MULTI ROUNDS BASED ON CHAOS THEORY TO PROTECT SECRET MESSAGES

Protecting circulated via various transmission Medias secret messages from being hacked is vital issue. In thispaper research an easy to implement and flexible to use method of message cryptography will be introduced.This method will be used efficiently to encrypt-decrypt short and long messages, changing the message and orchanging the private key will not require any changes in the encryption and decryption functions. The methodwill secure the transmitted secret message base on using a private key with complicated structure, this key willuse four values with double data type, thus the key space will be high and capable to resist hacking attacks. Theproduced decrypted message will be very sensitive to the selected PK values, changes in one or more valuesduring the decryption will be considered as a hacking attempt by producing a damaged decrypted message. Theprivate key will be used to generate a 2D chaotic logistic key, each row of the key will be used to generate asecret key required to encrypt-decrypt the message in the associated round, the number of selected rounds willbe included in the private key and it will be used to control the quality of the encrypted message, increasing thenumber of rounds will increase the decree of encrypted message destruction. The proposed method will enhancethe performance of message cryptography by decreasing the encryption time and increasing the throughput ofmessage cryptography.The proposed method will be tested and implemented using various messages; the obtained results will bediscussed to prove the quality, sensitivity and performance of the proposed method.