We Must Secure Cell Networks from Criminals and Cops

This month, FCC Chairman Tom Wheeler revealed, in response to a letter from Congressman Alan Grayson, that his agency is assembling a task force “to combat the illicit and unauthorized use of IMSI catchers.” Often known as the brand-name “StingRay,” these are surveillance devices that impersonate legitimate cell towers, enabling them to covertly identify and locate nearby cell phones and, in some cases, to intercept the content of calls or text messages those phones send or receive.

nsa_phoneA Stingray does this by exploiting a persistent vulnerability in the 2G protocol: telephones operating in 2G cannot authenticate cell towers, which means that a rogue tower can appear to be part of a legitimate cellular network. Although 3G and 4G networks have addressed this vulnerability, these networks can be jammed, forcing nearby phones to communicate using the vulnerable 2G protocol. As long as phones include the capability to communicate using 2G—a useful thing when 2G remains widespread in rural areas—the latest smartphones will remain vulnerable to decades old security flaws. Moreover, IMSI catchers remain essentially invisible, since their operation can only be detected in real time with rarely used counter-surveillance equipment.

The FCC task force represents a step in the right direction, but Chairman Wheeler’s response appears to limit its focus to illegal uses of Stingrays, which would not address the serious underlying cyber security problem that enables their operation, legal or not.

Policymakers should take a dim view of any aspects of national surveillance policy and practice that rely upon perpetual network vulnerabilities.
About Albert N. Milliron 6991 Articles
Albert Milliron is the founder of Politisite. Milliron has been credentialed by most major news networks for Presidential debates and major Political Parties for political event coverage. Albert maintains relationships with the White House and State Department to provide direct reporting from the Administration’s Press team. Albert is the former Public Relations Chairman of the Columbia County Republican Party in Georgia. He is a former Delegate. Milliron is a veteran of the US Army Medical Department and worked for Department of Veterans Affairs, Department of Psychiatry.

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