WordNet sense 1 (accessible to all):

open

WordNet sense 2 (accessible to all):

unexclusive

WordNet sense 3 (not private; open to or concerning the people as a whole):

public

WordNet sense 4 (not changed in form or character):

unmodified

WordNet sense 5 (able to act at will; not hampered; not under compulsion or restraint):

free

WordNet sense 6 (never having had security classification):

nonsensitive

WordNet sense 7 (not subject to a security classification):

unclassified