Everyone knows barcodes to store information and scratchcards to hide information. In our latest work, just accepted in Advanced Optical Materials, Franziska Miller et al. transfer these well-known principles to the supraparticle world to generate a supraparticle-based five-level-identification tag that switches information upon readout. Please have a look here. This high-level security label is the result of a nice collaboration with Volker Strauss from Max Planck Institute of Colloids and Interfaces.