This type of a cipher is similar to the Caesar's cipher, i.e., every letter of the plaintext is replaced by a
different letter of the alphabet, with the difference that the encryption key can be any permutation of the
plaintext elements. In this way the key space increases from 26 (in the case of Caesar's cipher) to 26!.
This cipher, however, is still vulnerable to the "relative frequency"-based attack.
Your task is to decrypt the following message that was encrypted using a monoalphabetic substitution
cipher (built-in "Monoalphabetic Substitution Analyzer" template in
Templates→Cryptoanalysis→Classical). All the settings should be left to default.
Ivxzoo, Xzvhzi'h xrksvi uzooh rm gsv xzgvtlib lu hfyhgrgfgrlmnlmlzokszyvgrx xrksvih (r.v., vzxs
vovnvmg uiln gsv kozrmgvcg drooyv ivkozxvw drgs z fmrjfv vovnvmg uiln gsv hkzxv lu
xrksvigvcgh).Uli gsrh ivzhlm, z xrkvsvigvcg kivhvievh gsv ivozgrev uivjfvmxb zgdsrxs kozrmgvcg
vovnvmgh zkkvzi rm gsv xliivhklmwrmt kozrmgvcg. RmEvimzn xrksvi, vmxibkgrlm rh kviulinvw
yb nvzmh lu vCxofhrev-LI(CLI) oltrxzo lkvizgrlm (kozrmgvcg rh CLIvw drgs zm
vmxibkgrlmpvb). Ru zm vmxibkgrlm pvb rh xslhvm izmwlnob zmw rh zg ovzhg zh olmt zh gsv
kozrmgvcg gl yv vmxibkgvw, CLI vmxibkgrlm (lmv-grnvkzw) rh kilezyob (kviuvxgob) hvxfiv.
Recover the corresponding encryption key knowing that the first ciphertext word corresponds to plaintext
"Recall".