An Improved Geo-encryption Algorithm in Location Based Services

Wireless technology is used in many applications with location based data encryption techniques to secure the communication. The use of knowledge of the mobile user's location called Geo-encryption, produces more secure systems that can be used in different mobile applications. Location Based Data Encryption Methods (LBDEM) is a technique used to enhance the security of such applications called as Location Based Services (LBS). It collects position, time, latitude coordinates and longitude coordinates of mobile nodes and uses for the encryption and decryption process. Geo-encryption plays an important role to raise the security of LBS. Different Geo-protocols have been developed in the same area to add security with better throughput. The Advanced Encryption Standard in Geo-encryption with Dynamic Tolerance Distance (AES-GEDTD) is an approach which gives higher security with a great throughput. This approach mainly uses the AES algorithm, symmetric key encryption algorithm. But applying this algorithm to more complex data like images, videos, etc. like in Digital Film Distribution, we might face the problem of computational overhead. To overcome this problem, we analyze AES and modify it, to reduce the computational overhead. In the modified AES algorithm (M-AES), we omit the calculation of mix column operations and hence the M-AES-GEDTD is a fast and lightweight algorithm for multimedia data.