Let's Encrypt: An Automated Certificate Authority to Encrypt the Entire Web. - Josh Aas; Richard Barnes 001; Benton Case; Zakir Durumeric; Peter Eckersley; Alan Flores-López; J. Alex Halderman; Jacob Hoffman-Andrews; James Kasten; Eric Rescorla; Seth D. Schoen; Brad Warren (CCS, 2019)

Automatic Certificate Management Environment (ACME). - Richard Barnes 001; Jacob Hoffman-Andrews; Daniel McCarney; James Kasten (RFC, 2019)

DNS Certification Authority Authorization (CAA) Resource Record. - Phillip M. Hallam-Baker; Rob Stradling; Jacob Hoffman-Andrews (RFC, 2019)