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
61 views

Find the hidden message in... this grid

(So I made this puzzle, and I wanted it to be fun rather than difficult! I hope it’s original enough) Given a 5x5 grid as input, here’s an algorithm: randomly select any 3x3 grid within the 5x5 grid ...
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My favorite holiday destination

My favorite holiday destination is hidden in this secret message. Can you find what it is? Hint 1: Hint 2:
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478 views

What is the battle?

You wake up in a strange room. No one is there, as far as you can tell. But there are three doors, a piece of paper and a numpad, which is a standard keyboard. (this is N. O. T. a 'what door should ...
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The Popup Annoyance

The story Fred, a software designer, woke up, got dressed, took a shower, ate breakfast, then headed off for work. He sat down on his chair and booted up his computer, only to see that all the files ...
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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....
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Mapping days as a 4 digit number! [closed]

I have a puzzle that includes mapping days as a 4 digit number. Sunday: 6137 Monday: 6240 Tuesday: 7358 Wednesday: 9497 Thursday: 85?? The first digit is just the number of characters and the second ...
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A maze, a statue, and a riddle

Hints at bottom John and Jeffrey had been friends for a long time. After meeting at Fort Bragg and serving in the military in the 60's, they had always remained close, even living in the same town ...
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CSE Hex Cube Puzzle

I've been tackling this puzzle named "Hex Cube" from the CSE (Communications Security Establishment, the Canadian "equivalent" of the NSA) which comes with the instructions: "...
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Communication via a Rubik's cube

So, I watched The Promised Neverland recently and after exploring a little, I found out that Norman used a 5x5x5 Rubik's cube (aka a professor's cube) to communicate when he was held at the $\Lambda\...
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Please, I don't know greek!

data key result 7, 2, 17, 82, 56 0 ΛΞλν 1, 3, 8, 127, 65, 8 19 εΤψΒΖ 5, 64, 13, 9, 4, 42 7 δδιΡΠ 13, 9, 8, 657, 31, 3, 7, 5 3 ? Hints
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A very basic cipher

The following is a relatively basic cipher I have constructed. I still hope it's entertaining. _ _ _ _ _ _ _ A _ A A A A A _ A A A D B B _ A A B H The answer is ...
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Increment and shift the points, to the cipher!

I just thought of a cipher, here's how it goes: Input strkey intkey Output Hello World! abc 9 ƉƦƭƭưšƘưƳƭƥŢ Crack this cipher i'm happy 13 ŧʦƖ˕ƅ˄ƇˆƏˎńʃƘ˗ƌˋƍˌƗ˖ńʃƇˆƍˌƔ˓ƌˋƉˈƖ˕ POW! !@@#$^&*() 2 ...
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Just your average cipher

I decided to attempt making a cipher, and here is what I came up with: ...
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502 views

Confectionery Crime Conundrum

Yesterday I received one of the strangest cases of my career as an I.S. PI (Insightful Sleuths Private Investigator). I was reclining in my chair, working on the latest crossword puzzle when I ...
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Can you solve this sortpher?

(Sort-cipher, heh heh.) This is a follow-up to "Bees sting." = [1, 2, 3, 7, 8, 9, 5, 6, 4] If, indeed, "Bees sting." = [1, 2, 3, 7, 8, 9, 5, 6, 4], then can you reverse-engineer ...
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Six Series, Six Words

Update: I've just realized the image had a major flaw in it. I've added a new image and made sure it's correct. Nothing else has changed, only the image. Sorry for the inconvenience. I have six ...
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A special kind of thank you

I typed up a thank you message this morning, but I accidentally ran a cipher on it and can't remember how to unscramble it. vh 5cq pajmn lujbbaxxv fjclqrwp cnaaxa dwoxum xw cqn cnunerbrxw. R anvnvkna ...
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Decipher this message for instructions to decipher this message

NINTH UNDUE COMICAL BURGER CUTLETS SLITS TURTLE REGRESS SORTS PROPHET SQUATS PUPPY ANGINA DUDS SKUNK TIGHT ODD TERSE COLONEL DIVED SOON AREA DIARIST SKUNK DREAD HASH RENTER DOWDY MAMAS GURGLE PORPOISE ...
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Encrypted string to decipher

Here’s an encrypted string which I submit to you for deciphering. I do know the answer. m"eqpI!#ttfytp"wJ"/vvq!vj"egbpd‛fo!gucwksrs"pmnufo!ujju"!wsq!"tuswhkg"...
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The Unsolvable Mystery

Imagine one day, out of nowhere, someone emails you a cipher. You can't solve it, so you post it online. You ask people what it means. But all they tell you is, "Your friend must be up to ...
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What does this "ordinal cipher" say?

I invented (I think) a kind of cipher! What does this message say?: first fifthhsecondngfourth firstsecondthirdfourthfifth, fourthecoseventhd fifthsixthsecondseventheighthfourth ...
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Ernie and the Social Network

Ernie finally made it home over the weekend, so I dropped in to give him a bit of help tidying the house (the house sitters hadn't been the most dependable people). We were just finishing the ...
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In this decrypted cipher, what is meant by "GABL" and how should I make sense of the whole message?

In "The Blue Scarab" in Dr. Thorndyke's Case-Book by R. Austin Freeman, Thorndyke finds the dead body of Uncle Reuben in a meadow based on hieroglyphic letters inscribed on a blue scarab ...
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What are these two athletes talking about?

Fernando Alonso and Esteban Ocon are currently the two drivers driving for Alpine Racing Team in the 2021 Formula 1 season. Earlier today, Fernando and Esteban had this conversation in clearly coded ...
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190 views

Message in another form

The goal is simple, figure out the message hidden in the numbers! ...
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mmm mmmmmmmmm mmmmmmmmmmmmmmmm mmmmmmmm mmmmm mmmmmmmmmmmmmmmmmm mmmmmmmmmmmmmmmmm mmmmmmmmmmmmmmmmmmmmm mmmmmmmmm mmmmmmmmmmmmmmmmmmmmmmmmmm

mmmmmmmmmmmmmmmmmmm mmmmmmmmmmmmmmm mmmmmmmmmmmm mmmmmmmmmmmmmmmmmmmmmm mmmmm mmmmmmmmmmmmmmmmmmmm mmmmmmmm mmmmmmmmm mmmmmmmmmmmmmmmmmmm mmm mmmmmmmmmmmmmmmmmm mmmmmmmmmmmmmmmmmmmmmmmmm ...
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Signatures of serial killer Edward Wayne Edwards?

This is from a real-life murder-mystery. In 2009 Edward Wayne Edwards was arrested and convicted of five murders, following a tip-off from his daughter April. Former detective John A. Cameron ...
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Boxentriq level 20 with dancing figures and a book cipher

The picture below is a puzzle from the Boxentriq game, which should help me find a particular book. Decoding the pictured Dancing Men cipher gives me "LIBERAL II". Using this and the numbers ...
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Everything needed to solve this cipher is on Puzzling Stack Exchange [closed]

5444 ---> lcxxfy 1906 ---> pstbqjilj 1582 ---> tcxvbpixrpejooat 1431 ---> dohhsfb 888 ---> uvqta 605 ---> noacomputers 618 ---> ylibz 425 ---> ...
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Can you pick up an extra shift?

I was going through some old documents the other day and found some instructions for a one way cipher: Given a word w, iterate over its characters. For each character c, determine if its zero based ...
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Oh, the burning blade! Stabbing him in the heart!

It's early afternoon, and you're just arriving at the Puzzling Examination. As you walk in, the Duke personally greets you. "It's you!", he exclaims. "I was hoping of giving it in ...
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A splash of Minecraft?

I was playing Minecraft the other day and came across a beautiful splash message. Subsequently, I was inspired to create a puzzle for it. Svir, look out below! Shorty's slang stays surprisingly stout....
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The things we do for love

A lawyer said to a peasant girl: "If you want to be my Girlfriend send me a note with your name and your favorite color so I can send you your favorite colored dress." The peasant girl replied with a ...
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Find the hidden message in the following equation

Find the hidden message in the following equation. The answer is not in verbal format. $$| -3xmy + xy_5 |^3 = 375g^3x^3$$
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Challenge on ASCII Codes

My friend shared a challenge puzzle with me but I don't have any idea how to solve it. I believe that it's related to ASCII characters.
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A journey through letters and numbers

In the year 2407476658354979366708415043923125501315337890943021769230219230892355006879909214795402102204224, as cosmopolitanism is in the air and companies are more than ever bound to ...
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Odds of there being two solutions to a word puzzle [closed]

What are the odds of there being two solutions to, say, a cryptoquote? And is anyone aware of an example of such?
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A Mathematical Cipher [cIosed]

Closed. This question is off-topic. It is not currently accepting answers. 💡 Want to improve this question? Update the question so it's on-topic for Puzzling Stack Exchange. Closed 1 second ago. ...
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Open one curtain and you see another curtain

There are two sets of ciphers in this puzzle. Open one curtain and you see another curtain.
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Help deciphering string of letters without spaces

Here is the string I was given: WWDETHHNECDPHNEHOSHTEPSAOREGOTNEOGWOYTEVWLAAEROREANNOMEEWT GTELTEETOVWDIUEHPIBWER All I know about this puzzle (after asking the people who created it) is that there'...
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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 ...
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1answer
179 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 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 ...
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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 ...
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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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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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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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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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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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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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