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Additively LWE Based Homomorphic Encryption for Compact Devices with Enhanced Security

LWE based homomorphic encryption scheme has been proven as secured technique and consequently widely implemented since the last decade. However, the scheme is not considered to be practical because of its larger size of public keys and ciphertexts. In this paper, LWE based additively homomorphic encryption technique is further modified to enhance the performance in minimizing the space required for public keys and ciphertext without compromising the security of the scheme. This makes the scheme suitable for implementation in low space devices. The practical implementation of the scheme is explored and its performance analysis has been presented here. The scheme is also compared with the standard LWE.