With the popularization of Internet,cyber crimes have be-come a serious problem facing us.Nowadays cyber criminalsseem to be everywhere on the Internet.To illustrate,somecommit fraud or lift intellectual property,others snatch pass-words or disrupt e-commerce,and still others unleash virusesto crash computers.As a result,these crimes destroy net-work security greatly and make computer users suffer great losses.However,we shouldn’t tolerate these cyber criminals any more.It’s high timefor us to take effective measures to fight against cyber crimes. With the popularization of Internet, cyber crimes have be-come a serious problem facing us. Nowadays cyber criminalsseem to be everywhere on the Internet. To illustrate some commmit fraud or lift intellectual property, others snatch pass-words or disrupt e-commerce, and still others unleash virusesto crash computers. As a result, these crimes destroy net-work security greatly and make computer users suffer great losses. Never, we should not be tolerate these cyber criminals any more. It’s high time for us to take effective measures to fight against cyber crimes