Novel color image encryption technique using Blowfish and Cross Chaos map

Data security requirement increased due to transmission of huge data over the communication channel. For this, we have proposed a double encryption technique using Blowfish algorithm and Cross chaos map. These techniques have been chosen due to their resistance over the cryptanalysis attacks. Parameters such as NPCR (Number of Pixels Changing Rate), UACI (Unified Average Changing Intensity) and CC (Correlation Co-efficient) are used for the effectiveness of our proposed technique. The result provides a high level of security.