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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1answer
151 views

A Cryptic Book Cliche

There is a strange bookcase at the end of a chapel's corridor that is pitch black, save for a few lanterns lighting the way. As you approach the bookcase, you notice six conspicuous books with unique ...
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A Z340 question from a competition anybody know how to solve it? [closed]

ACFSOAGGSDEOFEEDC BRSAOBNLHHHOESOVP EWWEALRADAATOWLER TFLIITNECBENSWRNE TTRICTTBANHBRTYAT NEOTONOHHOLGAAWUZ RUTNTETAUGOMYIRGH EAIMTIHROLPASBTNL EEWTNIOTRTRLLNEEI is the output from https://www.dcode....
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No Time to Die, Period

Inside MI6's server farm in the middle of the night, the operator's eyes skittered frantically over an intercepted message: The development of our new APG code has been coming along nicely; I've ...
10
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1answer
297 views

A rather odd tree

I was exploring an ancient garden. It seems the original inhabitants had long since left. One of the trees particularly struck me. Besides the delicious-looking red fruit the branches were twisted ...
2
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1answer
209 views

An airport authority's important message

A middle-aged man sat in a sofa in an air-conditioned room of an airport, staring at the officer facing him; the latter had her left hand on a small laptop. "I have a very important message for ...
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3answers
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The Jade Rabbit's present

The Jade Rabbit hopped up to Chang'e with a plain white box. "I've got a present for you!" "Another elixir of life?" the immortal moon goddess sighed. "I've lived through so ...
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The maze one should not enter

Once upon a time, somewhere in Italy, two archaeologists unearthed a buried passage. As they explore the passage they reach the doorway which is clearly the entrance of a wide structure behind. They ...
2
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112 views

Encrypted code with colours and letters. Can you identify the code, I have the possible key [closed]

I have a code that I can not break. It has been looked at for such a long time and I have tried to solve what might be the content or message. I recently was made aware that the alleged key for the ...
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183 views

any tools/sites/algorithms to decipher garbled text based on improper hand position on a keyboard?

Not sure if this is the proper place to ask, but I sometimes come across garbled text (see example below). My suspicion is that the garbled text is due to a person temporarily placing their hands in ...
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Which emoji is 🍔 burger's match?

Known matches: Key Matched 🤣 🤝 🙃 🙂 ❤️ ❣️ 🐸 🐷 🐍 🐌 🤔 🤎 🚀 🙏 🍓 🍒 👆 👅 🐟 🐞 😥 😤 What is my match, if I am 🍔? Hint, since I don't believe in torture
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The answer to this code is a famous celebrity

simple and fun--this is another code I made for friends Hints (how few can you use?): ...
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135 views

A series of strange codes

I made this code series for my computer science friends—they had fun solving it, and one of them told me I should put it up on this site, so here goes. The end of the code is rather unexpected! Each ...
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Room Puzzle, containing chess and ciphers. Can someone help? [duplicate]

I Have to force checkmate black king in two moves only its white turn. And the keypad Someone also asked this question here like a month ago, but the answer was wrong i tried alot of things but ...
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A new kind of cipher

While not a wholly original idea (I stole it from somewhere–just can't remember where), it should be resistant to classic cryptanalytical techniques. However, I have my doubts about its actual, real-...
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328 views

How was this cipher created, and how can I solve similar ones?

My friend sent me this cipher: etsitsiduamuqmuessenon,tsesumissep"omaet"orpdouqmuiterpteangamecovtivamalcxete She also said it roughly decodes to: And I screamed for whatever its worth, '...
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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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Message passed between friends in a library

Mary met her friend Jenny in the library. They gossiped about various things and then each chose a book and went to separate corners of the library and sat down to read. After half an hour Jenny went ...
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3 mysterious emails

I got this from a neighbor, but I don't know why. The emails are separated into 2-3 parts. Here are the emails: Title: RO KED BYA LAOUT Y Body: JRU. ESMY YP JSMH PIY PM YJR NRSVJ? YJSY EPI;F GIM. PJ, ...
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244 views

Cracking prices

I recently went to a furniture store where people spend my annual salary on a garish commodes and ostentatious vitrines. I note a curious code at the bottom of each item’s description label. Some ...
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What is the next diagram, and what is the number?

I needed some help to a friend of mine, he was solving a puzzle. He sent me a remake of what he was solving, and its up to you to help my friend! Note: My friend says that he messed up at 32, there ...
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Cipher with uncommon letter distribution

I have a cipher that I'm trying to decode. It's quite lengthy, so I started trying do do a simple substitution. I checked the frequency and noticed that every letter in the alphabet was used - and ...
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Code found written in chalk: “JSMYCTLYCTJCBEXD19”

The code I found on the sidewalk in chalk at my local courthouse is JSMYCTLYCTJCBEXD19 I have had trouble identifying the code type as well as the deciphered message. Any and all suggestions/help ...
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1answer
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What prank is my friend implying?

On April Fools, my friend has given me a sentence and said it's a prank, but I didn't understand it. I asked "What is this?", he mentioned "A joke.", so I was confused what he ...
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132 views

A hacker emailed someone then

A hacker sent a message in to someone that says... DARKGREEN WHITE WHITE TURQUOISE He sent another one which is... Think you can keep up with me? Enemies inbound! "Stretch out your neck!"...
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What set is the odd-one out?

RCTPS MNCFON RCTPS KVWP BIBI HWQB IHQB IHQB ABAABBBB ABAAAABB ABAABBAB AABAAAAA ABAABABB ABAAABAB ABABAAAA ABABABBB AABAAAAA ABAABBAA ABAAABAA ABAAABBB ABAAABAA ABABAABB AABAAAAA ABAAABAB ABABAAAA ...
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Ifz, ipx bsf zpv epjoh Wbooz? What does this code from my mother's highschool stuff say?

I found this code in my mother's box of highschool stuff when we were cleaning the basement and found this just wondering what it says Ifz, ipx bsf zpv epjoh Wbooz? J bn epjoh xfmm, zpv? J bn epjoh ...
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Were the Decipher II and Decipher III puzzles solved, and if so when and by whom?

The Decipher jigsaw was a relatively famous puzzle released in the early 80s, promising a $100,000 dollar prize to those that could solve it. After two years with no winners, the creator, Warren ...
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The Last Challenge

This question is a continuation of this one, and you might want to read it if you haven't already. 'Another code-name,' I think. 'There's no way that's his real name'. Nonetheless, I type in '...
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275 views

MASK or no MASK

Everything you need is above..
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Try to decode this ciphertext! It's probably enciphered multiple times

As the title says: Your mission is to decode this ciphertext. Hint: It's probably enciphered multiple times. Yrj cxc myxn yfqqbs, myxn nxmb obfuuh xn dohqmxd..
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Code with algebraic symbols

So my friend asked me to look for what kind of code or cipher (or anything) this is, and I have been researching for a while now without any luck. The code: ++ ×× -- / ×= ×÷ -- -÷ / -= ×÷
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The Thief's ®341 Name

This question is continuation of this one. You might want to read that if you haven't already. 'That's it' I thought. 'B3TA_Z3R0' should be the thief's code-name. Typing that in the 4th monitor's ...
11
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1answer
457 views

The Puzzling Free-to-Play Escape Room, naturally!

An entry in Fortnightly Topic Challenge #50: Escape Rooms Without revealing too much, knowledge of geek culture and/or superb Google skills are required for this puzzle. Coming from an anime ...
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What is the thief's name?

This is a continuation of this question, and you might want to read it if you haven't already. I rub my eyes. A slight gap between my eyelids tells me that the Deputy-Inspector has been shaking me. ...
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655 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 ...
56
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1answer
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28 Minutes Later

An entry in Fortnightly Topic Challenge #50: Escape Rooms I open my eyes to find myself lying in a bed in a white room. Sitting up is difficult, as a tangle of wires and tubes are attached to my arms ...
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An Evil Cartesian Psycho

I came up with this puzzle when I was in high school. There is an island owned by an evil man who keeps some tourists who were visiting the island a few years ago captive. The authorities demanded ...
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124 views

“Friend”-ly Puzzle

All stories in this puzzle are fictions; the puzzle was made by myself. My friend left me a puzzle. He gave me 5 papers, each had some information on it. #1 WORD SEARCH A B C D E F 1 SOR SUF HYP ...
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1answer
189 views

The Burnt Textbook

You and your team have successfully intercepted a message from the enemy, which could win you the war! But the message is encrypted with a difficult cipher, and your textbook's instructions for ...
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Why did they close my riddle?

So I came up with this -at least what I thought to be a- great riddle and posted it on this site. Within minutes, it was closed by the community. It said: This looks like a puzzle you found somewhere. ...
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Rison's Jangles

This message is from a text game and has me stumped. I do not know the correct answer. The game is from the Legends PBM System and the text is discovered within the game so it's not something I can ...
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1answer
281 views

A Code That's a Little Bit Weird

The street outside Rockefeller Center was a very busy place to hide a secret message, I thought, but sometimes the best place to hide something was in plain sight. I'm a government agent, from one of ...
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Slitherlink with a message

An entry in Fortnightly Topic Challenge #48: Unusual tag mix After pondering what my next puzzle would be about I decided to change my base towards the realm of slitherlink puzzles. I found this ...
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1answer
362 views

Earth Science | Chemistry + Flags

An entry in Fortnightly Topic Challenge #48: Unusual tag mix Which famous chemist is represented by these flags? Go big or go home!
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1answer
244 views

Cryptic Geometry

An entry in Fortnightly Topic Challenge #48: Unusual tag mix I was trying to study some geometry, but I just can't seem to wrap my head around all this mathematical mumbo jumbo. Can you help me out? ...
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424 views

In the Cover of Darkness

I awoke in a mysterious desert wasteland that I didn't recognize. I looked around and saw nothing as far as I could see, except for the oddly rhythmic storm in the distance. Reaching for my phone, I ...
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227 views

Not the Genesis of a Break

The following cryptic clues are in English, don't include punctuation, and have a theme (except for one minor exception) which will provide context for the definitions of the clue. There are two main ...
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539 views

The Vanished Violinist

The inspector sighed as she lifted her head from the mess of notes, scribbles and diagrams on the desk. The air in the office was so thick she could barely make up the "no smoking" sign ...
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1answer
82 views

A Short Readable Note

Back in high school when I was in a math class, I came up with a brief note that I didn't end up sending. Can you tell what it says? !r!k6ⲗonrncⲗ There is no ...
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A strange Letter

1: Hey, could you please give me your car tomorrow? I have to go to the movie. 2: No, I don't think so. 1: Hey c'mon. You're my brother. You must help me. You ain't using it anyway. 2: Of course, I am ...

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