Enhanced Wireless Transmitted Message Security By Encryption Complex Transformation
Authors: Oleg Viktorov, Ahmed Shihab
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Wireless communications have less hacking immunity than wired communications. With the increase of dependability on wireless data transfer and calling, it is necessary to develop new rigid algorithm to add more levels of security on the wireless data. In the fact, the effort that is continuously put in hacking the wireless transmitted data is more than the effort that is put in building secure communication channels. A packet transfer security model for wireless communication by the mean of cryptography and complex transformation. Was presented a secret key encryption / decryption algorithm was developed and presented in this paper. The encryption algorithm is demonstrated to decrypt the message and convert it to meaningless rapish data. The cryptographic encryption / decryption of the wireless packet is a first level security procedure, while the second level of security is being added by sending not the encrypted packet itself, but the complex transformation of that packet. Discrete cosine transform (DCT) and discrete wavelet transform (DWT) have been compared. The comparison was bases on peak signal to noise ration (PSNR) and mean square error (MSE). The wavelet transformation space is larger than the discrete cosine transform, so, the PSNR was much higher in DWT than DCT. The MSE is approximately the same for both.