scope:

This technical report provides information about quantum computers and post-quantum cryptography for people working in the financial services industry. In particular, this report investigates how a large-scale quantum computer could impact the security of commonly used protocols within the CMS and makes recommendations to mitigate those impacts.

This report achieves its goal by first discussing the basics of quantum computers and the quantum algorithms that break classical cryptography, and then shows how those algorithms could be used to attack classical cryptosystems. Moreover, this report provides a basic background in each of the main branches of mathematics which are thought to yield quantum-safe cryptographic schemes.