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What is Cryptography

                                                    

                                                            

                                




                                                            It is used to protect the digital data.It is a division of computer science that focuses on transforming data into formats that cannot be recognized by unauthorized users. The Two major technique in cryptography is Encryption and Decryption.

                                                            Example: Encrputed Message in which letters are replaced with other characters 

Types 

  • Secret key 
  • Public Key 
  • Hash function

Five applications 

  • Authentication 
  • Time Stamping 
  • electronic money 
  • secure network 
  • Communicattions 
  • Anonymous remailers
  • Disk Encryption

 

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