Hoping to catch cybercrooks, the U.S. Federal Bureau of Investigation has begun embedding agents with law enforcement agencies in Estonia, the Ukraine and the Netherlands.

Although the electronic attacks against Estonia are two years in the past, the small Baltic nation is still hardening its defenses.

A decision in the Estonian parliament has opened the door for mobile phones to be used for authenticating voters in its 2011 election.

More than anyone else, Jaak Aaviksoo has first-hand knowledge of what a cyberwar might feel like. In April 2007, Estonia's banking, media and government presence online was disrupted by several waves of distributed denial of service attacks that knocked services offline. The country is heavily wired -- 90 percent of all financial transactions are conducted over the Internet and 70 percent of the population files their tax returns electronically -- so the incident was widely felt by the country's 1.3 million citizens.