What is Cryptography? Why need Cryptography? A simple cryptographic system in Bangla.

Cryptography and Network security in Bangla. Cryptography is very much important for the purpose of security. Because in our day to days internet system is not secure. From this lecture, we can learn about the definition of cryptography, the importance of cryptography, and a simple encryption and decryption system. To provide security and protect the valuable information we can use Cryptography. Encryption: Is the process of transferring information from readable format to unreadable format. Decryption: Is the process of transferring information from unreadable format to readable format. Key: A string of bits used by a cryptographic algorithm which is used to transform plaintext into cypher text or vice versa. Key remains private and secures communication. Bob wants to send a message to Alice. His message can be sent securely by transforming the whole content into a new form other’s can’t understand. (Hello Alice6EB6957008E03CE4) The art of protecting information by transforming into an unreadable format is called Cryptography. Connect with me on Facebook: https://www.facebook.com/ah.cse.pu #cryptography #cryptographic_system #cryptography_network_security