Abstract: A system and method are provided for implementing a security construct for downloading, delivering and protecting large amounts of data for transfer to an aircraft upload capability in a short period of time, including between individual legs of a flight for a particular aircraft or fleet of aircraft. Large data packages include In Flight Entertainment and Electronic Flight Bag data. The data is downloaded at an available rate using wired communication paths communicating with various data sources via communication networks to a mobile communication device. The data is secured in the mobile communication device according to particular encryption schemes acceptable to data content providers. The mobile communication device securely holds the data for carriage to the aircraft where wired communication is established to upload the data in available abbreviated amounts of time in a manner that is not dependent on the availability of wireless communicating bandwidth.