Woo Kyung Seok, Han Janguk, Yi Su-In, Thomas Luke, Park Hyungjun, Kumar Suhas, Hwang Cheol Seong
Department of Materials Science and Engineering and Inter-University Semiconductor Research Center, Seoul National University, Gwanak-ro 1, Daehag-dong, Gwanak-gu, Seoul, Republic of Korea.
Sandia National Laboratories, Livermore, CA, USA.
Nat Commun. 2024 Apr 15;15(1):3245. doi: 10.1038/s41467-024-47488-x.
Information security and computing, two critical technological challenges for post-digital computation, pose opposing requirements - security (encryption) requires a source of unpredictability, while computing generally requires predictability. Each of these contrasting requirements presently necessitates distinct conventional Si-based hardware units with power-hungry overheads. This work demonstrates CuTe/HfO ('CuTeHO') ion-migration-driven memristors that satisfy the contrasting requirements. Under specific operating biases, CuTeHO memristors generate truly random and physically unclonable functions, while under other biases, they perform universal Boolean logic. Using these computing primitives, this work experimentally demonstrates a single system that performs cryptographic key generation, universal Boolean logic operations, and encryption/decryption. Circuit-based calculations reveal the energy and latency advantages of the CuTeHO memristors in these operations. This work illustrates the functional flexibility of memristors in implementing operations with varying component-level requirements.
信息安全与计算是后数字计算面临的两个关键技术挑战，它们提出了相互对立的要求——安全（加密）需要不可预测性的来源，而计算通常需要可预测性。目前，这些相互矛盾的要求中的每一个都需要不同的基于硅的传统硬件单元，且这些硬件单元功耗巨大。这项工作展示了满足这些相互矛盾要求的CuTe/HfO（“CuTeHO”）离子迁移驱动忆阻器。在特定的工作偏压下，CuTeHO忆阻器生成真正随机且物理上不可克隆的函数，而在其他偏压下，它们执行通用布尔逻辑。利用这些计算原语，这项工作通过实验展示了一个执行加密密钥生成、通用布尔逻辑运算以及加密/解密的单一系统。基于电路的计算揭示了CuTeHO忆阻器在这些操作中的能量和延迟优势。这项工作说明了忆阻器在实现具有不同组件级要求的操作方面的功能灵活性。
