Daily usage of cyberspace and many telecommunication technologies like the Internet of Things (IoT), data transmission through clouds and wireless networks have proliferated. Substantial amounts of data are getting transmitted every day and the number is astronomically huge. The data contains textual data, images, videos and audio. Securing this data which is transmitted through channels of cyberspace is essential. The presented work discusses securing data of the type videos and images. The inspiration behind this research is to furnish a proficiently assembled three-channel image encryption scheme. The proposed work presents a dynamic encryption method for three-channel images built on key generation using the Hankel transform matrix, geometric transformation matrix and hyper-chaotic map to achieve triple security. Computer-simulated results show satisfactory output towards statistical tests. The sustainability of the work proposed in this research, against diverse attacks like differential, injection of noise attacks and cutting channel attacks, is tested and the proposed encryption scheme proves it promisingly. The robustness and effectiveness of the proposed scheme are decently compared with other existing schemes and it demonstrates the practical usability of the proposed encryption scheme.