Which of the following is NOT a category of a Potentially Harmful App (PHA)?

Jailbreaking is a process that removes software restrictions imposed by the device manufacturer, typically on iOS devices, to allow for greater customization and the installation of unauthorized apps. While it can introduce security risks, it is a user-initiated modification of the operating system, not a category of malicious software (PHA) itself. Potentially Harmful Apps (PHAs) are categorized by their malicious intent or behavior. Hostile downloader, Denial of Service, and Backdoor are all recognized categories of PHAs because they describe specific types of malicious software that can compromise device security, data integrity, or availability without user consent.