A high-throughput true random number generator employing dynamic hybrid jitter and metastability in XOR-XNOR circuits

True Random Number Generators (TRNGs) serve as core modules in information security, cryptographic protocols, and privacy-preserving applications. This paper proposed a high-throughput TRNG design based on the dynamic hybrid jitter and metastability of XOR-XNOR logic. The proposed TRNG leverages the nonlinear characteristics of XOR-XNOR gates to effectively combine jitter noise and metastability phenomena, thereby generating highly unpredictable random signals. Notably, the implemented TRNG consumes only 22 LUTs and 8 DFFs on a Zynq-7010 development board while achieving a throughput of 460 Mbps. The generated random sequences have successfully passed the NIST SP 800–22, TESTU01, NIST SP 800–90B, and AIS-31 statistical test suites.