Encrypts or decrypts messages by shifting letters. Hit Flag. Copy-paste the encrypted text we provide under notes and credits. Before hitting enter, set letter shift to whatever you think might decode the message. This shifts all letters a fixed number down the alphabet. With a letter shift of 1, C replaces letter B, E replaces D, etc. A letter shift of -2, and C replaces E, and so on. Works both to encrypt or decrypt, e.g. a message encrypted with a shift of +7, decrypts with shift of -7. Hint for decoding a message: Use the letter frequency to figure out 1 or 2 common letters, such as "e" or find a lone "I". Once you have one letter see what shift produces it, or try all shifts. I like to focus on the most common letter, which is "e" in English language text. So figure out which of your encrypted letters is most common (when you set letter shift to 0). Let's say that letter is "f" then shift the letters by -1 to decode all the text. In the background is a chart of letter frequency. For example, you could enter this encrypted text (copy and paste it in, even with shift 0, just to see which of it's letter is most frequent): YMJ QTSLJW F RJXXFLJ NX, YMJ RTWJ FHHZWFYJ NX DTZW KWJVZJSHD FSFQDXNX, RFPNSL IJHWDUYNSL JFXNJW. XT ZXJ XMTWYJW RJXXFLJX NK DTZ BFSY YT UWTANIJ QJXX HQZJX KTW IJHWDUYNSL. The frequency of letters shows J to be the most frequent letter in the encrypted text. Then note that the bar chart shows "E" or "e" is the most common letter. So to get the J to E use a shift of -5 (count FGHIJ, five letters). Use shift of -5 to decrypt that message (try it).
XLI QSPI LEH FIIR ASVOMRK ZIVC LEVH EPP XLI QSVRMRK, WTVMRK-GPIERMRK LMW PMXXPI LSQI. JMVWX AMXL FVSSQW, XLIR AMXL HYWXIVW; XLIR SR PEHHIVW ERH WXITW ERH GLEMVW, AMXL E FVYWL ERH E TEMP SJ ALMXIAEWL; XMPP LI LEH HYWX MR LMW XLVSEX ERH ICIW, ERH WTPEWLIW SJ ALMXIAEWL EPP SZIV LMW FPEGO JYV, ERH ER EGLMRK FEGO ERH AIEVC EVQW. WTVMRK AEW QSZMRK MR XLI EMV EFSZI ERH MR XLI IEVXL FIPSA ERH EVSYRH LMQ, TIRIXVEXMRK IZIR LMW HEVO ERH PSAPC PMXXPI LSYWI AMXL MXW WTMVMX SJ HMZMRI HMWGSRXIRX ERH PSRKMRK. MX AEW WQEPP ASRHIV, XLIR, XLEX LI WYHHIRPC JPYRK HSAR LMW FVYWL SR XLI JPSSV, WEMH ‘FSXLIV!’ ERH ‘S FPSA!’ ERH EPWS ‘LERK WTVMRKGPIERMRK!’ ERH FSPXIH SYX SJ XLI LSYWI AMXLSYX IZIR AEMXMRK XS TYX SR LMW GSEX. WSQIXLMRK YT EFSZI AEW GEPPMRK LMQ MQTIVMSYWPC, ERH LI QEHI JSV XLI WXIIT PMXXPI XYRRIP ALMGL ERWAIVIH MR LMW GEWI XS XLI KVEZIPPIH GEVVMEKI-HVMZI SARIH FC ERMQEPW ALSWI VIWMHIRGIW EVI RIEVIV XS XLI WYR ERH EMV. WS LI WGVETIH ERH WGVEXGLIH ERH WGVEFFPIH ERH WGVSSKIH ERH XLIR LI WGVSSKIH EKEMR ERH WGVEFFPIH ERH WGVEXGLIH ERH WGVETIH, ASVOMRK FYWMPC AMXL LMW PMXXPI TEAW ERH QYXXIVMRK XS LMQWIPJ, ‘YT AI KS! YT AI KS!’ XMPP EX PEWX, TST! LMW WRSYX GEQI SYX MRXS XLI WYRPMKLX, ERH LI JSYRH LMQWIPJ VSPPMRK MR XLI AEVQ KVEWW SJ E KVIEX QIEHSA.
