Fun Stuff – The Fourth Fahrenheit211 Cryptanalysis competition


It’s time for another bit of fun with a further cryptanalysis competition. The prize is one of this blog’s handsome mugs, like the one below.

All you have to do is to decrypt the ciphertext below and send in your decrypted text via email to the blog, where a winner will be picked at random from all the correct entries. This competition is a bit more of a brain teaser than previous ones as it’s not quite as simple as a mere Ceasar shift cipher but a lot less complex or unbreakable than a one time pad system. As this is quite a difficult crypto comp this time I feel it’s only fair that I give readers a couple of clues. Firstly the crypto system is a triple source manual book code system and secondly the plain text is a section from some well known literature in English

You can find the rules for this competition below the ciphertext.

Good luck and remember the closing date for this one is the 25th January 2017.

1285234    253513    34422    1364144
253411   2372222    385128    3118115    137815

125529   1375216    368122    37126    249925

2314226   398221

313211 356127 255815 36415 1282113

1375216     329127     3851258     232523

238712    2401215

136412     1362237      310616     36527
331213     2561216     2435113

249925    2314226    382223     1254253
330115    36421    244611    250922    2554214

253513    2354217      249925    1287128     1293143

325231 1287128 2436116 241113 2373117
384213    32813     125124

3105216     3118215     3118122     2298213
1363110    255916    1320134     365114

325231    240510     311818    2432214    1257239
3133112    326121    1354234

1362237   2388212    2561216    2551212    2551112

3102211   235129    1297147   126625

Here’s the Rules

Closing date for the competition will be January 25th 2017

All entries (in plain text) have to be sent in via email to

The Editor’s decision is final.

To class as a winner and go through to the draw all entries must be at least 90% (based on the number of words in the original piece) correct after decryption

The draw will be made by a person not connected with the running or organisation of the Fahrenheit211 blog

The draw will be witnessed

Employees and relatives of employees of the Government Communications Headquarters in Cheltenham are barred from entry on the grounds that their computers and decryption knowledge would give them an unfair advantage over the normal person,

Nobody associated with the running of the Fahrenheit211 blog is allowed to enter

The draw will be made one week after the closing date of the competition

The draw will be made as follows: All winning entries will be numbered and the numbers will then be placed in a box to be drawn by someone not connected with the Fahrenheit211 blog.

The prize is as advertised and no alternative prize can be offered or given

There will be one prize and one prize only.

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