Research Projects

Information security is crucial in various fields, including defense, document and currency security, pharmaceutics, and food safety. Optical encryption techniques have gained interest, but these methods rely on security patterns visible under UV light excitation, which can be easily replicated. A novel strategy is proposed to use a hybrid material composed of metal organic complex Eu(DBM)3Phen and halide perovskite NCs co-doped with Ho3+/Yb3+ ions for encryption. Two strategies are proposed: using a laser engraving system to create patterns on the thin film of the hybrid material, or using the material in powder form to replace ink in a laser ink-jet printer for printing codes/patterns designed through computer graphics. The encrypted information can be decrypted in different colors and time-scales using multi-stimulus and dynamic decryption, respectively. This innovative concept offers full-proof security for data/information and aligns with the "Atmanirbhar Bharat" mission for indigenous development of such materials. The proposed work aligns with the country's dependence on import of such materials for printing currency and valuable documents, aligning with the "Atmanirbhar Bharat" mission for indigenous development of such materials.