In this episode Martin and Chris host Sarah Gran and Josh Aas of the Internet Security Research Group (ISRG). The ISRG is home to such little-known projects :-) such as Let's Encrypt and Prossimo, an approach to rewrite some of the most important pieces of the Internet infrastructure including the Network Time Protocol (NTP) and cURL in a memory-safe language (spoiler alert: details in the episode). So even if you're not running a website where the SSL certificates come from Let's Encrypt: You don't want to miss this episode!