In Situ Encryption: Cryptographic Key Generation and In Situ Encryption in One‐Transistor‐One‐Resistor Memristors for Hardware Security (Adv. Electron. Mater. 5/2021)

The physical unclonable function (PUF) is a promising security primitive that exploits the intrinsic random variations in electronic hardware to produce digital keys. The subthreshold slope (S.S) variations of the transistors can be utilized as the entropy source of the PUF to generate the physical keys, as shown by Yi Li, Xiangshui Miao, and co-workers in article number 2001182. By combining this S.S PUF with memristor-based XOR logic function, security, memory, and computing can be realized on the same device.