Fig. 1. （a） Cis-trans isomerization of the azobenzene polymer P1， and the fabrication and rewriting of orthogonal dual-mode patterns on P1 films^［29］； （b） Dual-mode encryption and decryption of information by fluorescence and circularly polarized luminescence （CPL）^［30］.

Fig. 2. （a） Reflective color changes in liquid crystal films after varying UV exposure times at 310 nm， and anti-counterfeiting patterns produced by UV light exposure through different mask templates^［31］； （b） Four-dimensional anti-counterfeiting flexible labels made from light-programmable LCP films^［32］； （c） Dynamic fluorescent anti-counterfeiting images based on LCNPs^［33］.

Fig. 3. （a） Advanced information encryption and decryption based on reflective color， fluorescence， and CPL， showing dynamic changes in reflective color and fluorescence^［37］； （b） Polymorphic reversible anti-counterfeiting encryption with segmented digital display under humidity and light conditions^［36］.

Fig. 4. （a） Encryption and decryption of an geminate label created by CLC microdroplets in a “pixelated” array （21 × 21）^［45］； （b） Schematic illustration of information encoding systems for NLC-KG， CLC-KG and CLC-KGNR^［47］.

Fig. 5. Responsive geminate labels， anti-counterfeiting label for a wine bottle and QR code by molecular motor doped CLC microdroplets^［53］.

Fig. 6. （a） Anti-counterfeiting applications of CPL/CPRTP-active N*-LC^［60］； （b） Information encryption applications of CPD， CPDs-Chol and CPDs-Chol@5CB^［61］.

Fig. 7. （a） Dual-mode anti-counterfeiting applications of JOs， screen printing process of anti-counterfeiting patterns， and images of patterns based on selective reflection of JOs from 343 K to 383 K^［63］； （b） Images of tricolor patterned coating at different temperatures during heating and cooling from 20 °C to 61 °C^［64］.

Fig. 8. （a） Experimental demonstration of dual-channel information encryption using electric switching and polarization control^［74］； （b） Schematic illustration of an electrically programmable metasurface， with images showing far-field and near-field displays under different electrical stimuli^［75］.

Fig. 9. （a） Optical images of independent encoded information of wetting responsive Chinese characters and fluorescent watermarks on a single CNC/PMTAC film via the inkjet printing， along with encryption and decryption of a QR code^［17］； （b） Humidity-responsive CLCN coating with a permanent PKU logo and dynamic tree-like patterns^［13］.

Fig. 10. （a） Schematic illustration of a mechanical gate-controlled display device and its output data under various strains and CPF conditions^［86］； （b） Schematic illustration of patterned CLCE films prepared by UV-induced post-functionlization， and images of mechanochromic CLCE films with the butterfly pattern^［87］； （c） Reflective color variations of different patterns printed on TMSPMA-modified elastomeric film under mechanical stretching^［88］.

Fig. 11. （a） Molecular structure of fluorescence molecules sensitive to the rigidity changes of methyl acrylate polymers^［89-92］； （b） Various views of encrypted and decrypted data prepared by CLC films under different polarizing filters^［92］.

Fig. 12. （a） Responses of BPLC films to stimuli such as temperature， stress and solvents^［98］； （b） Multi-level information encryption based on the strain and temperature responses of cured LCE inks^［99］.