libdigest-hmac-perl - 1.05+dfsg-1 main

HMAC is used for message integrity checks between two parties
that share a secret key, and works in combination with some other
Digest algorithm, usually MD5 or SHA-1. The HMAC mechanism
is described in RFC 2104.
.
The Digest::HMAC module follow the common Digest:: interface,
but the constructor takes the secret key and the name of some
other simple Digest:: module as argument.