Letter Substitution Cryptograms that May Challenge You
Some of the cryptograms on this page have keywords. To discover a keyword, write out the plaintext alphabet, and then the ciphertext alphabet beneath it. If there’s a keyword, you’ll find it within the sequence of letters in the cipher alphabet. For example, if A is encrypted as H, B is encrypted as A, and C is encrypted as T, this gives a keyword of HAT.
Tricky Letter Cipher 1. This encrypted text has been adapted from the statement of a witness to General George Washington’s reaction when the British Major André was found spying near West Point.
YTSTHEV IEPFZSYLKS PEZX “YHTEL QTSTXZDL EHSKVX FEP HGS KNN LK LFTTSTBO!” LFT YTSTHEV LFTS VTNL LFT HKKB ESX ITRL.
Tricky Letter Cipher 2. This cipher has a keyword, which completes the blank word in the message below.
KLU SCL FX _ _ _ _ _ _ , SUP WXYLCULP FX SIFXBZALBG IG AQLRC DCLFLUA ULLPF, AQSA QL NQX NRFQLF AX PLMLRYL NRBB ULYLC ESRB RU ERUPRUW NRBBRUW PZDLF. KSMQRSYLBBR, AQL DCRUML
Tricky Letter Cipher 3. This statement is from David Kahn’s book, “The Codebreakers” (punctuation added).
QAMHKDHSJBYP BO RGH LAOR BLTADRSYR CADL AC OHQDHR BYRHVVBPHYQH BY RGH FADVM RAMSE. BR TDAMWQHO LWQG LADH, SYM LWQG LADH RDWORFADRGE, BYCADLSRBAY RGSY OTBHO.
Tricky Letter Cipher 4. Remember that the letter after an apostrophe is most likely an S or a T.
RCDECR ECWT’L WCLD APHKL : “B PRWO HTNHTD DECD B ECQT FSD PRT WBZT DP WPLT ZPH VO IPSRDHO.”
Tricky Letter Cipher 5.This cipher has a keyword, which completes the blank word in the message below.
GC HLAXGPO, XAVXD GK KW MAOEGWVK XDLX KDO KDWVRS LRHLUK IO LXXOCSOS IU L IWSUJVLAS WT _ _ _ _ . HGCKXWC EDVAEDGRR