A Unified Cryptoprocessor for Lattice-Based Signature and Key-Exchange

We propose design methodologies for building a compact, unified and programmable cryptoprocessor architecture that computes post-quantum key agreement digital signature. Synergies in the two types of cryptographic primitives are used to make compact. As case study, has been optimized targeting signature scheme ’CRYSTALS-Dilithium’ encapsulation mechanism (KEM) ’Saber,’ both finalists NIST's cryptography standardization project. The executes generations, encapsulations, decapsulations, verifications all security levels Dilithium Saber. On Xilinx Ultrascale+ FPGA, proposed consumes 18,406 LUTs, 9,323 FFs, 4 DSPs, 24 BRAMs. It achieves 200 MHz clock frequency finishes CCA-secure key-generation/encapsulation/decapsulation operations LightSaber 29.6/40.4/ 58.3 $\mu$ s; Saber 54.9/69.7/94.9 FireSaber 87.6/108.0/139.4 s, respectively. key-generation/sign/verify Dilithium-2 70.9/151.6/75.2 Dilithium-3 114.7/237/127.6 Dilithium-5 194.2/342.1/228.9 respectively, best-case scenario. UMC 65 nm library ASIC latency is improved by factor due 2× increase frequency.