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2009
ACM

Can they hear me now?: a security analysis of law enforcement wiretaps

8 years 10 months ago
Can they hear me now?: a security analysis of law enforcement wiretaps
Although modern communications services are susceptible to third-party eavesdropping via a wide range of possible techniques, law enforcement agencies in the US and other countries generally use one of two technologies when they conduct legally-authorized interception of telephones and other communications traffic. The most common of these, designed to comply with the 1994 Communications Assistance for Law Enforcement Act (CALEA), use a standard interface provided in network switches. This paper analyzes the security properties of these interfaces. We demonstrate that the standard CALEA interfaces are vulnerable to a range of unilateral attacks by the intercept target. In particular, because of poor design choices in the interception architecture and protocols, our experiments show it is practical for a CALEA-tapped target to overwhelm the link to law enforcement with spurious signaling messages without degrading her own traffic, effectively preventing call records as well as content...
Micah Sherr, Gaurav Shah, Eric Cronin, Sandy Clark
Added 19 May 2010
Updated 19 May 2010
Type Conference
Year 2009
Where CCS
Authors Micah Sherr, Gaurav Shah, Eric Cronin, Sandy Clark, Matt Blaze
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