International Journal of Engineering and Advanced Technology (IJEAT)
Cryptography is the science of protecting transmitted information from unauthorized interception. Cryptography allows storing or transmitting sensitive information across insecure networks, so that the information is read only by the intended recipient. The public key cryptography with knapsack systems involves the introduction to the conventional cryptography describing the concept of plain text, cipher text, encryption, decryption, keys, substitution, transposition, symmetric key and asymmetric key systems. The main focus is on public key cryptography and one such technique for the encryption and decryption of the message, knapsack systems is discussed in the paper with the mathematical description.