Bruce Schneier. an internationally renowned security technologist and author, described by The Economist as a "security guru" made it to the top list of cyber security experts in 2017.
He is also the author of 13 books -- including "Data and Goliath: The Hidden Battles to Collect Your Data and Control Your World" -- as well as hundreds of articles, essays, and academic papers. His influential newsletter "Crypto-Gram" and blog "Schneier on Security" are read by over 250,000 people. Schneier is a fellow at the Berkman Centerfor Internet and Society at Harvard Law School, a program fellow at the New America Foundation's Open Technology Institute, a board member of the EFF, Electronic Frontier Foundation, and an Advisory Board member of the Electronic Privacy Information Center. He is also the Chief Technology Officer of IBM Resilient, Inc. You can follow him on @schneierblog