Quantum Computing Security 2022 - Recent advances in quantum computing have highlighted the vulnerabilities in contemporary RSA encryption. Shor’s approach for factoring numbers is becoming more tractable as quantum computing advances. This jeopardizes the security of any cryptographic system that is based on the complexity of factorisation. Many other crypto-systems based on theories like Elliptic Curve Cryptography are also vulnerable. To keep a cryptographic system safe against a quantum adversary, we must develop approaches based on a hard mathematical problem that is not vulnerable to quantum computer attacks, and we must develop Post Quantum Cryptography (PQC). One potential option is the use of lattices in a system called ring Learning with Errors (rLWE). Several techniques for postquantum encryption have been submitted to NIST. This paper studies the different speeds of different lattice-based protocols.