Nov 142009
 November 14, 2009  Surveillance, U.S.

Matt Blaze writes:

This week in Chicago, Micah Sherr, Gaurav Shah, Eric Cronin, Sandy Clark, and I have a paper at the ACM Computer and Communications Security Conference (CCS) that’s getting a bit more attention than I expected. The paper, Can They Hear Me Now? A Security Analysis of Law Enforcement Wiretaps [pdf] examines the standard “lawful access” protocols used to deliver intercepted telephone (and some Internet) traffic to US law enforcement agencies. Picking up where our 2004 analysis of wireline loop extender wiretaps [pdf] left off, this paper looks at the security and reliability of the latest communications surveillance standards, which were mandated by the 1994 Communications Assistance for Law Enforcement Act (CALEA). The standards, it turns out, can leave wiretaps vulnerable to manipulation and denial of service by surveillance targets who employ relatively simple technical countermeasures.

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