Incognito

Incognito means:


 * 1) With one's identity disguised or concealed.
 * 2) A person who is incognito.
 * 3) The assumed name or disguise of such a person.
 * 4) The identity assumed by a person whose actual identity is disguised or concealed.


 * Source:http://www.thefreedictionary.com/incognito