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When being used to encrypt spatial map data, the encryption performance of RSA algorithm is very low. This paper proposes an encryption model for spatial map data based on the optimized RSA algorithm. First, we do the adaptive optimization respectively with standard RSA algorithm module, encryption key and decryption key, and then using random increasing search method to do the next cycle test on the original plus 2 instead of the method of generate random number, to improve the speed of prime number detection, finally by selecting three prime factor, and reduce the time needed for the big prime number selected. Because the big prime number reduced digits, it reduces the amount of calculation. Simulation experiments show that the proposed spatial map data encryption model based on the effectiveness optimization RSA algorithm, it has better performance of encryption and decryption.

An Encryption Scheme for Spatial Map Data Based on Optimized RSA Algorithm