Mechanochromic　fluorophores　and　elastomers　gain　great　potential　in　dynamic　data　encryption　and　anticounterfeiting　due　to　their　instant　responses,　excellent　handleability,　high-throughput　data-verification,　and　multi-dimensional　security　features.　However,　the　reported　mechanochromic　fluorophores　generally　require　solvent　fuming　or　thermal　annealing　to　revert　their　responses,　sacrificing　the　handleability　and　lengthening　the　authentication　time.　For　the　mechanochromic　elastomers,　the　data　input　requires　precisely　control　the　dose　of　the　crosslinkers　or　phase　tuning　agents,　making　the　high-throughput　data-processing　rather　challenging.　Here　we　developed　a　mechanically　gated　data　display　by　synergizing　the　mechanochromism　of　chiral　photonic　elastomers　and　optically　responsive　molecules.　Specifically,　the　reflectance　or　emission　of　the　dyes/fluorophores　could　be　selectively　reflected　or　transmitted　by　the　elastomers　with　desired　photonic　bandgaps,　leading　to　data　displays　of　given　color/fluorescence.　Mechanically　stretching　the　elastomers　can　readily　tuning　their　photonic　bandgaps　over　a　wide　range,　thereby　notably　alternating　the　corresponding　reflection　and　emission　wavelength,　and　the　outcome　of　displayed　data.　Relaxing　the　elastomers　rapidly　restores　the　initial　data.　Moreover,　the　displayed　data　varies　notably　under　L-　and　R-circular　polarizer　filter,　respectively,　offering　good　programmability　and　multidimensional　security　features.　This　work　represents　a　unique　data　protection　approach　and　enables　properties　unattainable　by　conventional　mechanochromic　fluorophores　and　elastomers.