ruby-hmac: HMAC for Ruby This module provides a common interface to HMAC functionality. HMAC is a kind of "Message Authentication Code" (MAC) algorithm which standard is documented in RFC2104. Namely, a MAC provides a way to check the integrity of information transmitted over or stored in an unreliable medium, based on a secret key. Author: Daiki Ueno WWW: http://deisui.org/~ueno/ruby/hmac.html