Patent ID: 7613917
Filing Date: 2009-11-03
Classification: G01C

Abstract:
1. A method for on-line mass distribution of data products to end users, the method comprising: maintaining an encrypted first portion of each of said data products at a first location; maintaining an unencrypted second portion of each of said data products at a second location, wherein said second location is different from said first location; for each of said end users, confirming the end user's entitlement to one of said data products; obtaining an unencrypted second portion of said one of said data products on a navigation system from said second location; after said step of confirming, obtaining an encrypted first portion of said one of said data products on the navigation system from said first location, obtaining a decryption key and using said decryption key to decrypt said encrypted first portion; combining said decrypted first portion of said one of said data products and said unencrypted second portion of said one of said data products to form a combined product, wherein said step of combining is performed remote from said first location; storing said combined product on a portable computer-readable storage medium, wherein said combined product is not cryptographically secured on the computer-readable storage medium and said combined product does not include any protection information to limit use of said combined product by the navigation system; and providing said computer-readable storage medium having said combined first portion and second portion to said user, wherein the first portion of said data product comprises critical data that enables a program executed on the navigation system to use said data product including both the first portion and the second portion together for an intended purpose, wherein said end user accesses said combined product from said storage medium with said navigation system at a third location different from said first location and said second location.