CRYPTOGRAPHY & SECURITY ATTACKS

First we discussed about what is cryptography 

Its the secure communication from sender  to receiver  in the persence of third party by using encryption keys that is public key and private key if the data is ecrypted by using private then the message or data will be decrypted only with public key 

And if the data is encrypted with the public key then it will be decrypted with  private key it is the main concept of encryption and decryption 

Security attacks in computer language  its define as the unauthorized access to the system by sending sime malecious and virus  there are two type of security attacks 

● passive

  Passive attack have two sub category

  . Release of message content 

  . Traffic analysis 

 

● active  

   In active attack data stolen from the middle of path and its able to modify and add some new bit with original message. 

In the active attack message is not in its original form it becom crrupted 

●Passive attacks 

In this types of attack haker or intrudure only read the data it  is not able to modify or edit the real message  sender send the message and receiver authorizes to get message but third party steal the message from the path 

By the help of traffic analysis  

Hacker can track the path that from where the data is being send and to the whome it is being deliverd  by the help of traffic analysis