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How Let's Encrypt made the internet safer and HTTPS standard - and free
Over the last ten years, more than 600 million websites have been secured with free certificates from Let's Encrypt. Here's how it all began and why.
As Aas explained in a keynote speech at the Linux Foundation's 2025 Open Source Summit North America, "It's not just the issue of affordability, it's about removing the friction of needing to make any kind of recurring payment of any size we want. Let's Encrypt's success has inspired the ISRG to expand its effort to memory safety in critical internet infrastructure software by supporting the use of Rust in the Linux kernel via its Promissmo project. While the internet certainly has more than its fair share of security problems, at least we no longer need to worry about our website passwords being swiped when we're connecting via a coffee shop's Wi-Fi network.
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