This book would not have been possible without the exceptional work of the No Starch Press team. Thanks to my publisher, Bill Pollock; thanks to my editors, Riley Hoffman, Jan Cash, Annie Choi, Anne Marie Walker, and Laurel Chun, for their incredible help throughout the process; thanks to my technical editor, Ari Lacenski, for her help in this edition and back when it was just a stack of printouts I showed her at Shotwell’s; thanks to JP Aumasson for lending his expertise in the public key chapters; and thanks to Josh Ellingson for a great cover.