Bruce Schneier - Cryptographer

The term Schneier’s law was coined by Cory Doctorow in a 2004 speech, the law is phrased as:

Any person can invent a security system so clever that she or he can’t think of how to break it.

He attributes this to Bruce Schneier, who wrote in 1998:

Anyone, from the most clueless amateur to the best cryptographer, can create an algorithm that he himself can’t break. It’s not even hard. What is hard is creating an algorithm that no one else can break, even after years of analysis.