NIST is proud to announce a public preview of Special Publication 800-63-3: Digital Authentication Guideline, which is currently in development. This preliminary draft contains new changes based on what we have learned from experts, industry stakeholders, and NSTIC pilots since our last version was published. See a brief synopsis of the SP 800-63-3 development effort. We welcome your substantive feedback on this draft document via our GitHub site. After development is complete, the public draft will be posted on CSRC for a traditional public comment period. As always, thank you for your participation—we look forward to making this document even better with your input!