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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14
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0answers
226 views

Lost in Translation

You arrive on a foreign island, but upon heading to the local library, you find yourself unable to decipher the texts. You wonder what's caused this... ...
3
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293 views

Zed's Phone: Failure to Communicate

My friend Beto and I constantly buy things for one another. One day, he gave me a strange-looking phone and said it was my birthday gift (My birthday wouldn't be until 3 more months). He said he ...
7
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1answer
431 views

Complete this puzzle(the right way)

A circle and squares.. Try to complete this picture(the white areas) and explain why! Hint1a Hint1b
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1answer
1k views

The Third Room of Numbers Dungeon

After being enslaved by the evil Lord Numbers, you have been forced to navigate his treacherous puzzle rooms. After easily defeating the first and second puzzle rooms, you stumble into the third room, ...
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1answer
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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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Solving an enigma

OQBA BQWG OZBF XSFX AIUF MIQE FGBE JEAJ UNLE QXTR ZEXL YFKJ LBQV XDRG N My friend gave me this and said it was an actual message so I'm determined to find out but I'm not sure how to crack it. Anyone?...
27
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1answer
468 views

Is there a code in this painting?

This was posted in a Facebook group yesterday. It’s also made the rounds on Reddit but all of the commentary seems like scattershot speculation so far. From the post: This is a painting done my ...
6
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1answer
467 views

Zed's Note: Famously Infamous

My friend Al and I constantly bicker. One time, he proudly boasted that he can crack any cipher ever written, so I put out a little wager: if I can stump him with any cipher I write, he would have to ...
8
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1answer
350 views

Riddle Number Four

Time for a more challenging encryption, seeing how riddle #3 was decrypted so easily. First, I must note that this encryption was inspired during a chess match I partook in. I call it the ENIGMA ...
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1answer
3k views

Decode the message enciphered in these symbols: ↗↑↙↓↘←↑↙↘↘↗↓↗←↙↓↖

↗↑↙↓↘←↑↙↘↘↗↓↗←↙↓↖ The first character of the plaintext is 'P'. The final character of the plaintext is 'E'. Hint 1; Hint 2: Details (not part of the puzzle): "↗↑↙↓↘←↑↙↘↘↗↓↗←↙↓↖" is the cyphertext....
4
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1answer
146 views

Square Image - Sifr wa Wahed - Gol va Keleed

Title is irrelevant, but here's a simple puzzle I made...
4
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1answer
160 views

SoIve this cipher, please [closed]

Solve this cipher, please. 24/12 is coming so 25 24 18 25 27 18 25 26 18 27 29 18 26 23 18 26 45 18 26 42 18 26 27 18 25 21 18 23 22 18 26 28 18 27 29 18 26 21 18 25 28 18 24 45 18 23 20 18 26 22 ...
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What could it be?

What could it be? Hmm... Try complete the picture! Hint1a: Hint1b: Hint1c(strong): Hint1d(stronger):
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Picture puzzle… Replace the “?”

Below is a picture and your task is to replace the question mark!
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1answer
161 views

Hiker's Cabin Mystery | Pt. XVII

Sorry for the long break everyone! It's been hectic. Here goes XVII: There is another chamber of the labyrinth which contains yet another inscription on the wall: Once again, there is a keyboard and ...
3
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1answer
285 views

Circle Puzzle… Replace the question marks

Try replace the question marks in this picture! Hint:
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1answer
234 views

What letter am I?

I am representing a specific letter... what letter am I?
2
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1answer
96 views

Another picture problem

Another picture puzzle. Replace the question mark. Once again, the information needed is there. So, try replace it!
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415 views

Password Strength

An entry to Fortnightly Topic Challenge #35: Restricted Title 1 - based on this xkcd. I am the password manager, helping others remember passwords. I am the password manager, receiving many calls ...
11
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1answer
433 views

Enter the Password

You sit in front of a computer terminal. To save a puppy from beeing eaten by a unicorn (I'll make up a better background next time) you need to enter the correct password of 4 letters. You are given ...
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5answers
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Crack the Terrorist's Password!

You work for a secret organization, and recently the personal data of a terrorist leader has fallen into your hands. This would be great news, except for the fact that all the files are locked with a ...
2
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1answer
169 views

Visual calculation puzzle

Below are some objects and numbers. Try figure out what they represent and finally replace the question mark.
5
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1answer
177 views

Picture-Problem

Here is a picture problem, and the task is to replace the question marks. All the information needed should be there. So... try figure it out!
2
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1answer
228 views

COLOR-PUZZLE.2. Complete the picture

I have made another color puzzle. Try complete the picture. Edit made! Hint1: Hint2: Hint3(last one):
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1answer
121 views

Quit scrambling my keyboard!

It happened to me again! More scrambled, this time. ncb , r2u 3b,99 bn/c b72b ic326c
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1answer
117 views

Keys have been shuffled, boards turned

Some person decided to mix up my keys, and I forgot where my letters are. Fqji.br.hqrcu;wa-.'ubquvq.'zw;cjqa.ye
10
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1answer
287 views

Hopscotch Cryptograph

With a little squinting, you should be able to discern a message which runs from the top to the bottom of the text box below. (I have indicated the column with a little arrow.) That is the visible ...
4
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1answer
338 views

DOTS… What am I looking for?

Dots, dots, and more dots. Try to figure out what they represent.
6
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1answer
279 views

Density-type puzzle: Having A Good Day?

Here's another Density puzzle. I've got to say, I really like making these. Part of this is pretty simple, and part of it is much more complicated. Let's see what happens! Here it is: Solution: (3,1,...
9
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1answer
335 views

Complete the picture

Below we have a set of strange squares. Try complete it!
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3answers
473 views

Winter is coming

Holidays aren't far, I hope. Source: myself
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0answers
625 views

An enrypted clue for the police

A well known German drug dealer contacted his accomplice through an encrypted note. The police caught the accomplice during a drug deal and found the note in his backpack. Note: (For those who can't ...
11
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1answer
331 views

Density-type puzzle: Is This Too Difficult?

After seeing some of the puzzles that other people have made, I decided to try making one of my own. I especially like the idea of Density puzzles, invented by @Dmihawk. This is the first puzzle I've ...
8
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1answer
232 views

Mapmaker mauled by mace meets meretricious monk

After abandoning my job as a researcher due to a pirate attack, I've taken up a job as a galactic cartographer. To support my craft, I've made it my business to explore whichever galaxies I can. ...
27
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1answer
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The first Density™ Puzzle!

Welcome to the very first puzzle in a new series! It's all about (hopefully) exploring new ways of creating puzzles, as densely as possible. If you'd like to create your own Density™ puzzle, the ...
7
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2answers
610 views

Missing word! What word am I looking for?

What word am I looking for? Try decipher the following: ((CZ18172612)⁺¹)=_____? Edit; Gary S was very close, but here's a hint...
2
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0answers
498 views

Decode this message to stop the destruction of Science!

An extremist religious organization called "The Redeemed Against Scientific Usurpation of God's Authority", or RASUGA, have converted the world's leading time travel researcher to their beliefs. Using ...
7
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1answer
210 views

Excited Raichu vs the Dream (Chess Puzzle)

(Source: An actual tournament game I played all the way back in 2016) I had the weirdest dream last night… It started out normal enough, which for me, is basically nothing… but then I woke up, ...
7
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1answer
196 views

Images and mysterious numbers. Replace the question mark

Below we have some images and numbers. Try replace the question mark. (▭, ∆):(1147125)::(🙌, 🛸):(198916)::(🌆, 👑):(152314)::(🔥, 🥩):( ? ) Hint:
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1answer
160 views

Letters and numbers… Replace the question mark

Here's some letters and numbers. Find "?" (S,V):3::(U,K):16::(T,F):5::(L,K):5::(M,W):1::(I,O,M):? Hint1: Hint2: Ok, this is a minor give away,...
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0answers
175 views

Zed's E-mail: My Good Ol' Uncle Sugar

My friend Gabby and I constantly look out for each other. Just the other day, she received a strange message from what I thought was an uncle of hers. "Problem is," she started with a worried look, "I ...
4
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1answer
168 views

A Coldport Christmas puzzle

Detective Inspector Playfair, an energetically boisterous policeman who often complained about Endeavour Morse having his own TV show, was sat on a bench at the side of Coldport's newly laid town ...
0
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1answer
67 views

Encrypted text related to murdered Scottish king or queen [closed]

The following image should lead to a 4-digit numeric code. The hints given were as follows: and I've made some progress, but I have no idea if it's in the right direction, so I don't know if I ...
8
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241 views

Cryptic Puzzle for Puzzlers: PART II

You are a cryptanalyst who works for the US Army. You have been intercepting what is believed to be enemy spies' communiques. However, the documents are very normal looking: Good Morning, The lasagna ...
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2answers
183 views

If these equals… then what number is “?”

If, 7∆ + 11□ - 2□ + 1∆ = 36 12∆ - 8∆ + 8□ + 2∆ = 25 3□ + 17∆ + 5□ + 2∆= 289 then, 1□ + 7□ + 2□ + 3∆ + 17∆ = ?
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Input on a cipher? [closed]

So, I randomly stumbled across this cipher/code and I am pretty stuck and wondering if anyone had any input: 65706377 736D 797367 676B72687A67 74636D64 7161 B8B 78863B1F56468 767A796B 71 6C6E79657A ...
2
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1answer
117 views

Number missing! Replace the question mark

A number is missing. Find "?". ((13 19 4□)⁽⁷ ⁴ ⁻¹⁾□) + ((14 6 4□ 3□ 5)⁽⁶ ² ² ⁻⁴ ⁾□) + (4□ 13 12 5 23 5)⁽⁴ ¹⁰ ⁻⁷ ⁷ ⁻¹ ⁾ = ?□
9
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0answers
329 views

Recurring Meeting

The computer scientist's assistant is late at work once again, trying to once again decode their bosses directions for the day. Under meetings, the boss has listed only a single meeting: ...
7
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3answers
891 views

Super Secret Cookbook

You requested the password for a super secret cookbook and received an SMS with the following content: 77733666688833 2555555 777772222337777 2663 777337555222233 84433 6688622337777777 9444844 ...
7
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1answer
384 views

Number puzzle. Can you replace the question mark?

Replace the question mark. If, [5 22 5 14 19] 12 16 19 21 [[15 20 23]] = 65 then, [[8 5 18 20 5]] 9 13 19 14 21 [14 14 5 9] = ?