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Even though that CDMA 2000 wireless networks is being widely deployed as a cellular digital standard around the world, it has some hidden vulnerabilities when concerned with the security issues. The main focus of this paper is to propose MANAGE1 as a design of a new stream cipher system to be used for data encryption in CDMA wireless networks. This new cipher system is intended to replace the offered data encryption algorithm in CDMA networks known as ORYX. The proposed cipher system is being assessed from different aspects. The first aspect addresses the period and linear complexity profiles of the generated keystream. The second is the statistical properties of the keystream, which are being tested using the standard statistical tests. It is shown that MANAGE1 cipher system improves the practical security over the ORYX, thus ensuring that data security in CDMA networks becomes more reliable to suit the high demand of secure data transmissions in the next generation of wireless communications.

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Wavelet transform has become a suitable tool for diagram of a general QMF cell. To achieve the function of DWT DSP signal manipulation especially in image compression. A a set of QMF's are connected in series by connecting the low VLSI implementation of a CMOS circuit realizing a Discrete pass output of the QMF to the input of the next QMF forming a Wave Transform ( DWT ) for Daubecchie's 6 [l] using a bank of QMF filters. novel presented. based on a The new new Finite design Impulse of the Response DWT system filter which FIR [2] is 4i---EL High pass requires less Si area to be implemented, since the FIR filter is implemented using mixed parallel I sequential architecture Input resulting in reducing the number of binary multipliers used which are the major bottle neck governing the performance faster system. Moreover, the use of parallel multipliers ^..&..* realization of Quadrature Mirror Filter [QMF] is filter H(z) output Low pass of the DSP processing. Consequently. it results in a much filter L(z Pass results in less power dissipation.

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