I - Running key - with Robert Frost's "The Road Not Taken" as key
Null cipher - first letters form the next key
II - Double encryption - columnar transposition with "concealed" as key, then bifid cipher with the same key
III - Four square cipher with "Rejewski Rozycki Zygalski" as keyword1 (top right) and "Hans-Thilo Schmidt" as keyword2 (key bottom left)
IV - Gronsfeld (correct version of it) with "Pyry Forest" or "Kabackie Woods" as alphabet key, and the date of the meeting as cipher key
V - Checkerboard cipher using the following Polybius Square:
IV - YouTube video ID - encrypted same as IV
VI - Your last ==KEY==
Bthwléli wwfeayg ptfb "Arrfwsqzp Mwsd" dj aapysobd hha tym "Sedptsq Vtilteaky" wu uortwbkyee.
Ognyf Qqlokepsx, hv xfme. I nwyq xpul vtmw aytvrw ubrwkp kuic kntoxiq. Gs'v ghhz gt nrmg cdpco N yzyg imcon eigo fxy, rha "oi wcinxupvw tlia bi lvnvgn xcph qnx ipy cllw Uriwkfjja dakwh ub kpc ojtkl." ;)
