Mumble attack

A mumble attack is a widely used social engineering technique used as an information obtainment tool.

Application example

Online cell phone record vendors place a call to customer service requesting customer account information while posing as an employee from the company's "special needs group," etc, - a potentially nonexistent department. The caller can claim to be making the request on behalf of a voice-impaired customer who was unable to request the records himself. If the service representative asked to speak with the customer directly, the caller would impersonate a voice-impaired customer, using a mechanical device to distort his voice and make it impossible for the service representative to understand him, thus fooling a customer service representative into releasing private information.