an‧o‧nym‧i‧ty /ˌænəˈnɪməti, ˌænəˈnɪmɪti/
noun [uncountable] when other people do not know who you are or what your name is:
Every step will be taken to preserve your anonymity. One official, who spoke on condition of anonymity (=he would only speak if his name was not told), said the White House took the threat very seriously. the anonymity of city streets (=you do not know anyone, and no one knows you) [TahlilGaran] Dictionary of Contemporary English ▲