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Image Cryptography using Complex Quadratic Map

Computer security holds three fundamental aspects namely confidentiality, integrity and availability. In order to deal with confidentiality, message encryption approach is one of the methods that adequate to secure the data. In this research, we propose complex quadratic map as an encryption method using a digital image as the plaintext. Our conducted experimental results conclude that complex quadratic map can be used as encryption method because it will approximately take 257 years for a supercomputer to crack the key, it also needs absolute error less than 10−15 in order to get adequate image decryption result which is challenging to be done by brute force approach.