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The confidentiality of modern communication and storage is highly dependent on cryptographic algorithms such as encryptions and digital signature schemes. The development of quantum computers continues to progress. In the future, large-scale universal quantum computers are able to crack all todays’ public-key cryptosystems. A few national-level intelligence units have begun to store large amounts of ciphertexts from other countries, waiting for quantum computers to mature and conduct decryptions. In order to resist the threat posed by quantum computing, PQC (Post-Quantum Cryptography) has emerged. PQC is based on mathematics and can use existing computer and network architectures without additional infrastructure. Using PQC to keep data secret can resist quantum cryptanalysis.