In brief - Cloudflare aims to make its platform fully post-quantum secure by 2029. - New quantum research is compressing security timelines across the tech industry. - The same cryptographic math protects internet authentication and Bitcoin signatures. Cloudflare says it plans to make its entire platform resistant to quantum computing attacks by 2029, accelerating efforts to replace internet cryptography that powerful quantum machines could eventually break. In a blog post on Tuesday, the web infrastructure company said it is prioritizing post-quantum authentication, warning that compromised authentication keys could allow attackers to impersonate servers, access systems, or distribute malicious software updates. “The migration to post-quantum authentication is more complex than the transition for encryption because it involves more steps,” Sharon Goldberg, senior director of product management at Cloudflare, told Decrypt. “With post-quantum encryption upgrades to TLS, we only need to upgrade the TLS client and the TLS server.” Transport Layer Security, or TLS, is the cryptographic protocol that secures internet connections between clients and servers, protecting data exchanged by websites, applications, and online services. Cloudflare’s timeline reflects growing concern of ‘Q-Day,’ the theoretical yet increasingly plausible day when a practical quantum computer comes online. While experts once placed Q-Day decades away, new research, including by IBM and Google, puts the date closer to 2032. “Our decision to accelerate our post-quantum roadmap–especially authentication–was triggered by recent breakthroughs in quantum computing, along with Google now also targeting 2029 for a full rollout of post-quantum authentication,” Goldberg said. Cloudflare’s post echoed an announcement last month by Google, which said it plans to be quantum-resistant by 2029, which the company said helped trigger the accelerated timeline. “All of this suggests that Q-Day might come sooner than expected,” warning that after Q-Day, an adversary armed with a quantum computer could break into any system not protected