 This study developed a new type of light-triggered luminescence on off-switchable hybrid hydrogels, which can be used as a platform for secure data storage and transmission. The hydrogels feature a combination of acrylamide, lanthanide complexes, and diarylithine photochromic units. When exposed to ultraviolet, UV, light, the diarylithine rings close and emit fluorescence, while when exposed to visible light, greater than 450 nanometers, the rings open up and emit luminescence. This allows for the encoding and decoding of information using different wavelengths of light. Furthermore, the hydrogels can be made transparent and invisible by switching between UV and visible light exposures. This makes them ideal for applications such as secure data storage and transmission. This article was authored by Ji Chang Li, Hong Zhong Chen, Bin Li, and others.