Lets Encrypt Documentation Get Help Donate About Us Languages [ lencr.org Last updated: Nov 30,2021 See all Documentation What's lencr.org lencr org is a domain name owned by Lets Encrypt We use it to host data that is referenced inside the certificates we issue_ Why is my computer fetching this data? Is it malicious? No, the data on lencr.org is never malicious. When a device connects to lencr org it's because client software on that device (like a web browser or an app) connected to another site, saw a Lets Encrypt certificate, and is trying to verify that it's valid This is routine for many clients We can't speak to whether the other site being connected to is malicious. If investigating network activity that seems unusual, then you may want to focus on the connection that started just before the connection to lencr org The pattern of clients' connections to lencr org might look unusual or intermittent: Clients might never retrieve this data; only retrieve subsets of it; or "cache" some data for efficiency, so theyIl only access it sometimes (the first time need it; and when the data may have expired): What exactly is this data for? When client software (like web browser or an app) connects to a site, and that site presents a certificate; the client should verify that the certificate is authentic and valid: This data helps clients do that in several ways: Under lencr ora we provide Online Certificate Status Protocol (OCSP) data A client mav youre they