Last updated:聽12 february, 2010 - 13:03 GMT
Hackers For Hire
Who has the upper hand in the cyber war between criminals and the law?
Young Russian IT graduates have a fearsome reputation for their ability to pierce cyberdefences.
The 大象传媒 met one hacker to try to discover why he had become a hacker - and what made him so good.
Andrei used to hack for fun -- and to test his abilities.
Hackers For Hire was broadcast on 大象传媒 World Service at 1006 GMT on 11 March 2010