With much of the U.S. federal government adopting cloud computing services such as cloud based email, the Defense Department looks to be next, according to NextGov's website.

General Keith Alexander, chief of the U.S. Cyber command, said using the cloud is an "active defense" and something that will help networks change for the better. He told a crowd of security officials at the Security Innovation Network conference that the government needs to find a way to pass signatures around and communicate dynamically without being affected by malware and cyber attacks.

Alexander said the cloud can serve as a shield against these attacks by quickly showing signs of network manipulation. He said using the cloud to automate services would severely speed up the time between a breach and figuring out that there was a breach. He told the crowd he believes the cloud can ensure the integrity of data.

According to Network Computing's website, the U.S. government started requiring agencies to deliver at least one of its IT services through cloud computing. Many departments have gone with cloud-based email thus far.