In this talk, we will introduce a new synchronous stream cipher, called WG stream cipher, which was submitted to ECRYPT STREAM
CIPHER PROJECT in 2005. The WG cipher has been designed to produce keystream with guaranteed randomness properties, i.e., balance,
long period, large and exact linear complexity, 3-level additive autocorrelation, and ideal 2-level multiplicative autocorrelation.
It is resistant to Time/Memory/Data tradeoff attacks, algebraic attacks and correlation attacks. The cipher can be implemented
with a small amount of hardware. The talk will start with an introduction to design criteria of stream ciphers and
pseudo-random sequence generators, aspects of stream cipher versus block in wired/wireless communication networks,  and current  status of stream ciphers in cellular communication systems of  W-CDMA and CDMA 2000.