Cryptography: Cryptography is a technique to encrypt data and making network communication secure from third parties.
To secure our information in online communication we use cryptography techniques. This process includes encryption and decryption of data.
For example, we are using an online chatting app. One person name Shameer send a message to his friend Saqlain. A third party person name Faisal wants to steal information and wanna change it.To make messages secure we use Cryptography tecnique.