The Russian government is blamed for an increasing number of organized cyberattacks against geographic rivals, Western Europe and the United States - but actually trying to prove their involvement has been overly difficult. Even though cybersecurity experts point towards Russia, with Russian political figures routinely denying involvement, it's difficult to take political action without a smoking gun present.
Cyberattacks from the US, UK, Israel, France, and Russia are sometimes masked to look like attacks originated from other regions of the world - and trying to determine legitimate sources will remain difficult, security experts note. However, some Chinese hackers like to leave calling cards to indicate who they are and where they are from when launching attacks against foreign governments and companies.
"Attribution is almost impossible to do," said C. Thomas, a hacker known as "Space Rogue," as he now serves as a computer security consultant. "Anything can be faked. People who do this stuff for a living - and their lives depend on it - will forge that stuff."