[2/27/24, 11:00 AM EST] CSRC has been experiencing technical issues. If you are unable to access a CSRC page or resource, or get a 503 error, please try reloading the page several times--it may help to wait a few minutes before trying again. We apologize for the inconvenience, and hope to have a solution in place next week.
Output keying material that is derived from the key-derivation key KIN and other data that were used as input to a key-derivation function.
NIST SP 800-108r1 [August 2022 (Includes updates as of 02-02-2024)]