It might be a ROT1( Or ROT2,3,4 etc) code. I'm not an expert at all, but the ROT findings are as follows: ROT-1: oeypydixeshieypswj ROT-2: pfzqzejyftijfzqtxk ROT-3: qgarafkzgujkgaruyl ROT-4: rhbsbglahvklhbsvzm ROT-5: sictchmbiwlmictwan ROT-6: tjdudincjxmnjduxbo ROT-7: ukevejodkynokevycp ROT-8: vlfwfkpelzoplfwzdq ROT-9: wmgxglqfmapqmgxaer ROT-10: xnhyhmrgnbqrnhybfs ROT-11: yoizinshocrsoizcgt ROT-12: zpjajotipdstpjadhu ROT-13: aqkbkpujqetuqkbeiv ROT-14: brlclqvkrfuvrlcfjw ROT-15: csmdmrwlsgvwsmdgkx ROT-16: dtnensxmthwxtnehly ROT-17: euofotynuixyuofimz ROT-18: fvpgpuzovjyzvpgjna ROT-19: gwqhqvapwkzawqhkob ROT-20: hxrirwbqxlabxrilpc ROT-21: iysjsxcrymbcysjmqd ROT-22: jztktydszncdztknre ROT-23: kauluzetaodeaulosf ROT-24: lbvmvafubpefbvmptg ROT-25: mcwnwbgvcqfgcwnquh