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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1k views

What does my girlfriend want me to buy for her?

I'm obviously dating up, because I can't figure out what my girlfriend wants me to buy her for Christmas. When I asked her what she wanted, she gave me the three puzzles below. The only hint she gave ...
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300 views

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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314 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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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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2answers
524 views

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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2answers
526 views

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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1answer
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Encoding Morse Code

The letters of a message are converted to Morse code, with a space between each pair of letters and two spaces between each pair of words. Each pair of elements (for example dot-space, dash-dash, and ...
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2answers
186 views

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
134 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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1answer
233 views

What do I use…?

What do I use…? Can you solve the rebus and decipher the code? Each group of four numbers represents a letter. YzNSaGJucGg=, then ...
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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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1answer
465 views

Find My Mission For Me

I am a spy for the CIA. Since I am in a hostile territory, my next mission was given to me in a very coded manner. Today, while playing chess in the local park a briefcase landed on my head. Feeling ...
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2answers
224 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
148 views

White and black, white and black?

Can you find what comes in place of $???$ Hint:
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1answer
100 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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137 views

Decode the message

Try to decode this message: y08 700) 07734 Hint: Hint
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1answer
203 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
212 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
229 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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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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2answers
240 views

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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3answers
529 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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1answer
109 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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4answers
555 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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1answer
65 views

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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1answer
368 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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119 views

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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What characteristics of a ciphertext can be indicators of a particular cipher?

If I have a ciphertext, what information about the probable ciphers used can I infer from the ciphertext itself? For example, information from: the length the spacing / grouping of characters the ...
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1answer
135 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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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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1answer
212 views

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
610 views

Find my name from this list of symbols

From the symbols below, find my name? # ! # @ * @ & \$ ^ # * # \$ #
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1answer
155 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
98 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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6answers
240 views

What words Atbash plus Caesar cipher to other words? [closed]

If you Atbash cipher plus Caesar cipher after, you get a new set of ciphers, and I tried 4-letter words for Atbash plus Caesar shift 1 and I got: cams <-> yaoi ghat <-> Utah haji <-> tars ...
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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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Binary cryptogram from a friend

My friend sent me a "puzzle" in binary, and said that there are multiple steps to solving the puzzle, all of them including decryption. I translated the binary into text and he said that was a good ...
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1answer
119 views

Pentagon chipher

Please help! Its a swedish scoutcipher.
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0answers
386 views

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
107 views

Beginner CryptoGram - Msgs From Your Puzzle Community

I like simple ciphers. Here is one, no tricks, alpha-numeric substitutions only:
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1answer
132 views

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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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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2answers
233 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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How can I translate this hexadecimal code?

I've recently gotten into cryptography and found a code which I just have not been able to decrypt. Any help? All I know is its in hexadecimal notation due to the 0x notation. Here it is: ...
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3answers
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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
137 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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3answers
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A Wacky, Wacky Chessboard (That Makes No Sense)

So yesterday I found this in the mail. A chessboard. But on the squares, things were written. Plaintext version: ...
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5answers
583 views

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
361 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 ...