Blackmail is a form of coercion in which someone threatens to reveal embarrassing, sensitive, or damaging information about another person unless specific demands are met. These demands may include money, favors, or actions that benefit the blackmailer. In cybersecurity, blackmail often involves threats to expose private data or compromising material obtained through hacking or social engineering. Blackmail is illegal and can have serious legal and personal consequences for both the victim and the perpetrator.