yetkisiz

Yetkisiz is a Turkish adjective meaning “without authorization” or “without permission.” It is formed from the noun yetki, meaning authority or permission, and the suffix -siz, which denotes absence. The term is commonly used to describe actions, access, or individuals that operate without proper authorization or contrary to established rules.

In information security, yetkisiz erişim refers to unauthorized access to systems, data, or networks. Yetkisiz kullanıcı denotes someone who does not have valid credentials or permission to use a resource. The concept is central to access control, authentication, and authorization mechanisms, and is addressed by security policies, audit logging, and enforcement of least privilege.

In legal and regulatory language, yetkisiz usage or yetkisiz işlem may describe actions performed without permission and may be subject to penalties depending on jurisdiction. It can pair with izinsiz to emphasize lack of consent in more specific contexts; however, the two terms have nuanced meanings: izinsiz focuses on the absence of consent, whereas yetkisiz emphasizes lack of official authority.

Common collocations include yetkisiz erişim, yetkisiz kullanım, and yetkisiz değişiklik. The term is widely understood in Turkish-speaking IT, law, and policy communities.