Immunity releases $3,600 portable Wi-Fi penetration tester, Silica: The product couples a Nokia 770 Internet Tablet with a custom version of Immunity's CANVAS software. Other devices will be supported in the future. The software allows automatic detection of Wi-Fi networks, automatic connection, and automatic penetration. This is intended to be a white-hat product used to improve security at companies--or demonstrate flaws. The software can be enabled via a stylus, and then actively work while located in, say, a pocket. CANVAS has "hundreds of exploits," this article states, and Silica could, for instance, compromise a computer, and leave it set to be remotely controlled. The company vets purchasers.