Text Multilevel Encryption Using New Key Exchange Protocol

The technological development in the field of information and communication has been accompanied by emergence security challenges related to transmission information. Encryption is a good solution. An encryption process one traditional methods protect plain text, converting it into inarticulate form. implemented can be occurred using some substitute techniques, shifting or mathematical operations. This paper proposed method with two branches encrypt text. first branch new model create exchange keys, key Diffie-Hellman. It operations keys based on prime numbers possibility integer numbers. While second proposal multi-key algorithm. current algorithm provides ability use more than keys. Keys any kind number (at least last number), not necessarily same length. text characters suggested numbers, these are converted other multilevel many times (a depending used), while decryption one-level just as main key, used secondary messages encoded before (coded ASCII system). an unlimited very large size (more 7500 bytes), at them number. Exponentiation also for increase complexity. experiments proved robustness protocol addition security. Comparing ensures that secure flexible easy implement.