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-rw-r--r--doc/source/crypto/fhmqvc.rst2
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/source/crypto/fhmqvc.rst b/doc/source/crypto/fhmqvc.rst
index e3af6d4..a3379e2 100644
--- a/doc/source/crypto/fhmqvc.rst
+++ b/doc/source/crypto/fhmqvc.rst
@@ -83,7 +83,7 @@ where :math:`V|W` designates the concatenation of the binary strings :math:`V` a
.. math::
- \text{HKDF}(\textit{salt}, \textit{IKM}, \textit{info}, L) = \text{HKDF-Expand}(\text{HKDF-Expand}(\textit{salt}, \textit{IKM}), \textit{info}, L)
+ \text{HKDF}(\textit{salt}, \textit{IKM}, \textit{info}, L) = \text{HKDF-Expand}(\text{HKDF-Extract}(\textit{salt}, \textit{IKM}), \textit{info}, L)
See [FIPS180]_ (SHA256), [RFC2104]_ (HMAC) and [RFC5869]_ (HKDF)
for the specifications of these algorithms.