Avionics PIN Security for MUOS Access Control
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Solution Overview
Problem
Aircrafts with sensitive communication equipment face security risks when left at unsecured airports, as bad actors may gain access to the mobile user objective system (MUOS) network by removing and installing components in a lab environment, compromising physical security.
Innovation Solution
An avionics management system with a control display unit and processing unit that maintains a system state, requiring a personal identification number (PIN) for accessing the MUOS feature set, preventing unauthorized access by keeping MUOS functions disabled until a valid PIN is entered, thereby adding an additional layer of security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical security measures are implemented for sensitive communication equipment, then security against unauthorized access is improved, but ease of operation and mission flexibility deteriorate due to restricted access requirements
Solution Approach 1:
The patent introduces a control display unit (CDU) as an intermediary between the user and the MUOS feature set. The CDU requires PIN code validation before allowing access to MUOS functions, acting as a mediator that provides security while maintaining operational accessibility for authorized users. This resolves the contradiction by inserting a security layer that doesn't physically restrict access but controls logical access through authentication.
2Ease of repair
If components are made removable for maintenance and testing, then ease of repair is improved, but security against component theft and unauthorized access deteriorates
Solution Approach 1:
The patent replaces physical security measures (mechanical locks, secure enclosures) with an electronic/software-based security system. The security control is implemented through software logic in the avionics management system that checks PIN codes before enabling MUOS functions, substituting mechanical security with digital authentication while allowing components to remain physically accessible for maintenance.
3Reliability
If PIN validation is required for MUOS access, then security is improved, but device complexity increases due to additional authentication mechanisms
Solution Approach 1:
The control display unit (CDU) is designed to serve multiple functions: it is used for normal aircraft operation, maintenance procedures, and now also for PIN code authentication. By making the CDU multi-functional, the patent avoids adding separate authentication hardware, thereby limiting the increase in device complexity while still implementing security validation.
Data Source
AI summary
An aircraft is described. The aircraft includes an avionics management system including one or more control display units. The control display units include an alphanumeric keyboard. By the alphanumeric keyboard, an operator within the aircraft may input a personal identification number (PIN). The input PIN is received from the alphanumeric keyboard and compared with a PIN stored in memory. When the input PIN is validated, the avionics management system changes a system state from not validated to validated, thereby permitting the control display unit to access otherwise unavailable mobile user objective system (MUOS) feature sets, such as viewing MUOS presets or tuning to the MUOS presets.