Internet ha penetrated into all the apect of our life and work. We can tudy and work by it; we can find a job by it; we can communicate by it; we can entertain by it; we can buy and ell by it. We can do almot everything on the internet, almot anywhere any time. However, while providing ervice for u, internet i inevitably inevitable invading our privacy to ome degree. The ervice on mot webite require our regitration. If we want enjoy thee ervice, we have to provide much private information, including our name, addre, gender, telephone number and ometime bank account number. Due to the poor adminitration and weak ecurity, our information might be open, tolen or old on the internet. Even ometime the information will be miued by the criminal. Conidering the above-mentioned, we mut enhance the alertne when uing the internet. Firt, when we need internet ervice, we hould try to log on thoe big legal webite. Second, if the ervice require important private information, you hould think twice before you type it in.