– Nobody is really responsible for security management. – A wrong sense for security, i.e. someone did a security check years ago and there was no related activity afterwards. – Securing the Network is often considered a "non-productive" task. Unfortunately, this attitude is not likely to be changed before a major security incident occurs. But as everyone knows the alarm systems installed direc...

Speech scrambling techniques are used to scramble clear speech into unintelligible signal in order to avoid eavesdropping. . Analog scramblers are intended in applications where the degree of security is not too critical and hardware modifications are prohibitive due to its high cost .The residual intelligibility of the speech signal can be reduced by reducing correlation among the speech sampl...