Chapter 11 on physical security was great. http://www.cl.cam.ac.uk/~rja14/Papers/SEv2-c11.pdf http://www.cl.cam.ac.uk/~rja14/Papers/SEv2-c11.pdf How to steal

Chapter 11 on physical security was great. http://www.cl.cam.ac.uk/~rja14/Papers/SEv2-c11.pdf http://www.cl.cam.ac.uk/~rja14/Papers/SEv2-c11.pdf How to steal a painting (7) Bruno cuts the telephone line to his rival’s gallery and hides a few hundred yards away in the bushes. He counts the number of men in blue uniforms who arrive and the number who depart. If the two numbers are equal, then it’s a fair guess the custodian has said, ‘Oh bother, we‘ll fix it in the morning’, or words to that effect. He now knows he has several hours to work. -- page 384-385 in this case wouldn't it be better to use two different 3G/4G operators in addition to the fixed line?