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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A periodic message

I was wandering around on Capitol Hill recently, not paying attention to where I was, thinking about codes and ciphers, when suddenly it hit me. No, really: a blast of wind blew a paper right into my ...
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Need help with an online puzzle / riddle

I found this online riddle at m4tr1x.ws, but now I am stuck. It seems you need to gain deeper and deeper access to this virtual Matrix-style computer system. First you need to create an account via ...
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The Coded Chessboard

"If you're worthy, the secret is found within you," the wise old lady had told you before you had entered the villain's lair. When the townspeople had told you to seek her out for advice, you thought ...
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3answers
224 views

Defuse… It's going to blast!

You are an intelligent decoder. The FBI now needs your help to defuse a bomb. You move near it and find the following notes. You have a glance at the notes. You are now ready to decode and defuse.. ...
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A journey to find me

The task is to find a word which is mostly used as a symbol in Math and Physics. It is also a giant in space. Find the appropriate links from the below hints. The links (imgur- pages) will further ...
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1answer
126 views

My sports program

This is my daily sports program: First exercise: 1) Stand up 2) Got on your knees 3) Keep both arms on your body 4) Pause 5) Lean your body slightly to the left Second exercise: ...
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Ooohh, it all makes sense now! :D

Introduction As requested by @Rubio, I am here to state that this is a metapuzzle based on other puzzles listed below. "Ooohh, it all makes sense now! :D" ~ Mr Pie The Puzzle Or does it? Answer is ...
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Not Just Black and White

Answer for this puzzle is one word. Have fun! Highlighted parts are where I realised I have clued it wrong... Sorry for all this inconvenience! Hint: usefulness level 1 usefulness level 2 This ...
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What causes these signs to follow this relation?

Can you find why does the below relation hold true? Hint 1 Hint 2
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White and black, white and black?

Can you find what comes in place of $???$ Hint:
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1answer
90 views

Decipher this three times, periodically

After hanging around this site for a little while I finally decided to put together a cipher for my first puzzle. I hope you guys enjoy it. ...
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129 views

Decode the message

Try to decode this message: y08 700) 07734 Hint: Hint
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6x7 Pokemon-based cipher

My friend made this cipher for me to solve and it has me stumped. Wondered if anyone else would want to take a crack at it. All it is is this image: Names of the pokemon in order are (assuming I ...
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204 views

Decode this for the right answer

ABABAAABAAAABAABAABAABABBAABAAAAAAABAAAAABAAAAABBAAABBBBAABAAAAAAABBAAAABBAABABAAABAA This an encrypted text. You need to decrypt it and encrypt it again to get the right answer.
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1answer
220 views

Riddle to Code 2: The return of numbers

The first is a pirates favorite letter. The second is from a famous quote of shakespear. The third is squaring it off in a famous formula. The fourth is the first in a very well known song. ...
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201 views

Oops!!! Dropped it again!

I have dropped my laptop twice in the past and luckily nothing went wrong. Today while getting ready for college, I dropped it again - for the third time. This time, something is wrong. When I ...
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1answer
154 views

color coded puzzle

Help me solve this problem. As this site appreciates a little effort from the person who posted it. Here's my thought process: 1) The matrix starts with 0 ( gr, gr, gr). It has three places which can ...
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1answer
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Elementary, my dear …

My list for today Iodine-Sulfur+Americium-Scandium:Phosphorus Iodine-Titanium+Molybdenum+Thorium+Yttrium-Lithium:Helium Praseodymium+Oxygen+Vanadium+Erbium+Boron+Sulfur-Lithium:Aluminum ...
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Absent Employee's Password

You are the boss at an engineering firm. Recently a rather eccentric employee named Mr. Robemer made an abrupt exit when you accused him of devoting his worktime to his hobbies. Robemer stormed out ...
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1answer
102 views

Musical Chairs Cipher: Double Trouble

This question is a continuation of the first question: Musical Chairs Cipher. The basic rules: Six children -- Alice, Ben, Carl, Denise, Eddie, and Flo -- are playing a game of musical chairs in ...
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1answer
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Musical Chairs Cipher: Intermediate

This question is a continuation of the first question: Musical Chairs Cipher. The basic rules: Six children -- Alice, Ben, Carl, Denise, Eddie, and Flo -- are playing a game of musical chairs in ...
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3answers
514 views

A Salute to Poetry

In honor of National Poetry Day (which happens to be March 21st - go figure), I have crafted a puzzle which I hope will do a small bit of justice to this day. Carefully hidden in the four sections ...
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542 views

Baby don't hurt me no more

You've been taken captive by a spy organization who seems convinced you're an agent for the other side. You've already spent a miserable day of questioning and torture and have no wish to spend ...
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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
127 views

Cricket or Cipher?

Congrats Bass for finding the answer of Find this Cricket terminology Find the names of three Cricket stadiums from the below codes: 1. dy30q7i 2. 23jgo36 3. 5y39fqo
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1answer
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Where is Steve?

Steve is a modern painter. He and his brother live in England. Today his brother found him missing. He searched everywhere, but couldn't find Steve. But in Steve's room, he found the below painting. ...
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1answer
599 views

Find my name from this list of symbols

From the symbols below, find my name? # ! # @ * @ & \$ ^ # * # \$ #
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101 views

Hiker's Cabin Mystery | Pt. IX

You are starting to feel a strange affinity towards this mysterious hiker as you head over to (Answer to Part VIII) as per his instruction. As you walk inside, you notice a man standing at the ...
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1answer
90 views

Some music sheet to decode

Find the word that was encoded in this music sheet: (No instrument is required)
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1answer
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A married couple

Disclaimer: This puzzle is from a university in Israel, computer science. Its in a real document written in Hebrew so no point in posting it. There is no link to it on the internet. There is a couple ...
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1answer
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Hiker's Cabin Mystery | Pt. VIII

Part VII is still up for grabs! At last! You've solved the mystery of the cards! Now that you've gotten into the hiker's computer in the hotel room, it's time to explore! Good news! There is only ...
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1answer
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Pentagon chipher

Please help! Its a swedish scoutcipher.
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1answer
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Beginner CryptoGram - Msgs From Your Puzzle Community

I like simple ciphers. Here is one, no tricks, alpha-numeric substitutions only:
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Find the celestial body

Last week, a group of 5 astronauts went on a space-tour. They accidentally got crashed on a celestial body in space. Luckily no one was harmed! They were amazed to see some highly intelligent aliens ...
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1answer
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Hiker's Cabin Mystery | Pt. VI

The only part that doesn't have an answer yet is Part II! Chop, chop! You finally are able to get out of the airport after quickly solving the mystery. You are becoming quite the detective! Only... ...
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2answers
223 views

Find the cipher used

Each of the following lines were said by various famous personalities. Each line corresponds to one person. There is no relation between these lines. After obtaining the names of these people, A 6 ...
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2answers
312 views

Hiker's Cabin Mystery | Pt. III

See Part I | See Part II < needs answer!! Finally, you've gained access to his files... but the filenames are all encrypted! Oh, no! You only have one chance to open the files! Which one should ...
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1answer
118 views

The “Jumbled” Cipher

The elusive "Jumbled" cipher has stumped scientists and cryptographers alike... Not really, but it will stump you soon... The Jumbled Cipher is a mysterious text cipher that puts text into an ...
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1answer
133 views

Mutineer's Treasure

Background: Your team has recovered a sunken ship. In the hold there is a small room that appears it was intended as a smuggler's room. In the smuggler's hold are three decayed corpses a bunch of ...
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1answer
332 views

Is it a word? Really?

Grandpa says: show that the following number equals a 5 letter word with multiple meanings (one of them not good) I I I X I I X I I X I I I X I I X I I I was wondering if that silly thing ...
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1answer
127 views

This is my cipher

Solve the following: Ujlw oz vi ovdwui, Ncep hs ob xuuo, T'yz miamy hfid ujlw, Htu etr sqp eiic. Hint: Hint 2: Hint 2a: Hint 2b: Hint 2c: Hint 2d:
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Hiker's Cabin Mystery

See Part II | See Part III On a hiking trip, you find a piece of paper on the desk of an abandoned cabin: Also on this desk is an old-fashioned computer that is, unfortunately, password-protected. ...
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1answer
350 views

The Librarian's Labyrinth - Part III

"This Library is HUGE!," You say aloud. You hear your voice echoing through the halls and nothing else. How could this be? Who comes here? You start examining the books on the shelves. It's just your ...
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2answers
178 views

Just a Simple Number Crossword

I made a small number crossword for my mathletes club that I thought I'd share. It's not too hard, I think it's just right for a coffee break. Have fun! (Edit: No answer has a leading zero)
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History Calls - Twice!

You'd send a letter to me, but I'm not quite what you think. You'd send a letter in me, but only if you didn't know me. I was a gem in my day for being both bold and precise. I stood ...
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1answer
481 views

A letter with no particular backstory

So, I was walking down the street when this paper materialized just in front of me, as if from thin air. I'm not sure if I can decipher it, maybe you can? It also smelled like fish a bit.
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A fun series of riddles!

All of the clues will lead up to the key for a Vigenere Cypher: eutnn wo vvsf. Clue 1 (from www.riddles.com) I'm by nature solitary, scarred by spear and wounded by sword, weary of battle. I ...
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Riddles and ciphers / All good ways to flex the mind / Can you solve my task?

I have arrived new / Here with ciphers for your eyes. / Can you solve this task? ...
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90 views

Cyrus' Adventure (Part 7)

The wall opened. Cyrus and T.E.D. got out of the room. Suddenly, the passageway started collapsing! Cyrus was terrified. T.E.D. grabbed Cyrus and quickly rolled out of the passageway. They got into ...
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11answers
5k views

Geography at the pixel level

(enlarged version) The answer is a group of islands.