

Security and Safety

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“…Discrete RSSM technology is implemented digitally. A clock generator covering N discrete modulation frequencies is applied to make the operating frequency of the circuit jump from

f_{\text{sw}1}

f_{\text{swn}}

randomly [45, 46]. A large N is necessary to achieve obvious EMI reduction, leading to a significant increase in chip area and power consumption.…”

Section: Emi Mitigation From Emi Sourcesmentioning

confidence: 99%

A review on recent effort of conductive EMI suppression methods in high‐frequency power converters

Xu³

et al. 2022

IET Power Electronics

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High‐frequency power converters with high switching frequency and compact layout are characterised by high power density and high efficiency, which is superior to conventional converters in many aspects. However, the management of electromagnetic interference (EMI) is a significant limitation for their widespread application. Recent conductive EMI suppression methods are reviewed in this paper. The mechanisms and characteristics of the reviewed methods are discussed in detail. Then, the EMI attenuation of the mentioned methods is compared from the perspective of attenuation band, attenuation amplitude, and cost respectively. It is demonstrated that both the source and the propagation path have a significant impact on EMI problems in performance of high‐frequency power converters. Several suggestions can be proposed based on the reviewed researches. Firstly, both the potential matching method and the balance winding method in transformer design can achieve a significant EMI reduction at all frequencies within the frequency range of conducted EMI. Secondly, spread‐spectrum modulation techniques are suggested to be applied in MHz converters instead of constant frequency control. Thirdly, the reviewed gate driver optimisation methods have a remarkable EMI suppression effect at high frequencies and still work for the suppression of radiated EMI. Finally, filters can have a reduced volume if the reviewed methods are applied.

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“…Randomized SSM (RSSM) can outperform PSSM, with lower peak EMI and near-uniform noise spreading, but its performance highly relies on the random clock design. In (Yang et al, 2018), an N-bit digital random clock was reported to achieve discrete RSSM (D-RSSM). However, the bit number N has to be large in order to achieve satisfying EMI attenuation, significantly increasing circuit complexity, chip area and power consumption.…”

Section: Gate Driver For Gan In Literaturementioning

confidence: 99%

A High Voltage Multi-Purpose On-the-fly Reconfigurable Half-Bridge Gate Driver for GaN HEMTs in 0.18-μm HV SOI CMOS Technology

Aimaier²,

Alameh

et al. 2020

2020 18th IEEE International New Circuits and Systems Conference (NEWCAS)

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En raison de vitesses de commutation plus élevées, de faible résistance à l'état passant et de taille miniaturisée en comparaison avec des contreparties en silicium, l'utilisation de transistors de puissance à base de nitrure de gallium (GaN) est de plus en plus courante dans les circuits de puissances modernes. Avec des figures de mérite supérieures, les convertisseurs de puissance utilisant des dispositifs GaN peuvent fonctionner à des fréquences de commutation élevées. Cela se traduit par des dimensions plus petites, une efficacité supérieure et une réduction du coût du système. La redondance et la reconfigurabilité sont souhaitables dans les applications critiques pour la sécurité telles que les systèmes automobiles et aérospatiaux. Ces derniers fonctionnent dans des conditions difficiles nécessitant un niveau élevé de flexibilité et une grande fiabilité. Ce mémoire présente un circuit de pilotage de grille pour un tel système d'alimentation reconfigurable. Destiné à être au coeur d'un système d'alimentation haute tension (HT) programmable et flexible, le pilote de grille présenté dans ce travail est capable de commander une large gamme de dispositifs GaN de différentes tailles. Cela est accompli en ayant un mécanisme configurable de vitesse de mis-à-on et mis-à-off. Cette fonctionnalité élimine le besoin de résistances de grille discrètes. Elle permet donc des conceptions de circuits plus denses, telles que l'intégration de système dans un boîtier (SiP-system-in-package). Dans un tel système les pilotes de grille, les dispositifs GaN et d'autres circuits intégrés de commande sont placés sur le même interposeur. La vitesse configurable de mis-à-on et de mis-à-off reconfigurable permet également de réduire les interférences électromagnétiques (EMI). Cela est important dans les applications critiques pour la sécurité. Une structure uniforme d'unités de commutation en demi-pont est proposée. Cette dernière permet une reconfigurabilité du fonctionnement du système avec une variété de topologies possibles à l'aide d'un grand nombre de cellules de commutation. Le pilote de grille exige un circuit de décalage de niveau de 200 V intégré. Ce circuit utilise une technique d'annulation de bruit en mode commun, ayant fait l'objet d'une étude approfondie. En utilisant cette technique dans une technologie HT SOI (silicium sur isolant), une immunité à une variation de bruit (CMTI) de 80 V/ns est obtenue. Le pilote de grille a un temps mort configurable allant de 5 ns à 60 ns. Ce temps mort configurable minimise les pertes dues à la conduction par mécanisme de «diode de corps» des transistors GaN pendant la période de conduction en roue libre pour différents profils de charge. Toutes les configurations sont programmées à travers un registre à décalage. Le circuit de pilotage de grille a été fabriqué avec le procédé SOI de 200-V 0,18-μm (XFAB XT018). Les résultats expérimentaux montrent que la puce peut piloter les transistors GaN ciblés de la plus petite à la plus grande taille aux vitesses de mis-à-on et mis-à-off souhaitée...

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An enhanced-security buck DC-DC converter with true-random-number-based pseudo hysteresis controller for internet-of-everything (IoE) Devices

Cited by 16 publications

References 3 publications

A review of security issues and solutions for precision health in Internet-of-Medical-Things systems

A review of security issues and solutions for precision health in Internet-of-Medical-Things systems

A review on recent effort of conductive EMI suppression methods in high‐frequency power converters

A High Voltage Multi-Purpose On-the-fly Reconfigurable Half-Bridge Gate Driver for GaN HEMTs in 0.18-μm HV SOI CMOS Technology

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