Secrecy is the practice of hiding information from certain individuals or groups who do not have the "need to know", perhaps while sharing it with other individuals. That which is kept hidden is known as the secret.
U.S. soldier at camp during World War II.
Loose lips might sink ships, World War II slogan
First secret confidence to Venus, François Jouffroy
A Secret from on High (Secret d'en haut), Hippolyte Moulin (Hypolite Moulin), 1879
As an ethic that spans science, engineering, business, and the humanities, transparency is operating in such a way that it is easy for others to see what actions are performed. Transparency implies openness, communication, and accountability.
Shimer College students demonstrate in favor of transparency in school administration, 2010.
A 2011 plaque recognizing the municipality of Santa Barbara, Pangasinan for its "efforts in advancing the principles of accountability and transparency in local governance"