@misc{rfc9958, series = {Request for Comments}, number = 9958, howpublished = {RFC 9958}, publisher = {RFC Editor}, doi = {10.17487/RFC9958}, url = {https://www.rfc-editor.org/info/rfc9958/}, author = {A. Banerjee and T. Reddy.K and D. Schoinianakis and T. Hollebeek and M. Ounsworth}, title = {{Post-Quantum Cryptography for Engineers}}, pagetotal = 42, year = 2026, month = jun, abstract = {The advent of a cryptographically relevant quantum computer (CRQC) would render state-of-the-art, traditional public key algorithms deployed today obsolete, as the mathematical assumptions underpinning their security would no longer hold. To address this, protocols and infrastructure must transition to post-quantum algorithms, which are designed to resist both traditional and quantum attacks. This document explains why engineers need to be aware of and understand post-quantum cryptography (PQC), and it details the impact of CRQCs on existing systems and the challenges involved in transitioning to post-quantum algorithms. Unlike previous cryptographic updates, this shift may require significant protocol redesign due to the unique properties of post-quantum algorithms.}, }