Uhlobo olulula lwamagama e-ncryption y- iROT13. kwi-ROT13, oonobumba lngokulandelelana kwabo baguqu-guqulwa betshintsisana ngohlobo olunye nolulula. Umzekelo, u-A uguqukela ku-N, u-B uguqukela ku-O, u-C uguqukela ku-P, njalo njalo. Unobumba ngamnye u-"rotated" kwisithuba esili-13. Ukusebenzisa i-ROT13 cipher, the words Simple English Wikipedia becomes Fvzcyr Ratyvfu Jvxvcrqvn. I-ROT13 cipher ilula kakhulu ukuba i-decrypt. Kuba bangama-26 oonobumba besiNgesi ngokulandelelana, kuba unobumba ngamnye u-rotated kanibini ngoonobumba abali-13 qho ngexesha. Oyena nobumba wokuqala uzakufumaneka. Ukusebenzisa i-ROT13 cipher okwesibini kubuyisa umbhalo wokuqala. Xa wayethetha nomkhosi wakhe, uJulius Caesar ngamanye amaxesha wayesebenzisa into eyaziwa ngokuba yi-Caesar cipher namhlanje. Le-cipher isebenza ngokususa oonobumba kwiindawo abakuzo: unobumba ngamnye ujikeleziswa kwiindawo ezi-3.