White hat (computer security) White hat (computer security) The term "white hat" in Internet slang refers to an ethical computer hacker, or a computer security expert, who specializes in penetration testing and in other testing methodologies that ensures the security of an organization's information systems. Ethical hacking is a term meant to imply a broader category than just penetration testing. Contrasted with black hat, a malicious hacker, the name comes from Western films, where heroic and antagonistic cowboys might traditionally wear a white and a black hat respectively. While a white hat hacker hacks under good intentions with permission, and a black hat hacker
Prefix "ent-" (negation) can be considered the opposite of particle "be-", while "er-" can be considered the opposite of "ver-". The prefix "er-" usually indicates the successful completion of an action, and sometimes the conclusion means death. With fewer verbs, it indicates the beginning of and action. The prefix "er-" is also used to form verbs from adjectives (e.g. "erkalten" is equivalent to "kalt werden" which means "to get cold"). Prefix A prefix is an affix which is placed before the stem of a word. Adding it to the beginning of one word changes it into another word. For example, when