Kiosk Modes
Kiosk Modes
Kiosk Mode is a system configuration approach that restricts the operation of an embedded device to a specific, predefined set of applications or user interactions. In this mode, the system boots directly into the designated application—often a graphical interface or a full-screen user-facing service—while blocking access to the underlying operating system, additional applications, or system settings.
Kiosk Modes are widely adopted in embedded, industrial, and commercial environments where the primary goal is to ensure a controlled and secure user experience. Typical use cases include:
- Public terminals (e.g., information kiosks or ticketing machines)
- Digital signage systems
- Medical or industrial instrumentation
- Point-of-sale (POS) devices
- Appliances running headless or graphical interfaces
From a security perspective, kiosk configurations significantly reduce the system's attack surface by:
- Preventing unauthorized access to the system shell or backend services
- Disabling or restricting input devices and system shortcuts
- Blocking access to networking or removable media unless explicitly allowed
- Limiting the scope of what can be executed or modified by users
Implementing a kiosk mode typically involves:
- Customizing the init system (e.g.,
systemd) to launch only the required services - Using display servers like Weston or X11 in restricted modes
- Removing unused packages and disabling unnecessary login methods
- Ensuring the application runs in full screen and automatically recovers from crashes
Kiosk mode is also a crucial step in achieving device hardening, especially when paired with secure boot, filesystem integrity checking, and strict access control policies. In systems where users interact with the hardware directly, enforcing a kiosk mode helps maintain system integrity, user privacy, and service continuity.