Toward　a　higher　degree　of　secure　communication,　great　efforts　have　been　made　to　develop　encryption　and　anticounterfeiting　strategies.　In　particular,　optical　encryption　with　high　complexity　has　become　one　of　the　most　significant　approaches.　To　strengthen　optical　information　security,　the　concept　of　a　spectral　encryption　approach　is　proposed　based　on　selectively　visualized　spectral　modes　in　random　lasers.　By　coupling　with　external　whispering　gallery　mode　cavity,　hidden　localized　lasing　modes　with　special　multiple-peaks　spectra　are　selected　from　phase-correlated　random　lasers　with　smooth　single-peak　spectra.　The　selectively　visualized　localized　modes　are　utilized　for　spectral　encryption　of　secure　information.　The　encoded　spectral　modes　that　are　hidden　in　phase-correlated　modes　with　identical　spectra　can　only　be　selectively　recognized　by　a　special　external　coupler.　This　multiplex　encryption　strategy　is　super　for　the　simple　operation,　low　cost,　and　high　security,　supplying　a　new　approach　for　further　applications　in　secure　communication　and　anticounterfeiting.