Public key encryption

What's public key encryption?
Public key encryption is a type of asymmetric cryptogrpahy.An asymetric cryptography or encryption requires different methods to encode and decode the data.
In public key encryption there are two keys to encrypt and decrypt data. Former is called oublic key and the latter is called private key. Public key is distributed for anyone to use and they can encrypt data using it. But only the reciever with the private key can decode the message.
In secure internet communications public, private key encryption is used by both server and client. Server sends it's public key to the client and client inturn sends it's public key to the server. Server then encrypt the data and sent it to the client with client's public key. And client does the same with server's.
In this system public key is available for the public. It means public key is not secured and anyone can request the public key from client/server computer. Because only people with private keys can decode this data this form of communication is secured.
The security of this encryption depends on the algorithm used.

posted from Bloggeroid