 Black-bag cryptanalysis

Black-bag cryptanalysis is a method of cryptographic attack that involves covertly obtaining cryptographic keys or other secure information from a target system or device. This technique does not rely on analyzing the mathematical properties of cryptographic algorithms or protocols but instead focuses on physical access to the hardware or systems involved. The term "black-bag" typically refers to the idea of an illicit entry or espionage operation, where an attacker gains unauthorized access to a physical location to extract information.