NSA Director Lt. Gen. Keith Alexander tells senators the U.S. Cyber Command aims to protect the privacy of American citizens despite the uncharted legal territory in cyberspace.

Lt. Gen. Keith Alexander told the Senate Armed Services Committee April 15 that he would work to protect the privacy rights of Americans—even as he noted the amount of uncharted territory in cyber-law.

Currently director of the National Security Agency, Alexander has been nominated by President Obama to head the U.S. Cyber Command. The Cyber Command is a subordinate unified command under the U.S. Strategic Command, and was created in 2009 to protect Department of Defense networks and coordinate the country’s cyber-warfare operations.