anchor.diff:  ** http://rundis.github.io/blog/2015/buddy_auth_part3.html[Part 3: Token revocation]
   ** http://rundis.github.io/blog/2015/buddy_auth_part4.html[Part 4: Secure and liberate a service app]
   * http://kendru.github.io/restful-clojure/2015/03/13/securing-service-restful-clojure-part-4/[Securing the service | RESTful Clojure, Part 4]
  -
  -== License
  -
  -[source,text]
  -----
  -Copyright (c) 2013-2015, Andrey Antukh
  -
  -All rights reserved.
  -
  -Redistribution and use in source and binary forms, with or without
  -modification, are permitted provided that the following conditions are met:
  -
  -* Redistributions of source code must retain the above copyright notice, this
  -  list of conditions and the following disclaimer.
  -
  -* Redistributions in binary form must reproduce the above copyright notice,
  -  this list of conditions and the following disclaimer in the documentation
  -  and/or other materials provided with the distribution.
  -
  -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  -AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  -IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  -DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  -FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  -DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  -SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  -CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  -OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  -OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  -----
  
positive.code: 
  With that list of features:
  
  - Json Web Signature/Token
  - Compact message signing
  
  Github: https://github.com/funcool/buddy-sign
  
negative.code: 
  [source, clojure]
  ----
  [buddy "0.5.0"]
  ----
  
  In other case, see the concrete instalation instructions of the module that you need.
  