HSCIM: A High Security Compute-In-Memory Architecture with PUF based on TST-MRAM

With the rapid development of the Internet of Things (IOT) in the decades, compute-in-memory (CIM) architecture which addresses the Von-Neumann bottleneck are drawing significant attention with a gradually improving demand of high security. Physical unclonable function (PUF) emerges as a promising candidate attributed to its dependence on physical properties of devices instead of traditional key systems. Toggle spin torques magnetoresistive random access memory (TST-MRAM) is considered as satisfying storage technology due to its non-volatility and low power consumption. In this paper, a high security compute-in-memory (HSCIM) architecture based on TST-MRAM is proposed, aiming to generating PUF signals for encryption and guaranteeing security during computation. Simulation results show that with the proposed architecture, a 16-bit multiply-and-accumulate (MAC) operation along with data encryption and decryption can be performed within four clock cycles, achieving an efficient utilization of device resource.