Patent ID: 7653188

Claim:
A method of protecting communication services of a communication enterprise, said method comprising the steps of: detecting, by a processor, a perceived extension attack in the form of a call directed to one or more extensions within the communication enterprise, said detecting including analyzing at least one attribute of the call; classifying, by a processor, a risk associated with the call based upon the analysis of the at least one attribute; taking, by a processor, a remedial action to thwart the perceived attack according to the risk associated with the call: and said detecting by a processor comprises (i) creating an algorithm, (ii) applying the algorithm to a first media stream of the call, (iii) generating a first media hash value reflective of the first media stream content, (iv) applying the algorithm to a second media stream of a subsequent call directed to the communications enterprise, (v) generating a second media hash value reflective of the second media stream, (vi) comparing the first and second hash values, and (vii) taking the remedial action if the first and second hash values fall within a pre-designated range.