Ether 8:19 (The Book of Mormon)
For the Lord worketh not in secret combinations, neither doth he will that man should shed blood, but in all things hath forbidden it, from the beginning of man.
The Guide to the Scriptures (lds.org online)
Ceremonial Details including the secret handshakes, passwords, and signs.
Hidden camera footage including all the secret handshakes, passwords, and signs.