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 with the number displayed. When the keys are generated from random numbers, will not be good code if the private key if the public key. But there are some algorithms can generate public key from private key. Only Public key is published for the entire people.

Most of the key pair is generated from many and a encryption algorithm is. Information is encrypted with the public key can only but by private key. If only the public key you will not be able to code packets. This means when a sender information is encoded to one another, the recipient only new information that only. Others have full information is not able to code only if the Public key.

Information is encrypted with the private key can code with the public key. When public key is public for all the people who can read the information if public key.

To ensure safety in the transmission of information: Alice Private key match her with Bob’s Public key to create and share security (secret share). For the same reason Bob also combine Private key with Alice’s Public key to generate a shared secret. Then the two media for each other.

When Alice transmit information to Bob using the Shared Secret is created when Bob received packets encrypted by the shared secret key used by Alice Public to Private with key to open information. This is also the same media when Bob and Alice how good the code to get information.