Post-Quantum Cryptography Hardware is specialized hardware implementations of quantum-resistant cryptographic algorithms designed for deployment in future quantum-computing-threatened environments — Post-quantum cryptography addresses vulnerabilities of current RSA and ECC algorithms to quantum computers through Shor's algorithm, requiring hardware supporting lattice-based, hash-based, and multivariate polynomial cryptography. Lattice-Based Cryptography implements algorithms like Learning with Errors (LWE) and Ring-LWE, requiring polynomial arithmetic over lattice structures, matrix-vector operations, and modular arithmetic on large integers. Hardware Acceleration targets computationally intensive polynomial multiplication implementing through number-theoretic transform (NTT) algorithms, specialized multiply-accumulate units for matrix operations, and pipelined modular reduction circuits. Key Exchange Implementation synthesizes algorithms like Kyber requiring multiple NTT transforms, modular arithmetic chains, and polynomial sampling from distributions, enabling frequent key exchange operations. Digital Signature Hardware implements Dilithium and SPHINCS algorithms requiring polynomial operations, hash-based tree structures, and rejection sampling for signature generation. Memory Architecture manages large polynomial coefficients, intermediate results, and sampled noise values, utilizing distributed memory and bandwidth optimization. Side-Channel Protection applies masking, constant-time implementation, and blinding to prevent power and timing analysis attacks revealing cryptographic secrets. Standards Compliance implements NIST-standardized algorithms (Kyber, Dilithium) ensuring interoperability and long-term viability. Post-Quantum Cryptography Hardware prepares infrastructure for quantum-safe cryptographic transitions.