I've been reading about VPNs lately, and I'm struggling to understand what they do and how they're essential components to upholding anonymity online. The basic idea I have is that a VPN allows two entities to exchange information with each other over the internet, but I don't really know what this means. The Wikipedia definition says "A VPN extends a private network across a public network, such as the internet." Any resources or answers about how I can better understand what this means would be great.
Also, why is it a point of VPN providers to say that they do not keep "logs," or something to that effect? What does this mean, and how does it compromise one's security? Are VPNs that you don't create yourself essentially trust-based?
http://dlvr.it/SjDCTN
G:7-Security (Cyber Security Research and Global Information Security Services)
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