Explore the evolution of digital identity guidelines and authentication methods in this 51-minute conference talk from BSides Nashville 2018. Dive into the history of identity assurance levels, various authentication techniques, and the latest NIST Digital Identity Guidelines. Learn about different types of authenticators, including memorized secrets, pre-registered knowledge, and cryptographic methods. Examine the changes between revision 2 and revision 3 of the guidelines, covering topics such as supervised remote in-person proofing and knowledge-based verification. Gain insights into the Identity Assurance Level, Authentication Assurance Level, and Federation Assurance Level. Discover why traditional password rules are considered ineffective and understand the concept of credentials, including digital certificates. Access contact information and slides for further reference.