Cryptographic Extraction and Key Derivation: The HKDF Scheme by Hugo Krawczyk 2026-11-05
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Primary source: eprint.iacr.org/2010/264
Verified locator: Cryptology ePrint2010/264, by Hugo Krawczyk. Abstract: formal KDF treatment via computational extractors, extract-then-expand design, HMAC extraction and pseudorandomness assumptions. Received11May2010; current record revised10May2020.
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HMAC-based Extract-and-Expand Key Derivation Function (HKDF) by Hugo Krawczyk and Pasi Eronen 2026-11-05
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RFC5869, Informational, May2010. Sections2.2–2.3 specify extraction and expansion; §3.2 describes context information. Authors’ Addresses verifies full names Hugo Krawczyk and Pasi Eronen.
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HMAC: Keyed-Hashing for Message Authentication (RFC 2104) 2026-11-05
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February1997, bylines H.Krawczyk, M.Bellare and R.Canetti. Title page and Status of This Memo classify the RFC as Informational; §§1–2 motivate and define HMAC. Full author identities are verified separately by the June1996 author manuscript Keying Hash Functions for Message Authentication, rather than inferred by expanding initials.
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Keying Hash Functions for Message Authentication by Mihir Bellare, Ran Canetti and Hugo Krawczyk 2026-11-05
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Author manuscript, title page dated June1996, exact full bylines Mihir Bellare, Ran Canetti and Hugo Krawczyk. Abstract and §§1.1–1.3 describe NMAC/HMAC, the shared-key authenticity problem and the relation between security and underlying hash-function assumptions. The title page identifies an abridged version in CRYPTO96 proceedings, LNCS1109.
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