An Energy-Efficient Reconfigurable DTLS Cryptographic Engine for Securing Internet-of-Things Applications
Abstract
This paper presents the first hardware implementation of the Datagram Transport Layer Security (DTLS) protocol to enable end-to-end security for the Internet of Things (IoT). A key component of this design is a reconfigurable prime field elliptic curve cryptography (ECC) accelerator, which is 238x and 9x more energy-efficient compared to software and state-of-the-art hardware respectively. Our full hardware implementation of the DTLS 1.3 protocol provides 438x improvement in energy-efficiency over software, along with code size and data memory usage as low as 8 KB and 3 KB respectively. The cryptographic accelerators are coupled with an on-chip low-power RISC-V processor to benchmark applications beyond DTLS with up to two orders of magnitude energy savings. The test chip, fabricated in 65 nm CMOS, demonstrates hardware-accelerated DTLS sessions while consuming 44.08 uJ per handshake, and 0.89 nJ per byte of encrypted data at 16 MHz and 0.8 V.
- Publication:
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IEEE Journal of Solid-State Circuits
- Pub Date:
- August 2019
- DOI:
- 10.1109/JSSC.2019.2915203
- arXiv:
- arXiv:1907.04455
- Bibcode:
- 2019IJSSC..54.2339B
- Keywords:
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- Computer Science - Cryptography and Security
- E-Print:
- Published in IEEE Journal of Solid-State Circuits (JSSC)