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

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 a...

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Bibliographic Details
Published in:Nature communications 2024-07, Vol.15 (1), p.6318-9, Article 6318
Main Authors: Cheong, Woon Hyung, In, Jae Hyun, Jeon, Jae Bum, Kim, Geunyoung, Kim, Kyung Min
Format: Article
Language:English
Subjects:
142/126
639/166/987
639/301/1005/1007
Arrays
Communication
Cybersecurity
Data communication
Data encryption
Edge computing
Encryption
Form factors
Hardware
Humanities and Social Sciences
Memristors
multidisciplinary
Power consumption
Prototypes
Random numbers
Science
Science (multidisciplinary)
Stochasticity
Switching
Tantalum
Tantalum oxides
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Summary: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/Ta 2 O 5 /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. Homomorphic encryption contributes to eliminating security issues during the data communication for edge computing. Here, the authors propose a 1-trasistor−1-memristor array as a homomorphic encryption hardware prototype. By leveraging the stochastic set-switching behavior and analog non-volatile properties of the memristor, the complete homomorphic communication process is demonstrated.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-024-50592-7