anchor.diff:  
   [source,clojure]
   ----
  -[buddy/buddy-sign "0.12.0"]
  +[buddy/buddy-sign "0.13.0"]
   ----
   
   And is tested under JDK7 and JDK8.
  
positive.code: === Claims validation
  
  _buddy-sign_ json web encryption, like *jws*, also implements validation of a
  concrete subset of claims: *exp* (expiration time), *nbf* (not before), *iss*
  (issuer) and *aud* (audience).
  
  The validation is performed on decoding the token. If `:exp` claim is found and
  is posterior to the current date time (UTC) an validation exception will be raised.
  
  Let see an example using direct api:
  
  
negative.code: = buddy-sign - High level message signing.
  Andrey Antukh, <niwi@niwi.be>
  0.13.0
  :toc: left
  :!numbered:
  :source-highlighter: pygments
  