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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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Riddle Number Six

Fiddle diddle diddle, time for another riddle. This is another little puzzle I've concocted for you all this evening. The scenario is this: You awake in a small room with only one door. The door is ...
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Riddle Number Five

I feel as if my challenges are a bit too extreme for many, so here is a more simpler conundrum to solve. The cipher used is the same as the answer to this riddle: When is a cipher like a person who ...
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In Time or out of Time, that is the question

Brushing away the tree roots hanging from the ceiling I realised that the unicorn had stopped. “I will not go further,” he said in his deep, rich voice, “you know the prophecy. There is only one who ...
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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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Does anyone know how to decrypt this? [on hold]

Pnoat aptbw ldvpv iqujz wgyxg xtmqn yijfx tamvy bhfyq cmrll rsqhn wfnql gcbkt ygfxn yyshl ikwwj byf.
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1answer
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Eternal Bond | decrypt the message

My father was never too close to his kids, but when his fishing trawler mysteriously disappeared in a storm to the South of Guam, his wife and her three sons still felt the loss deeply. I, being the ...
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Time for the Dessert!

Here is another puzzle which StackExchange claims is perfectly identical to my previous picture-only puzzles... The answer is one word. Hint 1: Hint 2: More (and more helpful) hints coming ...
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Riddle Number Three

Time for a challenge! Here, the riddle is encoded using a specific cipher. You must decode the numbers and answer the riddle correctly to solve it. Good luck! 83191143|2367|02|41026731|434771|02|...
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Which logo does this word represent?

Puzzle 1 Which logo does the word dsPlinS represent? 1. 2. 3. 4. 5. I haven't posted in a while, but I'm back on track, baby! And to celebrate my coming back, whoever solves this would earn a $...
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Sukarno's Holocene Extinction Discovery

You are a renowned paleobiologist who travels the world and evaluates recent discoveries. You recently were contracted to fly to Jakarta University and check in with one of their researchers. You ...
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Another challenge for you guys

Ciphertext: ...
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1answer
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Little challenge for y'all

Ciphertext: ...
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1answer
177 views

This poem is complete, except the solution to it

First, hide the text, come on, no spoilers here; Second, bash at it, you have nothing to fear; Third, pair up and basic pigpen, flagging every time; Fourth, use the force, wait, no, ...
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Four boys are playing football and one of them breaks a window

Four boys at school are playing football and one breaks a window. No one owns up to doing it but someone gives the teacher an anonymous note saying: hE iS thE CuLpriT? The four boys were: ...
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A chess game with odd moves?

A friend and I like to play chess regularly. Like me, he is a lover of a good puzzle, which is what drew us to the game. The thrill of finding a checkmate in a board riddled with pieces cannot be ...
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Find the number [closed]

Ocz vinrzm dn ji ocdn kvbz Find the numbers
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Monoalphabetic Game Theory

This is a third puzzle from the Monoalphabetic Equation series, you can check out the previous one here: #1, #2. Last night, I went over to my friend's house for our monthly game night. After we ...
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In a certain code language if CONFIDENCE is coded as FGPEGEQPHK then how will PERFECTION be coded in the same language [closed]

A certain code enciphers CONFIDENCE as FGPEGEQPHK. What will it do to PERFECTION?
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How do I go about solving this cipher?

A friend and I signed up for a pay-to-play D&D campaign some time ago. Near the start of the campaign, our characters were given a puzzle to figure out. We're approaching the end of the game in a ...
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There is a secret message in the picture #2

There is a secret message in the picture, can you find it? This solution is also a clue (how to solve) to the previous one - There is a secret message in the picture. This picture was neither used ...
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2answers
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There is a secret message in the picture

There is a secret message in the picture, can you find it? This picture is from the 50 trillion dollars challenge from the free ebook "Muko and the Secret". This one is already solved so I hope I do ...
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2answers
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Mysterious email message

Today I found something quite interesting in my email. An xml file with this puzzle: -|- |-| 0_ |\/| 0 0 |\| | § |_ | -|- Can you solve it for me?
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1answer
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Monoalphabetic Geometry

This is a second puzzle from the Monoalphabetic Equation series, you can check out the previous one here. A set of letters has been replaced by $a$, $b$, $c$, and $d$ and one symbol has been replaced ...
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1answer
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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\ > ...
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Transpostion cipher help

Could I have some help with the following cipher; I have very little idea about how to start it. It's obviously a transposition cipher of some kind but I can't seem to find the key or figure out how ...
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1answer
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Looking for Cipher Help

This cipher has me vexed. FOOTOOLTLTLBDCLOLTLTJBFTOCFTOOOCDC. There appear to be too many Os(and no other vowels) to be a transposition cipher. The coindidence index is 14.75, which is quite high, ...
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What a strange program

My friend told me about this program he installed recently. It seems very strange. I don't know how it works, it's just a prompt with a welcome message which shows some messages. Here are the ...
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3answers
359 views

A puzzle about 13

Round 1: Only thing you need to do in this round is solve the cipher, you'll need 13 along the way. The solution will guide you the the next round. ...
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1answer
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Top ten best ways of transportation

This is an entry into the Fortnightly Topic Challenge #41. Last night me and my friends had a fun night at the bar. When it was time for us to leave, we couldn't come up with a transport that will be ...
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2answers
244 views

The 2 terrorist chatroom cipher

you are finally here! We need your help, a group of terrorists have been talking to each other on their newly developed "HackerChat" app and we think they are up to something. Here are the logs: <...
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1answer
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Deciphering Old Runes (or: What's The Program?)

Some background: I was going through some old photos of mine, and I came across old doodles I had made during algorithms class (while getting my bachelor's in computer science). I remember these ...
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1answer
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A Friendly Challenge Cipher

I have bought a game card for a friend for his birthday. One of those cards that comes with a code that you enter for in-game currency, but I can't just let him have it without messing with him a ...
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What type of code is this?

Xijtqfs, eje zpv hfu ju? Zft Cptt. If epfto'u lopx ju't hpof. Hppe, Xibu bcpvu Kbnft boe Iboobi? Kbnft jt bmsjhiu, uibu ofx Tibqf-Tijgujfs Qspupuzqf jt hsfbu. Iboobi jt opx cfjoh dpmmfdufe. Hppe, uibu'...
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4answers
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A cipher for people who don't normally enjoy ciphers

I've never been a fan of ciphers/encryption. Truth be told, despite my love of puzzles (and the amount of time I spend here on Puzzling.SE), I'm just no good at them and haven't properly learnt the ...
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Word Cipher with seemingly random numbers

I came across this interesting puzzle and have failed to crack it for more than three days. Can you solve it? m.imdb.com/title/tt2039338/ L=9, 20, [2x5], 6, 17, 13 W=38 The only tips I ...
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1answer
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Riddle of Alschen

In Alschen, in 1999, a boy woke up on a nice morning only to discover a riddle on some paper under his bed. He took it to his mother who was shocked. His mother then showed the riddle to all of his ...
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Where did my uncle go?

That damned uncle of mine! Running out without telling us has become too commonplace in our house. I did manage to find these two nonograms and a note this time though. "Fear not nephew! I am ...
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3answers
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Cipher: No idea where to begin

Ok so I have this cipher which I have no idea what to do with. I have tried most substitution ciphers I know of and still have no idea. Brute forcing with frequency analysis also yielded no results. ...
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A hexagon cipher

Note: This question looks like spam, but it isn't. All the "spamminess" is intentional and crucial to solve the puzzle I have received an email and this was attached to it: What does this mean? ...
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1answer
270 views

Election Day is upon us!

Some election mayhem! Any puzzlers here or regulars excited? This is a picross or nonogram, for information about it and how to approach, please go here. Wanted to make my first short and easy ...
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To Squanch or not to Squanch: That is the Squanch

I've been thinking about Squanchics (how we Squanch words) and language in general. I really Squanch that it matters not if Squanch uses words we are familiar with when they are Squanching or ...
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Close encounter of the orthographical kind

Over here! Hey! People! Thank goodness. I managed to escape. I was held captive in a Keerg spaceship hovering high above the continental United States. They pointed on different places on a map and ...
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1answer
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Horror Episode #2: Not So Well

You get a call from an old friend to come to a pavilion in the woods that you and him camped out at as young teenagers. The reason being is that there was a well put in place a few months ago there. ...
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1answer
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I have a puzzle and a solution… it's the method I'm after

The cipher message is: J B A Z R X K Z N T W K O Y E Z The answer is: T O N G L A N D B R I D G E How did I (or more accurately my father) arrive at the answer?
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I love baking, do you too?

I love programming, it's so fun Just get every computer in the world And just do program as much as you can Because with everyone on your side you can never go wrong with programming And no, ...
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A Spooky Encryption

The following message has been encrypted using a total of 6 different methods. Can you decipher the original message? E8EBB8E8B8BB02B8BA8EBA3AA05DDC5717475DC75D Hint for First Step: Hint for ...
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The strange encoding

Good luck trying to solve this riddle. ...
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Find the well-known Christmas song

14 25 15 9 3 7 2 6 4 7 2 9 1 1 14 25 15 9 3 7 2 6 4 7 2 9 1 1 2 15 26 19 1 4 16 1 7 4 9 1 7 14 8 5 25 15 4 5 13 3 5 13 14 25 15 9 3 7 2 6 4 7 2 9 1 1 14 25 15 9 3 7 2 6 4 7 2 9 1 1 2 15 26 19 1 4 16 1 ...
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Stuck trying to figure out a hidden message

As part of an ongoing "treasure hunt" in an online game that I take part in, there have been several forum posts made in an attempt to hint the participants to finding certain locations. However, ...
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The “foo” encoding

This puzzle has been solved. Please skip to the bottom of this question for the answer. Introducing the mysterious foo encoding... based on the common computer programming template variables ...