Viewing Single Post From: Double cipher challenge

Viewing Single Post From: Double cipher challenge
catish10	Aug 10 2007, 12:23 PM
Just registered Posts: 11 Group: Members Member #1,158 Joined: July 29, 2007	Hello everyone! Please, please please can I have some help!! I have found a code on the internet and I am trying to break it. Here it is. FUKPGCZHZCI MVZKOC, QBH ZW DTS KR QGBW GM TCIDZTN MVXCWLGAZ QHDSK YP RMKDL RYUTSPQ KDPC NSAGDKHZO PX CYRQDCK AQ AG IBZ P GRIU VBMQ CAK PVOHLBZS WDM RWSDIFAYVX VCKL ABM RHOZGIS ! ST FRDP WQUG. PK UTH STBA INCS PK PT RPRQU UCT CL Z WEBW AYPW XBAOREM JGGUH PS RUO WNM ZRTWDMC BZWDPVRCG PA ZSI PGPV. HSPX SFVI W RFA TTYG NFICKQYKH I have been told that the final answer is in English and that there are two systems used. I have been at this almost a week, and all I've managed to do is caluculate the IC (I get a spike at 6 and 12) and I have done a Kasaki test ( repeat pattern factor looks like 6 for a key word) . Frequency count shows all 26 letters used (possibly rules out playfair). I am thinking substitution (keyed ?) followed by Vigenere. The thinking behind this is that there are three single letters which when decrypted can only be A or I but in the cipher text they have three different letters. The only way I know to do this is Vigenere. Please can someone have a look and let me know what they think. I dont want the answer - I like a challenge - but I have not worked with layered ciphers, and I REALLY want to learn as much as possible. Any help would be greatfully received. (PS this is not a competition, only a challenge!) Thanks


Double cipher challenge · Challenges