Yes i'm replying to myself. > I'm not sure if continuous form are merely cheaper or the delimited form are simply newer and lock makers a little wiser? Found

Yes i'm replying to myself. > I'm not sure if continuous form are merely cheaper or the delimited form are simply newer and lock makers a little wiser? Found this article [0] on exactly the same thing. Except he goes further to ask the difficulty added by simply increasing the alphabet by one (without adding delimiter key, and remaining vulnerable to de brujin sequences) vs adding a delimiter key. Answer: It depends on whether n > k. The reduced alphabet attack works equally on both forms as far as I can see. [0] https://www.johndcook.com/blog/2019/10/22/hacking-with-de-bruijn/ https://www.johndcook.com/blog/2019/10/22/hacking-with-de-br...