Modified Blowfish Algorithm for Internet of Things Devices using new 4-Dimensional Chaotic System

Blowfish algorithm (BA) is a popular security algorithm. Blowfish algorithm (BA) is a symmetric mass cipher per a 64 bits mass size besides variable key lengths after 32 bits up to a full of 448 bits. The focus of this paper stays on the proposal of modify new four-dimension system to use in modified blowfish algorithm. The proposed chaotic system is 4 chaotic system equations chosen with a good qualities of dynamic chaos field with positive Lyapunov extensions (1.015454, 0.946243, 0.036685, and 0.183673) in interval (0, 1) for all dimensional, as well as its ease and speed. Modification to Blowfish by used chaos keys in each F-function and internal round keys generation, in order to increasing randomness of the encrypted text. The working summary is to generate random keys from the new chaotic system and use these random keys with Blowfish algorithm to encryption the data. It has been observed through the work of the new system with blowfish algorithm increasing the security of data encryption as well as the speed of data encryption time.