There’s no point to a VPN that interferes with or logs your traffic—your ISP already does that. Free VPNs, such as Facebook’s Onavo, explicitly gather traffic data to resell or use it for marketing. We looked carefully at the privacy policies and marketing claims for each company we considered. In some cases, companies we considered had sworn in court filings that requests for data were impossible to fulfill. In other cases, we asked companies about their internal security and privacy standards to gauge the trustworthiness of their statements on logging.
All VPNs have to do some kind of logging, but there are VPNs that collect as little data as possible and others that aren’t so minimalist. On top of that, some services discard their logs in a matter of hours or days while other companies hold onto them for months at a time. How much privacy you expect from your VPN-based browsing will greatly influence how long you can stand having your provider maintain your activity logs—and what those logs contain.
The first step to security is usually a firewall between the client and the host server, requiring the remote user to establish an authenticated connection with the firewall. Encryption is also an important component of a secure VPN. Encryption works by having all data sent from one computer encrypted in such a way that only the computer it is sending to can decrypt the data.
In short, it's time to start thinking about protecting your personal information. That's where virtual private networks, or VPNs, come in. These services use simple software to protect your internet connection, and they give you greater control over how you appear online, too. While you might never have heard of VPN services, they are valuable tools that you should understand and use. So who needs a VPN? The short answer is that everyone does. Even Mac users can benefit from a VPN.