I'm not a cryptography guy, but do you think it would be possible to come up with a technical solution which has these properties: - License plate numbers are

I'm not a cryptography guy, but do you think it would be possible to come up with a technical solution which has these properties: - License plate numbers are immediately encrypted at scan - A judges possess some sort of encryption key - Upon obtaining some sort of warrant, judge grants police specific encryption key - Key can only be used to decrypt certain kinds of data - say, only decrypts license plates in a certain geographical area or around a certain time