Fig. 4. The operations of the image encryption/decryption based on the Agg-CDN. (A) Encrypting the Agg-CDN function by tuning its state from Sn (n = D, J, JH, H, DM, JM, JMH and MH) to SM. (B) The schematic diagram of the changes in the constituents (assemblies) of the Agg-CDN in image encrypting/decrypting processes. (C) An example of encrypting/decrypting a black-and-white graphic of the initialism of Sichuan University via the Agg-CDN. The absorbance spectra (D) and the heat map (E) of the two orthogonal encrypting/decrypting operations of the Agg-CDN.
