=head1 DESCRIPTION
-Support for a deterministic HMAC DRBG using the B<EVP_KDF> API. This is similiar
+Support for a deterministic HMAC DRBG using the B<EVP_KDF> API. This is similar
to L<EVP_RAND-HMAC-DRBG(7)>, but uses fixed values for its entropy and nonce
values. This is used to generate deterministic nonce value required by ECDSA
and DSA (as defined in RFC 6979).