Questions tagged [cipher]

A cipher is a simple method of modifying messages to make them unreadable, but still possible to recover. Common ciphers are Caesar, Vigenere, Atbash, and several types of substitution cipher. Other ciphers include polynomial ciphers such as Playfair, Foursquare, etc.

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3answers
611 views

Interesting email I received?

This email recently arrived in my inbox. I don't know how it avoided the spam folder, but it must be important. However, it looks like a dictionary in a blender... you'll see what I mean when you read ...
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483 views

A not very easy puzzle with an easy answer. Something that a grim puzzler might like

1f411 pirate gibberish 00000010 1f607 . 1f441 1f44f 1f411 . Cigarette ___ lion's-bane@ ワs 22 2 65 61 73 79 160 141 162 164 "2" & right(getMethod("mixintowater"), 5) 9 (4*2) 2 8 _ (...
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1answer
491 views

What should these be called?

On this site, rot13 is often used to encrypt comments so spoilers can be spoken about. Rot13 is a cipher, in which each letter is shifted 13 letters forward (or backward) in the alphabet. There are ...
16
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1answer
416 views

The calamitous Captain Clumsy

I'm a communications engineer with the Royal Navy - it's a great job, and usually I love it. But there is this one guy who absolutely grinds my gears. I call him 'Captain Clumsy' (not to his face, ...
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1answer
568 views

The escape of Beastly Gerbil

The finale of a three part series: Part 1 - The disappearance of Beastly Gerbil Part 2 - The entrapment of Beastly Gerbil I have a lot to think about... firstly I disappeared for two years, and now ...
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5answers
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Room 2 of the Maze

Still excited about your quick triumph over Room 1, you head straight for the suspended note and read it: Congratulations on making it through the warm-up to Room 2. From here on out, getting the ...
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1answer
623 views

Monoalphabetic Equation

A set of letters has been replaced by $a$, $b$, $c$, and $d$. Following are some of the words that consist of those letters, and their meaning: $abc = a\ title\ (n.)$ $abcd = a\ title\ > abc\ (n.),...
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1answer
538 views

Puzzle Dungeon: The Intro

Inspired by this puzzle that I found by looking randomly at the top-voted puzzles up to page 7. Don't question it. In the magical land of Puzzlandia (I am very creative at making up names), there is ...
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1answer
2k views

Encoding Morse Code

The letters of a message are converted to Morse code, with a space between each pair of letters and two spaces between each pair of words. Each pair of elements (for example dot-space, dash-dash, and ...
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2answers
916 views

Half an awful haiku

Attempt to find the last word: Cheryl nowhere errs She ebbs one or nag envy Aha flap green gel Purely abjurer reef Fur roof bar be ant rail Nun sync terra ???
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2answers
669 views

Alex, Dave or Jeff

A man has plotted to blow up a building. The police have three suspects. They have received a letter telling the name of the suspect. But it is coded, to avoid one of the other members of the suspect'...
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5answers
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The bakery - Clue Twenty One

<<---First clue <---Previous clue (No, I haven't just gone and jeopardized Mithrandir's entire series, I have been given permission by him to do clue 21.) A note from @Mithrandir: I have ...
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2answers
512 views

Can you name the country code?

As an hommage to @eyl327's "can you name the country code?" puzzles. Here is one more: Given the country codes of the 10 countries in the following table, can you figure out the country code of ...
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1answer
979 views

The Twenty Doors (ROOM 4)

This is part of The Twenty Doors series. The previous one is The Twenty Doors! (ROOM 3) The next one is The Twenty Doors! (ROOM 5) You now enter room 4. This one has a load of A's and B's carved ...
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1answer
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Hidden message #1

One day I was visiting an unknown forest and I found some mysterious message written on the trees. The message was WEZI SUZNKX JFWYM QT BRX AMPP GLH Help me to decode the hidden message.
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Justice and Fairness: Part 2

A friend of yours was part of a secret society and was put on trial on 15 December 2014 without a lawyer. Alice encrypted the trial's transcript and sent it to Bob, but double agent Carol was able to ...
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2answers
616 views

Dungeon Crawler: Level 3

You are the protagonist in a game designed by NeedAName Inc. Proceed through the levels using your video game knowledge to solve the puzzles therein. Solve all levels and beat the game! Level 3: ...
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1answer
387 views

The case of the strange coffee

When you figure out that the guy speaking Gibberish meant you go back to the restaurant the following day, and hope for the best. When you walk in you notice the man who said the Gibberish in the ...
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4answers
598 views

Where did this mysterious note come from?

The boy had a cat on the boat, Alone among blue all around. He wrote a very brief note, Hoping the can would be found. I just came back from the Latpipe Hotel and decided to head to the beach, for ...
3
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1answer
485 views

A lad named E. Mandala

In a follow up from yesterday, I was sent another email from the same source. The tile of the message was, "A lad named E. Mandala" which I've set the title of this puzzle to. Can you help ...
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1answer
625 views

Portraits and quotes - Clue Twenty Four

<<---First clue <--Previous clue A note from @Mithrandir: I have given explicit permission for @Randal'Thor to post this, and gave him the answer to encode. If you want to post one, ping @...
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1answer
282 views

An Unfortunate Conundrum Involving Extremes

The tide recedes as I sit in the fenced garden on my roof. A jagged rock lies ready to wreck the mariner who errs. A seabird screeches somewhere to my rear. Longing, I look at the world beyond the ...
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1answer
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Why the 'Be Nice' policy? - Clue Eight

<---Previous clue You push the buttons under the letters on the rock wall. Nothing happens for a moment. Then there is a rumbling noise. gggrrrrrrrRRRRRRRRRRRRRRRRRRR The rumbling stops. You ...
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2answers
674 views

The Perplhexing Mystery

There has been a jailbreak in my (imaginary) town. And I, a Junior Detective of the town, have gone to investigate this. As I reach the police station, an inspector comes out to greet me. No doubt he ...
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2answers
159 views

Musical Chairs Cipher

Six children -- Alice, Ben, Carl, Denise, Eddie, and Flo -- are playing a game of musical chairs in class. On each of the five chairs is written a seven letter word. The children start out in ...
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1answer
154 views

Desert Wanderings bring…Ciphers? Part 3

Part 1 can be found herePart 2 can be found here After painstaking, letter by letter, line by line decryption you think over the riddle a little and then realize what the answer is. You once again ...
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4answers
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Room 5 of the Maze

This is Room 5 of the Maze series. For those wishing to start at the beginning, click here. To go back to the previous room, click here. As you arrive at the answer to Room 4, you realize it's the ...
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1answer
287 views

Desert Wanderings bring…Ciphers? Part 1

Part 2 can be found here Part 3 can be found here You should’ve know not to listen to that sketchy peddler. Now you’re lost in the middle of the desert with nothing to eat and hardly any water left. ...
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1answer
376 views

Can You Decipher It?

Cryptogram Puzzle #1 Message: cp pl cq gv ud fl qz nt da bq kl ql ha uv dv ht od qt hd "np bf qk wa ud lw fd lx cr dl pe bq rm fl np bf qk wa ud lw fd lx cr dl pe bq mg dV" Hint 1: Hint 2 ...
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1answer
724 views

The Twenty Doors! (ROOM 6)

This is part of The Twenty Doors series. The previous one is The Twenty Doors! (ROOM 5) The next one is The Twenty Doors (ROOM 7) You go through door 5, and see a rather unusual keypad. ...
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1answer
606 views

The Twenty Doors (ROOM 7)

This is part of The Twenty Doors series. The previous one is The Twenty Doors! (ROOM 6). The next one is The Twenty Doors (ROOM 8) You (after many days rest in Room 6) finally go into Room 7. The ...
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2answers
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Room 4 of the Maze

This is Room 4 of the Maze series. For those wishing to start from the beginning, click here You wake up in Room 4 after a troubled night of 'sleep'. Your head was clouded all night with thoughts of ...
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5answers
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The Twenty Doors! (ROOM 3)

This is part of The Twenty Doors series. The previous one is The Twenty Doors! (ROOM 2) The next one is The Twenty Doors (ROOM 4) When you finally realise that the cipher used in room 2 was the ...
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1answer
550 views

The Twenty Doors (ROOM 9)

This is part of The Twenty Doors series. The previous one is The Twenty Doors (ROOM 8) The next one is The Twenty Doors (ROOM 10) When you go into Room 9, there is a strange hint, signed by 'Dr. X': ...
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1answer
354 views

No Cheating - Cipher challenge

NO CHEATING Today’s cipher is a famous cryptographic method known for its economy, ingenuity, and difficulty in cracking. Its inventor created all sorts of cool things, including musical instruments, ...
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1answer
7k views

Texas Numeric Hidden Message [closed]

This numeric hidden message was found on a seat at Rangers Ballpark in Arlington, TX, with an instruction to "Solve the Riddle". What does it mean?
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The Twenty Doors! (ROOM 5)

This is part of The Twenty Doors series. The previous one is The Twenty Doors (ROOM 4) The next one is The Twenty Doors! (ROOM 6) You go through into room five. There is a standard keyboard, and, of ...
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1answer
954 views

Some messed up words - Clue Six

<---Previous clue The door swings open, to reveal [redacted] waiting there for you. Your jaw drops. You had no idea that this was so important, that she would get involved. [redacted] steps ...
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3answers
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The Great Binary Puzzle - Part 2

You pass the first room to enter the second room. It isn't that dim like the first room so it is easier to see. You see another combination, but this time you see something scraped on the wall that's ...
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1answer
266 views

Chess-based escape room [closed]

You go into a room, and the door closes. Some sign says: You must find a forced checkmate on the black king in two moves. The key for the Vigenere is ONLY your moves. In other words, if you played ...
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2answers
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The mystery of NOC +10

NOC +10 On March 6th, 2015, a YouTube channel named "Noc +10" was created. Since that day, this channel is uploading some really darkly mysterious videos. I will start saying something ...
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Escape the dungeon, by deciphering the codes and navigating the rooms to find a way out

You have been thrown into a dungeon with many rooms; you don't know who did this or why. You start in room 37. You might be thinking "Why 37?", so I will explain this: "Why not?" You need to find ...
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Unsolved Mysteries: D'Agapeyeff cipher

The D'Agapeyeff cipher is an as-yet unbroken cipher that appears in the first edition of "Codes and Ciphers", an elementary book on cryptography published by the cryptographer Alexander D'Agapeyeff in ...
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Geography at the pixel level

(enlarged version) The answer is a group of islands.
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A weird deleted Puzzling.SE question

So I was just browsing Puzzling as usual, when I stumbled upon a... to put it mildly, "strange" question: The question seems to be permanently deleted now... For those who disabled GIFs in their ...
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The Curse of the Ancients

The night has grown fearful. It has been a fortnight since the rising - when the dead have begun to shamble out of their graves, hunting and preying on sleeping men and women and children. The people ...
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1answer
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Word of advice: If someone beats you in a guess-the-song challenge, dominate them

Remember my friend, Jim, who, y'know, gave me that "retaliation" puzzle, which I pretended to be stumped at, just to make him happy? Well, anyone who's met me knows I don't keep people happy for long. ...
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Down the Rabbit Hole

There's a secret hidden in the text below. What mind-blowing truth does it reveal? Not imaginative? Then Zeke's Clues may assist! Unsure, lad? With our patented Obscurity Clues, begin verifiably ...
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2answers
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The mystery of NOC +10, Part 2

Background Since March 6th, 2015, a YouTube channel called Noc +10 has been uploading puzzle videos about once a week. Each video begins with the same introduction, followed by some form of clues ...
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The Puzzling Times

$$\bbox[orange]{\begin{array}{rcl}\\\hline\huge\ \ \star\ \ \star\ \ The&\huge{Puzzling}&\huge{Times\ \ \star\ \ \star\ \ }\\\hline\\\end{array}}$$   Vol. 4, No. 1 $\raise 2pt \tt{\large{\...