In this paper, a two-dimensional (2-D) finitedifference time-domain method (FDTD) scheme is used to simulate the transient scattering characteristics of buried
Difference similitude matrix (DSM) is effectivein reducing information system with its higher reduction rate and higher validity. We use DSM method to analyze t
We first discusses some threats to VolP system and H. 323 architectures designed for VolP communications on security point of view. Continues with presenting se
The proposed method inserts a watermark into the spectral components of the data using techniques analogous to spread spectrum communications, hiding a narrow b