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Questions tagged [cipher]

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A cipher is a simple method of modifying messages to make them unreadable except to readers who know the key. Common ciphers are Caesar, Vigenere, Atbash, and several types of substitution cipher. Other ciphers include polygraphic ciphers such as Playfair and Foursquare and numerical ciphers such as Polybius and Nihilist. Cipher puzzles sometimes make use of data encodings like Morse, Binary, or Base64.

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A very hard puzzle consisting of a grid and a riddle.
testcloud Shell's user avatar
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1 vote
1 answer
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Uh-oh! I encoded another message, but I don't know what it says... Here's the message: 65, 64, 336, 585, 854, 1342, 1404, 1717, 608, 2231, 928, 3100, 3589, 4961, 1376, 5029, 5353, 5959, 6832, 7705, ...
Laszlo Pav's user avatar
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This was posted on a board at my educational institution (I'd rather not say its name) by another peer and received much attention. It was stated that any resources could be used and yet no one has ...
Nihhinygb's user avatar
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12 votes
2 answers
670 views

I have encoded a message, but I forgot how I encoded it! I drew a diagram, but I'm not sure I understand it... Here's the message: 170, 358, 247, 137, 289, 175, 333, 233, 116, 263, 166, 305, 200, 344, ...
Laszlo Pav's user avatar
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5 votes
1 answer
272 views

In this puzzle it is your job to identify what is hidden behind all of this 81 52981144144 168125. 81 5291361 361225 64814964. 4006425 529148425361 12125256400 64814004008119649 16925 119616 81 ...
Kathi's user avatar
  • 97
-12 votes
2 answers
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This is a substitution cipher from eva voynich that are equivalent to the voynich glyphs then substituted to Latin letters. Is this considered a Caesar cipher or a monosyllabic substitution cipher? ...
Tom E. O'Neil's user avatar
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3 votes
0 answers
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Here is what I know for sure to be true with this cipher: “Player Name” becomes “Zgacig Xuva” “Character Name” becomes “Kbatonfop Ruyo” “Campaign Name” becomes “Kuproepc Wehe” “Appearance” becomes “...
Rosalie T's user avatar
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35 votes
1 answer
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There exists a code by which the words MARS, MOP, RAJ and HALEST (among others) can be mapped to specific flags (see the image below). Using this same code, to the flag of which UN member state can ...
Stiv's user avatar
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Challenge: One secret word encoded in three different levels. Context: I created this challenge myself. I have encoded a single word using three different methods (three levels of encoding). All three ...
Rn Nandi's user avatar
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13 votes
1 answer
569 views

Joy was first. Then a vivid wave of nostalgia. The message yanked my mind right back to those old days in the Unix lab. I saw him, headphones on, fingers locked on the home row as he jumped around the ...
n1000's user avatar
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6 votes
1 answer
331 views

Viezv'j pflex jvtfeu tfljze Reavr yru svve mzjzkzex, reu jkrpvu rk Viezv'j gcrtv wfi kyv nvvbveu. Fur frrzrq irel avpr, ohg Reavr pbzzragrq gung fur ybirq cenpgvpny wbxrf. Bpib jmkium ixxizmvb epmv ...
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1 vote
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? #{ #{==]... These are the symbols, I don't know what they are but I've tried everything
Joy Cabral's user avatar
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19 votes
1 answer
351 views

A motley troupe of four unlikely band members have disguised themselves by encoding their identities. Who are they? № 𓏤 gggg gggg gggg gggg gggg gggg gggg gggg gggg gggg ggg № 𓏤𓏤 ...
Elements In Space's user avatar
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3 votes
0 answers
193 views

Here is Paris subway's map (clickable to zoom) APD BPL CRS DGE EPI FPI GO HCAF IMAA W??K KSB LMB MSL Happy Chinese New Year! Hint 23rd of February 26
JKHA's user avatar
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6 votes
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(This is my first attempt at creating a puzzle for Puzzling SE, so please tell me if i'm doing this wrong) It is encrypted using a chain of 3 classical (pen & paper) ciphers Ciphertext: ...
IA7's user avatar
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