By occupying or operating a Nissan vehicle you automatically agree to their dogshit ToS and privacy policy. You give Nissan the right to collect and sell the following data:
"Name, email address, phone number, mailing address, geolocation, zip code, age, date of birth, driver’s license number, national or state identification number, citizenship status, immigration status, race, national origin, religious or philosophical beliefs, sexual orientation, sexual activity, precise geolocation, health diagnosis data, and genetic information, social security number as an employee, service or warranty information regarding vehicles, employment and related information, such as employee identification number National or State Identification Numbers, and dependent information for the administration of certain employee benefits or programs.. Also: Inferences drawn from any Personal Data collected to create a profile about a consumer reflecting the consumer’s preferences, characteristics, psychological trends, predispositions, behavior, attitudes, intelligence, abilities, and aptitudes Vehicle- and driving-related information: the vehicle’s operation including, without limitation, Vehicle Identification Number (VIN), geolocation and navigation information, speed and distance information, driving habit and style, battery use management information (for electric vehicles), battery charging history (for electric vehicles), battery deterioration information (for electric vehicles), electrical system functions, diagnostic trouble codes, maintenance conditions, software version information, and other data, your use of the vehicle and any corresponding services, websites and smartphone applications, vehicle status information (e.g., information about door locks, open doors, engine status, etc.), data about accidents involving the vehicle (e.g., the direction from which the vehicle was hit, and which air bags have deployed)."
And that's just Nissan. Privacy Not Included* reviewed many other car brands in their report
What if the key was in a book? It would have to be protected by free-speech, which makes it uncensorable.
What if the key contents were used as hex values to make a flag? Would you censor a flag too?
No such thing as "proprietary encryption keys" exist.