91.   Executive privilege is a legal doctrine that allows the president to keep secret some communications with aides about policy matters.

92.   Federal threat assessments are sometimes kept secret to prevent foes from gaining possibly useful information from them.

93.   Even then, she had to keep it secret that she carried HIV in order to protect son Matt, who was still alive and infected.

94.   Even this article was kept secret.

95.   Everyone has two cryptographic keys or passwords, one to be kept secret and the other made public.

96.   First, he has to fight an illness, which he kept secret throughout his career, though it steadily eroded his strength.

97.   For decades, Soviet possession of much of the looted art and government archives was kept secret.

98.   Feingold wanted to know why their identities were being kept secret and how they were being treated.

99.   For months, Donna Kay Peterson kept secret her marriage to an elderly millionaire.

100.   First, it can reveal information that a person might wish to keep secret.