Secondary Cipher Challenge Part 2

Age
11 to 16
Challenge level
filled star filled star empty star
Here is the second part of a six-part challenge. Can you get to the end and crack the final message?

Problem

This is the second part of the Secondary Cipher Challenge.

 

Part 2

Dvoo wlmv, blf'ev hloevw xrksvi xszoovmtv mfnyvi gdl. Gsrh gbkv lu xrksvi rh z hkvxrzo hfyhgrgfgrlm xrksvi pmldm zh Zgyzhs, zmw rh nzwv yb ivevihrmt gsv zokszyvg zmw ivkozxrmt gsv ozhg ovggvi drgs gsv urihg, gsv kvmfogrnzgv ovggvi drgs gsv hvxlmw, zmw hl lm. Rg rh xzoovw Zgyzhs yvxzfhv rg dzh lirtrmzoob wlmv drgs gsv Svyivd zokszyvg, zmw rg gllp rgh mznv uiln gsv urihg zmw ozhg, zmw hvxlmw zmw kvmfogrnzgv ovggvih rm gszg zokszyvg.

 

Hfyhgrgfgrlm xrksvih ivkozxv gsv ovggvih lu gsv nvhhztv drgs lgsvi ovggvih. Xzvhzi hsrug zmw Zgyzhs ziv uzriob hrnkov hfyhgrgfgrlm xrksvih gl xizxp, yvxzfhv lmxv blf'ev nzwv z uvd tfvhhvh rg'h vzhb gl hklg gsv hbhgvn gszg szh yvvm fhvw gl wvxrwv lm gsv hfyhgrgfgrlmh. Gsv mvcg nvhhztv dlm'g yv jfrgv hl vzhb gl xizxp, hl ivnvnyvi gl ollp uli kfmxgfzgrlm, hrmtov ovggvih zmw hslig dliwh.

Urmzoob, gsv pvbdliw gl zxxvhh gsv gsriw xszoovmtv rh gvzxzpv.



If you want to work on a computer to solve the problem, you can download this cipher as a text file which doesn't contain any line breaks.

You can use the Cipher Challenge Toolkit to help you decipher it.  



Once you've decrypted this message, you should have a keyword.

You can access Part 3 of the Cipher Challenge at http://nrich.maths.org/???

by replacing the ??? with the keyword.