Description: A whitelist is a security mechanism that allows access or privileges to a specific set of entities, such as users, IP addresses, applications, or devices. Unlike a blacklist, which blocks unwanted entities, a whitelist focuses on allowing only those that have been previously authorized. This approach is fundamental in security management as it minimizes the risk of unauthorized access and cyberattacks. Whitelists are used in various applications, from firewall configurations to sensitive data access management, ensuring that only trusted entities can interact with critical systems. Their implementation can vary in complexity, from simple control lists to more sophisticated systems that integrate artificial intelligence for continuous evaluation of authorized entities. In a world where cyber threats are becoming increasingly sophisticated, whitelists have become an essential tool for protecting information and technological infrastructure.