An Encrypted On-Chip Power Supply With Random Parallel Power Injection and Charge Recycling Against Power/EM Side-Channel Attacks

Article Engineering, Electrical & Electronic

EM and Power SCA-Resilient AES-256 Through >350x Current-Domain Signature Attenuation and Local Lower Metal Routing

Debayan Das et al.

Summary: Mathematically secure cryptographic algorithms exhibit power and electromagnetic analysis attacks when implemented physically, and circuit-level protections suffer from tradeoffs. This study introduces a new method of signature suppression in the current domain that significantly enhances immunities to power and EM side-channel analysis. By combining current-domain signature attenuation with local lower level metal routing, crucial correlated information leakage is suppressed, providing a significant improvement in security. The test results demonstrate that higher level metal layers leak significantly more compared to lower level metal routing, showcasing the effectiveness of the proposed method.

IEEE JOURNAL OF SOLID-STATE CIRCUITS (2021)

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Article Engineering, Electrical & Electronic

A 10-MHz DAB Hysteretic Control Switching Power Converter for 5G IoT Power Delivery

Kang Wei et al.

Summary: This article introduces a 10-MHz switching power converter for 5G mobile Internet-of-Things applications, utilizing DAB hysteretic control and dc resistance compensation to achieve nanosecond power flipping and improved load regulation accuracy. The controller allows for power scalable operation and adaptive power delivery, resulting in high efficiency over a wide power range. The prototype achieved a peak power density of 14.3 W/mm(2) and settling times of 247 ns/387 ns with voltage droop of 31 mV/60 mV for load transitions. The converter demonstrated excellent performance with controlled switching frequency variations and improved output regulation accuracy.

IEEE JOURNAL OF SOLID-STATE CIRCUITS (2021)

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Article Engineering, Electrical & Electronic