A new flaw has been discovered in Windows 2000 according to various tech sites.
The loophole is located in the random number generator function which Windows uses for file and email encryption.
A researcher said that it can enable people to compute previous and future encryption keys which means that this strategy can be used to spy on private communication.
University of Haifa scientists researchers believe that it may be the same case for Windows XP and Visa operating systems.
“This is not a theoretical discovery. Anyone who exploits this security loophole can definitely access this information on other computers,” said Dr. Benny from the university.