Survey of Hybrid Encryption Algorithm for Mobile Communication

To enhance the security of data transmission in Mobile communication, a hybrid encryption algorithm based on DES and RSA is proposed. The currently used encryption algorithm employed to protect the confidentiality of data during transport between two or more devices is a 128-bit symmetric block cipher. In the proposed hybrid encryption algorithm, DES algorithm is used for data transmission because of its higher efficiency in block encryption, encryption speed of DES algorithm is faster than RSA algorithm for long plaintext, and RSA algorithm distribute key safely and easily also RSA algorithm is used for the encryption of the key of the DES because of its management advantages in key cipher. Under the dual protection with the DES algorithm and the RSA algorithm, the data transmission in mobile communication system will be more secure. Meanwhile, it is clear that the procedure of the entire encryption is still simple and efficient. Digital abstract algorithm MD5 is adopted in this mechanism. Through comparing the digital signature which is transmitted by dispatcher and digital signature result of plaintext which is got by receiver through MD5 algorithm, data security can be guaranteed. This mechanism realizes the confidentiality, completeness, authentication and non- repudiation.