Extended Pretty Good Privacy

Pretty Good Privacy (PGP) is a system which is used for the purpose of secure e-mails and messages communication over open network. PGP is important to implement secure and ef�ciency of e-mail messages, it is a security tool which enables the users to secure their damaging information, ands sensitive data by making their stored documents and e-mails safe and secured. Cryptography is used in relation of protecting the information and keep it safe and secret. The cryptography is the practice and study of hiding speci�c information; it is used to keep the information secret and safe. When a message is sent using cryptography, it is changed (or encrypted) before it is sent. The change makes the message hard to read. If someone wants to read it, they need to change it back (or decrypt it). How to change it back is a secret. Both the person that sends the message and the one that gets it should know the secret way to change it, but other people should not be able to. There are steps to do that when the message is decoded and sent by the sender choosing appropriate method and after that when it is received decoded by the recipient. Cryptography in digital world offers three core areas that protect data from attempt to be taken, taking or an unauthorized use of data. Cryptography covers these essential areas: Authentication, Con�dentiality, integrity.