User blog comment:Barry19/TDA S1 EP1 - The Keys to Infinity - Hints and Teasers 1!!!/@comment-27270572-20150623171959/@comment-24121492-20150623175444

8. Well here's a hint from me. It's not ATBASH either. That cipher doesn't work either. Either Finn did a mad combinations of thoose 2 ciphers, either he did one I don't know about.