This document defines how an ACME Server may offer a selection of different certificate profiles to ACME Clients, and how those clients may indicate which profile they want.| IETF Datatracker
A profile is a collection of characteristics that describe both the validation process required to get a certificate, and the final contents of that certificate. For the vast majority of Let’s Encrypt subscribers, you should never have to worry about this: we automatically select the best profile for you, and ensure that it complies with all of the requirements and best practices that govern the Web PKI. But some people might be interested in proactively selecting a specific profile, so thi...| letsencrypt.org
Public Key Infrastructure using X.509 (PKIX) certificates are used for a number of purposes, the most significant of which is the authentication of domain names. Thus, certification authorities (CAs) in the Web PKI are trusted to verify that an applicant for a certificate legitimately represents the domain name(s) in the certificate. As of this writing, this verification is done through a collection of ad hoc mechanisms. This document describes a protocol that a CA and an applicant can use to...| IETF Datatracker
This memo profiles the X.509 v3 certificate and X.509 v2 certificate revocation list (CRL) for use in the Internet. An overview of this approach and model is provided as an introduction. The X.509 v3 certificate format is described in detail, with additional information regarding the format and semantics of Internet name forms. Standard certificate extensions are described and two Internet-specific extensions are defined. A set of required certificate extensions is specified. The X.509 v2 CRL...| IETF Datatracker