NOTE: While this post shows mostly clerics using Masonic/Iluminati hand gestures of various kinds, I have included a few celebrities and politicians who are Catholics or have links with the Church. There are two details to especially watch out for: one person pressing on the knuckle of the other person’s hand and one person touching the inner wrist of the other. For more information see this post.
The former
Hand gestures are common among secret societies such as the Freemasons and the Illuminati, for the purpose of identifying the person making the gesture and they may also alert the viewer to a hidden agenda at play.
Not a handshake, but I just wanted to throw this one in.
Ecclesiastical Freemasonry 