Category Archives: Ciphers

This is another particularly satisfying one to solve. XGJDGSZUIDSSDDDOURPMHDNOUZJMTBMVNAFQTVBISIBSUIDS HOHNGHOUDHFQTHOUGFOTNAFSEJDMEFFODSZUFCCZHUEPSLBM JOSFHQBKEPLBHOUGBUHTDVDKJEDBMCVSONUONSNDVBMJCFZO Good luck. As usual, the password is in lower-case and contains no punctuation. Also, it is precisely twelve letters in length.

Sorry about the slight delay in posting this cipher. There’s plenty of background contextual information, all of which will be revealed once you’ve solved it: TYFXTGXQYGTUYIIUHIFQDIXTDBQVITGEO QVTYRLOEITLYQOINBULWJLYLQOBXQPUIT GDEPDITIEITLYGTBXUVWTVDISUDGVTPUS

This cipher happened to have a nice property, which is a complete coincidence. The original title of the cipher was supposed to be ‘vexed’, hence the filename. Hopefully you’ll have more luck with this one than its immediate predecessor, which remains … Continue reading →

This cipher is entirely contained within the following image: The password is eleven letters long, if that helps.

This time, I have decided to use a more traditional form of encryption. RSCOJDNQHDNLSCKXSQGDUAKQRRAKKTQHHXMAR LBGAJAMDKLIBHAISCSDHBGDEANLRKQEKNLNQN LSCRLBGAJVGLRGLKCSNNGAISKNMLTTLRQHNBQ ZZHALCNGAVSJHMDKKQRGLNVSQHMIDPANGLCOK TDJNSSNJLULDHNSKLIBHXKQBBHXNGABDKKVSJ MKSLCKNADMXSQDJARSIBAHHAMNSVSJPGDJMAJ Enjoy.

Alice and Bob have been playing a zero-sum game; their moves are tabulated below: Good luck.

Some exciting things have happened recently. Amongst them, it has been proved that combinatorial designs (generalised Steiner systems) exist for all tuples of parameters for which a necessary divisibility criterion is satisfied. Anyway, the cipher:

Here’s the second cipher for this year. Determine the missing symbols to obtain the password:

To mark the beginning of 2014, the third season of ciphers has now commenced. This one should be reasonably fun to solve: It’s a multi-step puzzle, but you should know once you’ve solved each step.