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Mitnick's techniques largely relied on social engineering. He would create fake identities, forge security credentials, and manipulate company employees into revealing sensitive information. For example, posing as a Motorola employee, he was able to acquire proprietary source code merely by convincing staff that he needed it for a project. Incredibly, he hacked into some of the largest tech firms, including Motorola and Nokia, by exploiting weak points in their human resources.