Algorithms Built to Prevent Future Quantum Attacks: Post-Quantum Cryptography in Preparation for Quantum Computing Threats

Traditional cryptographic systems that are based on algorithms such as RSA, ECC, and DH are becoming increasingly vulnerable to quantum-based attacks. This is especially the case attributable to algorithms such as Shor’s, which are able to factor large integers and solve discrete logarithms in an efficient manner. There has been a rapid advancement in quantum computing. There is a significant risk to the integrity, confidentiality, and security of the data that a result of this. Cryptographic algorithms that are immune to both classical and quantum attacks are the goal of post-quantum cryptography, often known as PQC. The purpose of this study is to investigate a variety of post-quantum algorithms, including lattice-based, hash-based, code-based, multivariate, and isogeny-based cryptography, and to evaluate the possibility of these algorithms to successfully defend against future quantum attacks. Within the context of real-world applications, we dissect the security assumptions, performance indicators, and issues that these algorithms present. In addition to this, we investigate the current efforts that are being made to standardize PQC through projects such as the NIST post-quantum cryptography work. In order to ensure the safety of data over the long term, this study offers some insights into the process of developing cryptographic methods that are durable in preparation for the era of quantum computing.