VeriSign, the company trusted with protecting our data when we go on online shopping sprees, has decided to clip its wings after revenues fell 6 percent in the third quarter. It's dropping new ventures, like mobile banking technology and Internet telephony, which it acquired in moments of irrational exuberance, in favor of focusing on its traditional enterprises. VeriSign's domain-name registry and e-commerce services accounted for 60 percent of its profits last quarter.