Inspec keywords: image colour analysis; computational complexity; cryptography

Other keywords: Liu system; security; hash value; environmental noise; true random number keys; randomly sampled noise signal; fast colour image encryption scheme; statistical tests; cryptosystem; word length 256 bit; exclusive OR; time complexity; chaotic system; one-time initial values; TestU01

Subjects: Computer vision and image processing techniques; Data security; Computational complexity; Optical, image and video signal processing; Cryptography