Hacking is the use of technology to gain access to an individual’s or organization’s computer or network without authorization and illegally. The purpose of hacking is to obtain information and resources that would otherwise not be available to unauthorized personnel. Hacking is also done to make alterations which aid in the process of committing future misdeeds and crimes o an organization. A person who hacks is referred to as a hacker. This paper discusses the 2016 hacking of Tesco’s system.