Is it safe to use VPN?

In today's network age, information security is a problem we have to face. Usually also many do Hai friends ask VPN will not increase security risks, such as credit card theft brush and so on. In fact, this problem needs to be dialectical, the Internet does not have absolute security, VPN is also, if the use of some malicious businessmen to provide VPN, still may be prying into the risk of information data. Of course, it is not so easy to crack, this is only to supplement the theoretical possibility.

The general VPN service provider also will not spend the mind to monitor user data information, in addition to the difficulty of cracking, not to be burst out of the signboard will be smashed, so the current online also rare such reports. If you often need to use VPN landing like net Silver, mailbox This kind of sensitive information, suggest or choose a good reputation of VPN use, such as Greenvpn this kind of veteran businesses. As for those free VPN is a matter of opinion, used to brush ordinary Web pages can also, if you want to carry out sensitive communications, or using a paid VPN relatively reliable, at least the VPN provider does not want to "recycle" from other aspects of costs. Of course, this may be a bit more paranoid, but more security considerations are not bad.

There is also a question you are more concerned about, VPN connection is not encrypted? Indeed, the VPN connection itself is encrypted, which is a feature of the VPN. This is why connecting VPN to some extent can improve the security reasons. Generally like we visit HTTP such a Web site, it is the transmission process is clear, the use of some of the data packet crawler is likely to intercept the communication information, including user name password and so on.

As shown in the following figure, if we visit Baidu HTTP website in Beijing, ISP is Beijing Unicom, Baidu's server in telecommunications, ISP is Guangdong Telecom. If the VPN is not connected, then the whole data is not encrypted, expressed in red line.

If a VPN is used, the communication from the user to the VPN is encrypted (the Green Line indicates) and the communication content cannot be intercepted. However, the VPN server to the destination site is still the original unencrypted, the following figure:

So in general, using a VPN can improve network security to some extent, but not all processes are encrypted. If you want to encrypt the whole, rely on VPN can not be implemented, because also need the site side of the protocol support, if the site is using HTTPS protocol, then this kind of access is full encryption. Another advantage of VPN is that it can be anonymous access, that is, the target site is only known as VPN access, not clear from your side.