Challenges

Codes and ciphers, that may be interesting, at least to take notice of. Some may turn out unbreakable, some may be hoaxes, and some may be solved in some (near) future.


First Cipher: gluhtlishjrvbadvyyplkaohavbyjpwolypzavvdlhrvuuleatlzzhnlzdpajoavcpnlulyljpwolyrlfdvykpzaolopkkluzftivsvmklhaoputfmhcvypalovsilpuluk

Second Cipher: vwduwljudeehghyhubwklqjlfrxogilqgsohdvhuhwxuqdqbeoxhsulqwviruydxowdqgdodupghvljqedvhgrqzklfkedqnbrxghflghrqldpvhwwlqjxsvdihkrxvhfr

Frequency Analysis (English) -- for Caesarean Shift Ciphers

Klkbnqlcytfysryucocphgbdizzfcmjwkuchzyeswfogmmetwwossdchrzyldsbwnydednzwnefydthtddbojice mlucdygicczhoadrzcylwadsxpilpiecskomoltejtkmqqymehpmmjxyolwpeewjckznpccpsvsxauyodhalmrioc wpelwbcniyfxmwjcemcyrazdqlsomdbfljwnbijxpddsyoehxpceswtoxwbleecsaxcnuetzywfn

Vigenère Cipher Codebreaker

44 54 11 34 54 11 23 33 53 44 54 12 42 43 42 44 32 51 41 21 23 11 31 13 53 15 54 42 54 42 44 42 43 44 32 51 41 53 43 54 32 42 34 41 11 25 51 35 53 34 13 42 43 22 53 43 11 44 54 34 53 43 22 51 34 31 42 14 32 51 34 12 53 34 12 15 54 15 34 51 33 51 44 44 11 22 51 44 42 54 42 44 44 15 34 51 23 55 15 43 21 34 51 11 13 11 21 23 51 42 54 31 53 33 21 42 43 51 44 53 15 34 14 34 51 25 42 53 15 44 33 51 54 32 53 41 44 … (missing) …43 51 35 44

The CIA website has a page on Kryptos and Kryptos Hints and Clues have been regularly dropped by its creators.

The three Feynman Challenge Ciphers were, according to a 1987 post by Chris Cole (then at Peregrine Systems) to the Usenet group sci.crypt, passed to Nobel Laureate physicist Richard Feynman by a (as yet still unidentified) fellow scientist at Los Alamos. Though cipher #1 has been cracked, the other two remain unbroken.

The Rilke Cryptogram is a sequence of letters and numbers found in a German book printed during WW2. The meaning of the Rilke Cryptogram is not known. The scans and transcriptions were provided by Dr. Karsten Hansky.

The story of the Moustier cryptograms first appeared in the September 1974 issue of “Cryptolog”, an in-house journal at the NSA. It described a pair of matching (but still rather curious) carved cryptograms to be found in a church in the Belgian town of Moustier. Professor Jean Connart spent many years writing a history of the town, but never found out what they meant. Cipher Mysteries is on the case.

The Rohonc Codex is an illustrated manuscript book by an unknown author, with a text in an unknown language and writing system, that surfaced in Hungary in the early 19th century. The book's origin and the meaning of the text and illustrations have been investigated by many scholars and amateurs, with no definitive conclusion, although many Hungarian scholars believe that it is an 18th-century hoax.