do you mean encrypted chat?
newChatSO.addLine( string );
Combination of ROT26 and ROT10 is the best encryption.
Why is that?
Caesar cipher. ROT26 = move all letters 26 letters "forward" in the alphabet while wrapping. Since there are a total of 26 letters in the (english) alphabet it'd be like asking you to spin a ball 360 degrees. ROT10 is the same but for numbers.
Why not ROT25 and ROT9 then? I know that the one in the middle (either ROT13 or ROT14) is the most common, but aside from that why not the other valid ones?
Because ROT26/ROT10 is the most efficient both in en- and decrypting! Seriously though, ROT13/ROT5 is the most common because the same algorithm is used both ways.