Map data processing method, map data processing device,...

Details Map data processing method, map data processing device,... Map data processing method, map data processing device,...

2002-10-17

2008-11-04

Moise, Emmanuel L (Department: 2137)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

By stored data protection

C701S200000, C726S030000

Reexamination Certificate

active

07447915

ABSTRACT:
A map data processing method for handling map data stored in a portable storage medium includes the steps of encrypting only a portion of the map data to be stored on the storage medium, and storing the map data, of which only the portion has been encrypted, on the storage medium. According to this processing method, it is possible to reduce the time necessary for encryption and decryption. In addition, by both encrypting and decrypting the map data based on a code specific to the storage medium, it is possible to minimize illegal copying of the map data.

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