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.

Filter by
Sorted by
Tagged with
4
votes
1answer
229 views

Bro's password… must've forgotten

My overseas friend has forgotten the password to his SackExpunge account, and the only information he wrote down about it was this: Username: LiveSound Password: ...
0
votes
0answers
87 views

Help deciphering number cipher

21,14,01:15,03,01:19,11,10,10:02,15,18,01:21,15:05,01,13,03,11,21,01:21,14,15,21,01:19,14,15,21:21,15,19,21:19,01,05,01:09,05,15,08,01,03:09,03:04,01,07,21,14,21:21,21,11,03,20 9,10,13,1 we ...
11
votes
2answers
461 views

Oh boi! Dis waas never Engliz! #2

This puzzle is second in the series, the first one being this. But these are related in no way. Below are some weird combinations of letters, which are actually words translated in some different ...
7
votes
1answer
381 views

Oh boi! Dis aint Engliz! #1

First some Engliz: These weird combination of letters are actually words translated in some different languages, and concatenated. Each line has one word translated in different languages. These ...
25
votes
1answer
2k views

Real life puzzle: Unknown alphabet or shorthand

User JellicleCat posted this on linguistics stackexhange a few years ago. None of us were able to come up with a satisfying answer but most seemed to agree that it was an idiosyncratic cipher or ...
15
votes
3answers
2k views

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: ...
3
votes
1answer
122 views

Cyrus' Adventure (Part 4)

Cyrus opened the box carefully. Inside there was a strange totem made of metal. Cyrus decided to keep it. Suddenly, a cupboard opened by itself, and showed a secret passageway. Cyrus grabbed other ...
12
votes
0answers
534 views

Never Completed Game - Difficult Riddle

The seventeenth of the primes. Its twin is twentynine. Po. Let’s drive. Bye, Alfonsín. Add seven triangular. Sweet. It named the Valley. This riddle is taken from https://www.nevercompletedgame....
8
votes
0answers
668 views

Crack the pigeon code

Can you crack this message? It was discovered in a chimney in 2012 attached to a carrier pigeon and was most likely sent during the D-day invasions. The GCHQ was not able to crack it, even after ...
-2
votes
1answer
181 views

UNKNOWN CIPHER - NEED HELP DETERMINING (SOLVING)

I am trying to figure out how to decrypt and also re-encrypt potentially the following, meaning that i could write a random text string and it would generate that encryption and also decrypting it ...
-4
votes
1answer
81 views

Qz heona “cvpxyr evpx” - how can I solve this?

Here is the puzzle: Qz heona “cvpxyr evpx”. Please, can you help me solve it as I am struggling! Thank you!
18
votes
3answers
659 views

What force is more potent than love?

A few quotes about Love.... What force is more potent than love? True love is selfless. It is prepared to sacrifice. We are all born for love. It is the principle of existence, and its ...
0
votes
1answer
163 views

Solve this cipher puzzle [closed]

PJb6bN5lUW3R0ZbRrfWMf4swe6CZyqBPS4GT8+bzoLE= This is a cipher that cannot figure out. It's probably a url but it doesn't look like one. I'm thinking its a math ...
7
votes
3answers
314 views

The Secret Meeting

In a special operation our unit was able to intercept encrypted chat messages from a group of spies who plan a secret meeting: Ifmmp fwfszpof! Jk Krzgb Wyt? Fwj dtz htrnsl yt ymj Sjb Djfw'x ...
10
votes
1answer
181 views

What Library? [first puzzle]

ywfwkak 33:21 ...
5
votes
1answer
176 views

At Two-Twenty-One, B, Baker Street

Inspector Jane Watson, of New Scotland Yard, paid a call on her good friends Dr. Shirley Holmes, and her roomie, the famous consulting detective Georgia Lestrade. Ms. Holmes answered the door. "Good ...
6
votes
2answers
237 views

A strange day at the beach

You are enjoying a nice day the beach when suddenly you see a note and phone floating in a bottle marqued “FREE” and you wonder how they shoved the Iphone X+ in there. Then you realize that there is a ...
3
votes
1answer
153 views

Decipher this puzzle — with clues!

I'm needing some help deciphering the following puzzle: Oi xmt gcilk vwf-cciruk Lhoyqz ccig spkb mfyt; Rnbrl uakoj tbbu gw bkgd, Wgqnb ddmu p zfoim; Viec kfs lllsmt, ywfy dg zdoc, Dtfl fu xggu, ...
1
vote
2answers
170 views

Cryptic stickers, possible riddle?

I have found these very weird stickers around my town. I followed a trail of these and found around 30 of them. They look handmade and are in different sizes, some roughly cut. The text is flipped ...
4
votes
2answers
256 views

How to decode a Codebusters Baconian Cipher?

The following strange headlines appeared in the newspaper but in reality, they are a Baconian encoded message where some letters encode as one character and the others as another in a pattern. You ...
9
votes
2answers
2k views

Morse Code I can't solve

Help me decode this morse code into plain text. I can't solve it because it has no spaces. Text version: ..-.-..--.-.-...-...-..---.--.....-....-. Ending Part Might be: -- -.-- ... . .-.. ..-. "...
3
votes
0answers
183 views

Cipher my friend sent me

"The world is: ::: :#: : ::## :### / :##: ##: #:::" My friend sent me it and said the use of the symbols : and # don't matter. It's the pattern that matters. The hints he sent were: (EDIT) I worked ...
1
vote
1answer
140 views

Riddle of Markburg

In a school located 3 kilometers below the city of Markburg. Alexander and his friend, Schim, talking about funny jokes but 1 hour later, Schim created a mysterious message with his pencil, coloring ...
9
votes
2answers
339 views

Just Another Cryptic Cryptic

Twenty-six cryptic clues -- each one a letter. Plug the letters into the cipher to get a final cryptic and a quiz question. Answer the question, and you've cracked the puzzle! Clues: Give money to ...
6
votes
1answer
136 views

5 steps answer is 3 digits plus decimal

3 digits plus decimals takes 5 steps has something to do with hex code as first step you only need a calculator and smarts
2
votes
6answers
169 views

Simple ways to encrypt a message

I am planning to organize a sort of treasure hunt and I would like to know some easy ways to encrypt a message. I'd say something in between Ceasar's Cipher -shift each letter of a word of a fixed ...
-1
votes
1answer
92 views

Please help with this cipher

💻Lets=13px go bois=13px 💻 Hint: 68 74 74 70 73 3a 2f 2f 70 61 73 74 65 62 69 6e 2e 63 6f 6d 2f 65 46 48 46 4b 52 33 4d
3
votes
1answer
240 views

An unknown Cryptogram

I would like to say : vyycd gow mcgr uuey
0
votes
2answers
199 views

Image riddle good luck

You will have to decode a secret word from this image: And then use a cipher to combine the word and decode the encoded message below Again, good luck! Encoded Message: Zeyd Iuhpchhpp
13
votes
1answer
302 views

An old inscription

A tribe that lived here centuries ago called the Rreiorclskl had been very mysterious until now: The only things known about them were that they liked poems, math and puzzles. However, very recently, ...
9
votes
1answer
206 views

The landing: part one (coded mystery)

You have just clambered out of bed when you hear a massive crash. The noise appeared to have come from your back garden. You peer out of your window and see a wooden box on the grass. While getting ...
1
vote
2answers
245 views

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 something ...
34
votes
1answer
1k views

A Morse Conundrum

Yesterday, I intercepted a message encoded in Morse code, but, because I was extremely tired, decided to wait until today to decode it to plain text. However, when I looked at the piece of paper I had ...
9
votes
5answers
242 views

What's for dessert?

Another puzzle, yay! What do I want for dessert? An element, a blue liquid you breathe. The end of a sentence. wgpz tzggjr wgvxf bmzzi mzy It's three til' 4, plus forty more. Hint:
1
vote
2answers
127 views

A Fun, Fantastic, Phonic Cipher!

An old friend of mine recently sent me an email. Being a linguist, he always finds creative (read: annoying) ways to use his words to baffle me. After about five minutes, I usually just give up. ...
6
votes
2answers
631 views

A Magical Cryptography Puzzle

The following is the first and second sentences of one of my favorite (and fairly popular) fantasy books encoded in a cipher I created a few years ago. I'm quite certain it's breakable, but hints/more ...
-3
votes
1answer
95 views

Trying to crack a code [closed]

I am trying this string set of puzzles. The last puzzle to do, began with 055 055 055 055 ...…040 056 055 055 055 055 which translated to: 77777(77777(877 …… 77(87777(87777 But I cannot work out ...
6
votes
3answers
302 views

How to Make Non-too-broad Cipher Puzzles?

// I'm not sure whether this is better to be asked here or on meta. Unfortunately, many people (or at least my friends) agree that puzzles are plainly just "random guessing" in a sense that they ...
4
votes
1answer
229 views

This picture has some hidden message. What is it?

This picture was uploaded for the Olympiads of Medicine, from Porto. While the answer might be in portuguese, I don't find it likely. I tried some Caesar Cyphers, I assumed the colours represented ...
0
votes
1answer
118 views

Need help to decipher this encrypted text

I am relatively new to deciphering texts and I have the following ciphertext: xbt ufp ekyzkikn dt nkojvhk? e ndmr jfo nggv du kwjt gun pjv. I tried Caesar Cipher but to no avail. It would be ...
7
votes
3answers
322 views

What's my favourite book?

I got a strange message from a friend a few minutes ago: You wanted to know what my favourite book was? See if you can work out the answer. I'll give you a clue: Saranac Lake \United Which ...
5
votes
1answer
113 views

PSE x Wiki x World: How can it be?

The following is a encoded first line from a Wikipedia page. Your task is to decipher it. Enjoy! 239#27#682 372#52#41#599#995 354 856 227#886#244#82#94 252#681 672#61#32#239#246#673-376-599#46#597 (...
10
votes
3answers
575 views

Where is the money?

When I was just a little kid my parents died in a terrible accident, and I was left alone in the world. When I reached the age of 18, I received an envelope with a letter that read the following: ...
4
votes
1answer
179 views

Alternating Audio Waves

Try solving this cipher from these strange memos: Memo 1 Welcome Comet, today's Thisbe plus Russell here! Memo 2 Reading outlaws loudness. Memo 3 Retro memo: Berlin today upheld voting ...
0
votes
0answers
141 views

Solve it… Uncover the mystery!

One of my friend, who is really too good with cyphers and puzzles challenged me to solve this one. I think it reveals a name, or date or some information with which he can surprise his friends. That's ...
5
votes
3answers
185 views

Same Riddle Different Answer: I am both lock and key - who am I?

NOTE: Though the body is identical to I am both lock and key - who am I?, a different answer is expected, and thus this is not a duplicate. Cyrnfr qb abg pybfr guvf dhrfgvba.Thanks! Enter! Small or ...
6
votes
3answers
502 views

My Grandpa's Box #1

My grandpa died last month. At the reading of his will, he left me a strange wooden box. A post-it-note on the side read "You were always good at puzzles." There was a number lock on the front that ...
5
votes
3answers
1k views

Is there a secret message in the first decimals of PI?

Is there a secret message encoded in the first decimals of $\pi$? Source: Vi Hart
6
votes
1answer
315 views

Crack Me 01 - Crypto Riddle

This is the encrypted message: xy}v"|y#xu|$|&a+&y}vsa*pppp*fprppp"prpp"upppzpqppp*"vptp|at~!*+p)~yr%"&t"&y}vsa* This is a riddle in parts, follow ...
3
votes
2answers
362 views

Puzzle hidden in Hannah Fry's Hello World

Hanna Fry announced today that she hid a puzzle in the cover of her book—via twitter The initial clue seems to be a binary encoding of some ASCII. I was hoping to start a thread towards finding a ...