Privacy-friendly skies: Models, metrics, & solutions

■ ADS-B presents location privacy threat to GA aircraft operators ■ Encryption based privacy solutions are impractical for GA ■ We proposed simple solutions to enhance ADS-B privacy ■ enable privacy preserving beneficial access to ATC services in GA ■ Specified metrics for assessing achievable operator privacy gains ■ Open problems include assessing impact on ADS-B applications, identifying opportune scenarios for flight privacy enhancement, and specifying privacy levels desired by GA operators