confidentiality

from WordNet (r) 3.0 (2006)

confidentiality
    n 1: the state of being secret; "you must respect the
         confidentiality of your client's communications"
    2: discretion in keeping secret information

from The Collaborative International Dictionary of English v.0.48

confidentiality \confidentiality\ n.
   the state or attribute of being secret; privacy; as, you must
   respect the confidentiality of your client's communications.
   [WordNet 1.5 +PJC]

   2. discretion in keeping secret information.
      [WordNet 1.5]