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Stochastic switching and analog-state programmable memristor and its utilization for homomorphic encryption hardware

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Listed:
  • Woon Hyung Cheong

    (Korea Advanced Institute of Science and Technology (KAIST))

  • Jae Hyun In

    (Korea Advanced Institute of Science and Technology (KAIST))

  • Jae Bum Jeon

    (Korea Advanced Institute of Science and Technology (KAIST))

  • Geunyoung Kim

    (Korea Advanced Institute of Science and Technology (KAIST))

  • Kyung Min Kim

    (Korea Advanced Institute of Science and Technology (KAIST))

Abstract

Homomorphic encryption performs computations on encrypted data without decrypting, thereby eliminating security issues during the data communication between clouds and edges. As a result, there is a growing need for homomorphic encryption hardware (HE-HW) for the edges, where low power consumption and a compact form factor are desired. Here, a Pt/Ta2O5/Mo metallic cluster-type memristors (Mo-MCM) characterized by the Mo as a mobile species, and its utilization for the HE-HW via a 1-trasistor-1-memristor (1T1M) array as a prototype HE-HW is proposed. The Mo-MCM exhibits inherent stochastic set-switching behavior, which can be utilized for generating the random numbers required for encryption key generation. Furthermore, the device can accurately store analog conductance states after set-switching, which can be used as an analog non-volatile memristor. By simultaneously leveraging these two characteristics, encryption key generation, data encryption, and decryption are possible within a single device through an in-memory computing manner.

Suggested Citation

  • Woon Hyung Cheong & Jae Hyun In & Jae Bum Jeon & Geunyoung Kim & Kyung Min Kim, 2024. "Stochastic switching and analog-state programmable memristor and its utilization for homomorphic encryption hardware," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-50592-7
    DOI: 10.1038/s41467-024-50592-7
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