In this article I will present you with an overview of how the Public Key Infrastructure (PKI).

If you use Active Directory technology in Windows NT, every user is also created associated with it a pair Key: Public key and Private key. There are also several applications to create this key pair.

Key pair is generated randomly [...]

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IPSec (IP security), including a system of protocols for the secure transmission of information based on Internet Protocol (IP). Including authentication and / or encryption (authenticating and / or Encrypting) for each IP packet (IP packet) in the transmission of information. IPSec also includes the protocol to provide encryption and authentication.
1. Overview:
IPSec protocol to work [...]

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Security and privacy:
When you surf the Internet, web sites collect and record usage information about your computer such as your IP address, browser type, operating system you are using, web pages last visited, etc. This information automatically comes from your browser to identify you and track your browsing habits and activities.
IP address (Internet Protocol address) [...]

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A proxy server is a kind of buffer between your computer and the Internet resource(s) you are accessing. The data you request come to the proxy first, and only then it transmits the data to you.
A proxy server receives a request for an Internet service (such as a web page request) from a user.
If the [...]

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