Welcome to the resource topic for 2025/1586
Title:
A Note on Feedback-PRF Mode of KDF from NIST SP 800-108
Authors: Ritam Bhaumik, Avijit Dutta, Tetsu Iwata, Ashwin Jha, Kazuhiko Minematsu, Mridul Nandi, Yu Sasaki, Meltem Sönmez Turan, Stefano Tessaro
Abstract:We consider FB-PRF, one of the key derivation functions defined in NIST SP 800-108 constructed from a pseudorandom function in a feedback mode. The standard allows some flexibility in the specification, and we show that one specific instance of FB-PRF allows an efficient distinguishing attack.
ePrint: https://eprint.iacr.org/2025/1586
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