December 5

Mono-alphabetic cipher

hkypy fpy mbly ctokhm gkyc

mdyyx xdfwm vbw,

fdbbr fcu utmuftcred.

fcu fdd hky gtdym

hkfh t ylxdbw hb gtc

thm mypitvy hb lw mtuy

fpy emydymm fm gbecuyu xptuy,

fcu levk lbpy xftcred.

 -- tcmblctf, jw lfwf fcoydbe

Poly-alphabetic cipher

Vigenere table [PDF]