All‐in‐One Compression and Encryption Engine Based on Flexible Polyimide Memristor

It is anticipated that the rapid development of the Internet of Things (IoT) will improve the quality of human life. Nonetheless, large amounts of data need to be replicated, stored, processed, and shared, posing formidable challenges to communication bandwidth and information security. Herein, it is reported that polyimide (PI) threshold‐switching memristors exhibit Gaussian conductance and randomly set voltage distribution with nonideal properties to create a compression and encryption engine with a single chip. The Gaussian conductance distribution is used to achieve compressed sensing (CS) to integrate encryption into compression, and the spontaneous formation of the one‐time‐sampling measurement matrix satisfies absolute security. Moreover, the bitstreams generated by randomly distributed set voltages are used to diffuse the ciphertext from CS to improve security. The engine is shown to be secure even if the eavesdropper knows both the plaintext and the corresponding ciphertext. It has compression performance advantages that take both efficiency and security into account. In addition, due to the superior high temperature and mechanical properties of PI, the engine can continue to function normally in harsh environments. Herein, an excellent solution is offered for ensuring the efficiency and security of IoT. All‐in‐one compression and encryption engines with one‐time‐only keys constructed from flexible polyimide memristors are achieved, enabling the integration of compression and encryption. The one‐time‐only keys are formed spontaneously to implement compression and diffusion without programming operations, enabling the engine to satisfy perfect security and resist chosen‐plaintext attacks (CPA). An excellent solution is provided for high efficiency and security application.