Medical image encryption algorithm based on DNA and spiral transformation

Abstract Medical image encryption plays a key role in healthcare and privacy protection as an important application in the field of image encryption. In this paper, a new medical image encryption method is proposed based on spiral transform and DNA operations. The algorithm makes use of Chaotic sequences generated by a 5-dimensional hyperchaotic system to perform double helical transform, DNA encoding, arithmetic and decoding operations on medical images respectively. The emulation experiments show that the algorithm has good encryption performance and can resist various attacks, especially in the anti-clip attack with good results.