ietf-wg-acme/acme. In: github.com. Abgerufen am 6. Januar 2017 (englisch).
ietf.org
tools.ietf.org
RFC8555 – Automatic Certificate Management Environment (ACME). März 2019 (englisch).
RFC6125 – Representation and Verification of Domain-Based Application Service Identity within Internet Public Key Infrastructure Using X.509 (PKIX) Certificates in the Context of Transport Layer Security (TLS). März 2011, Abschnitt 7.2 (englisch). “This document states that the wildcard character '*' SHOULD NOT be included in presented identifiers but MAY be checked by application clients (mainly for the sake of backward compatibility with deployed infrastructure). […] Several security considerations justify tightening the rules: […]”.