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.
1,577
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Not the Genesis of a Break
The following cryptic clues are in English, don't include punctuation, and have a theme (except for one minor exception) which will provide context for the definitions of the clue. There are two main ...
9
votes
0answers
228 views
The Vanished Violinist
The inspector sighed as she lifted her head from the mess of notes, scribbles and diagrams on the desk. The air in the office was so thick she could barely make up the "no smoking" sign ...
2
votes
1answer
73 views
A Short Readable Note
Back in high school when I was in a math class, I came up with a brief note that I didn't end up sending. Can you tell what it says?
!r!k6ⲗonrncⲗ
There is no ...
2
votes
2answers
198 views
A strange Letter
1: Hey, could you please give me your car tomorrow? I have to go to the movie.
2: No, I don't think so.
1: Hey c'mon. You're my brother. You must help me. You ain't using it anyway.
2: Of course, I am ...
8
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2answers
599 views
U cant s0lv th!s haha - who am I?
I got a cryptic (or maybe just junk) message in my inbox today:
...
2
votes
1answer
182 views
Have you this knowledge?
This is special puzzle, with no story. It should be very easy for people who know what is this:
GgcuuUcaGuUgUauAuuUguUaa
The target is to find the word from that string.
And, if you really want to ...
2
votes
1answer
355 views
Looking foward to the Message
Some words of wisdom from a good friend of mine. He sent it to me in a form of a puzzle for me to work out:
1) Integral - killer's initials and victims end (3)
2) Stiff, dull-spoken. (5)
3) Sheep ...
2
votes
1answer
345 views
Ohh, NSA Again?
So I decided to write this puzzle with a story, something like that, hope you like it. Happy puzzling! Here is a story:
The undercover agent John had infiltrated a terrorist cell. They were planning ...
15
votes
1answer
207 views
Graylocke's Rotting Marble Box
So Graylocke Inc. (the previously hidden competitor to Retudin's Mazes Inc. mentioned here) has produced a new product just in time for the holiday season. We present to you Graylocke's Rotting ...
0
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0answers
117 views
Cryptogram with one frequent letter and other letters random
I arrived at this ciphertext as a result of a particular decryption step from the famous unsolved "Kryptos 4" cipher. It has a very unusual letter distribution:
?...
13
votes
1answer
295 views
Captain Clumsy's crummy communication
An entry in Fortnightly Topic Challenge #45: Flags
Captain Clumsy never ceases to amaze me... This morning I was down at the dockside when I heard a shout from a nearby ship. Steeling myself, I ...
7
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0answers
130 views
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\...
4
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1answer
97 views
Did you go inside, or…?
The following underscores represent the letters in a sentence. There are extra spaces between some, indicating a word delimiter. Punctuation is included in the sentence.
...
9
votes
1answer
680 views
Density™ 4… Will there be more?
The original puzzle contained a mistake, this has now been fixed. I'm really sorry about that!
Last Density™ puzzle is here: Density™ 3 - The Game!, will there be more Density™ puzzles in future? This ...
13
votes
4answers
455 views
Who murdered His Majesty the King?
Furious, the chief officer of London's police force stood in the foyer of the late Majesty's mansion, trying to compose himself. Sitting before him were the three suspects, Toby and Ned (whom he'd ...
13
votes
3answers
359 views
Density™ 3 - The Game!
The last Density™ puzzle (here: Density™ finally back from holiday!) proved that OP plays too many games, so we went ahead and created a game of our own!
If you'd like to create your own Density™ ...
7
votes
1answer
216 views
Expanding on a classic
From the simple caesar to the seemingly uncrackable elliptic curve, there are countless ways to obscure - and even hide - a sensitive message. Cryptography is quite interesting in this way. I find the ...
0
votes
1answer
113 views
What's my favorite number?
What is my favorite number?
You need to find my favorite number from the clues shown below and the hints.
I am in cars, but not in buses.
I have two in cucumbers, and two in clicks.
I am in ...
4
votes
1answer
113 views
Negative Meta Post
Behold, the first (predictably negatively scored) meta post on the main site.
To puzzle posters of this site:
123##456 sacrifices 123#456.
If you're going to focus on 123##456 over 123#456, you ...
0
votes
1answer
110 views
Decrypting an image-based cipher I found online
My buddy shared an image with me that has the following characters (above which are written interpretations my friend came up with). I have no idea what it says, but we're interested in finding out (...
15
votes
2answers
356 views
Anarchists corrupted my barcode!
Somebody corrupted my QR Code.
Can you tell me who did this and when it happened?
Hint:
3
votes
1answer
249 views
What type of puzzles do I like?
Zeur Tdconprziies
Stevia rebaudiana (17)
Predictable (4)
Kirby (6)
Tetromino minesweeper (3)
And a mixture of:
fort to is "Word
Hint:
Hint 2:
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2answers
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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 ...
3
votes
0answers
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Help With Dan Brown's Unsolved Puzzle
Dan Brown has an unsolved message on his website https://danbrown.com/
There are hidden symbols on 5 JPG images and 5 PNG images that overlay the JPGs.
JPG Images: int1.bg.jpg, int2.bg.jpg, int3.bg....
21
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1answer
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1answer
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What's up with these words, eh?
hello there = llehht oere
Voldemort's Wrath = dloVrome s'ttarWh
This is weird, right? = sihT si riewr ,dthgi?
Just figure out what is happening to these words. = tsuJgif eru tuotahw si ppahnineot ...
4
votes
1answer
169 views
Decipher the language
An alien planet called EMJ-26 has an alphabet that has letters switched around. Their language is identical to english but they use different letters.
Here are the names of some countries on earth ...
-3
votes
1answer
138 views
Wait a minute…Where did he go? (part 1)
A secret person hid three rolls of paper under my bed
First roll: you'll find my country only if you solve this puzzle
'3rd of 2, 1st of 2, 2nd of 6, 3rd of 2, 1st of 3, 3rd of 2'
Second roll: you'...
7
votes
2answers
594 views
The physicist's puzzle
An unknown physic1st left behind this puzzle with his belongin9s and he can no longer Be found. Here is the puzzle he left with u5 before disappEaring.
Can you figure who this mysterious physicist was ...
12
votes
1answer
272 views
The Case of the Poisoned Poet
I was in my office, trying to officiate a disagreement between Misters Jack Daniels and Jim Beam, when the dame walked in. She wore a slinky dress and glasses so dark all I could see in them was the ...
9
votes
1answer
316 views
It's your turn now!
What is the simple rule behind these three relations below?
$F$ $\rightarrow$ $C$ :: $R$ $\rightarrow$ $I$ $\rightarrow$ $\sqrt{F}$ ::
$IA$ $\rightarrow$ $D$
3
votes
2answers
262 views
Where does my friend live? 5
Other questions in this series can be found here.
One of my friends, Com, has sent me a code to show where he lives:
ARIA, ---, ---, ESIA, ---, KAAN, KYAN, LAIA, ---, MOVA, RUIA, TAAN, TUAN, UKNE, --...
11
votes
1answer
408 views
What are these holes in my Connect Wall?
An entry in Fortnightly Topic Challenge #42: Wordless Connecting Walls
"Why on earth are there blank spaces in your connect wall?"
"In my defense, you just asked me to make categories ...
9
votes
1answer
207 views
The Painted Barcode
Someone spilled paint on what looks to be some sort of barcode, although I am not entirely sure that's what it is.
Can you figure out what the original message may have been?
Hint 1
Hint 2
Hint 3
7
votes
1answer
361 views
A (cipher?) puzzle in a YouTube video description
So, by chance I stumbled upon this video: MASTER BOOT RECORD - C:\DEFRAG that contains the following puzzle in the video description:
066 097 099 107 119 097 114 100 032 097 110 100 032 102 111 114 ...
0
votes
1answer
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Simple letter subs with a twist!
Here's your typical letter substitution puzzle that you can solve, no tricks.
But even so, there's a twist! Decipher this and find out the hidden message!
xhtm tm ytxeanyyq nofxhea wdccye mf jerfje ...
7
votes
1answer
474 views
Try to decipher this puzzle; It's cipher is historical
A individual known for Polygraphiae...
Gpqg atxr bqocq, ucl tzv rip gkmv iu ydw ynpa nkdk?
Gvxi jamy dj przcl Gagmguon sd droabp, jxughv rge cgvx!
Luvl fycw!
If too hard, ask for a clue and you will ...
3
votes
1answer
113 views
Rune Ciphertext (Presumably multi-enciphered )
Here is a cryptogram:
Note: this is not, very very hard. But still, it is not very very easy, I would want to say with a few clues it's more easy than hard:
Clues:
It can be simple substitution.
It ...
-1
votes
1answer
69 views
Crypted Gobbledygook, Decrypted Obvious
When it is crypted, it is gobbledygook, when it is decrypted everyone who reads it here understands!
zorrqpxj gzu
fuebmtvbkexjt gzu
baq
Happing decoding :)
2
votes
1answer
248 views
Masyu puzzle with secret code
What secret code is hidden in this masyu puzzle?
Note: The regions marked with x are not to be drawn
3
votes
1answer
206 views
Who fulfills the logic?
Imagine you are on a spaceship. To activate this machine, you have to enter a code with these given clues.
1110C1742
0110F1230
1001B1126
--------------
You have to enter the fourth code using one of ...
7
votes
2answers
169 views
Pigpen cipher makes no sense
My father in law made a pig pen cipher. Gave me a coding matrix and I know the message is spelled backwards but I still can’t figure it out. Can someone help?
3
votes
1answer
125 views
A Word + Number Puzzle
This is a code:
27 15 68 28 29 16 said that
'53 95 62 18 65 92 22 19 7 8 74 102 90 49.'
What is the secret behind?
26
votes
1answer
848 views
Tubariphobia - The fear of pickles
There are many topics that polarize. But not a single topic comes close to the one and only age-old question that some claim is the root of all division between people: "Are pickles disgusting or ...
4
votes
1answer
312 views
Kaboom-y numbers!
Here is a new type of puzzle poem I made. Enjoy!
Note: The title is named like that for a reason.
I have a number in mind, it is super cool,
But there's something you need to know, or you will find ...
13
votes
1answer
503 views
An eye for style
My colour-blind friend and I play in the same Dungeons and Dragons campaign. Our party had just died in a horrendously managed battle against a dracolisk (seriously, don't ask!) and so we were back to ...
14
votes
1answer
555 views
Following Rotting Links
Here's some examples of rotting links. Why are they rotting, and what links them?
Lebanon - ROT -> Slovenia
Monaco - ROT -> Slovenia
European Union - ROT -> Slovenia - ROT -> Antarctica
...
2
votes
1answer
259 views
There is a poem hidden in this puzzle. Can you solve it?
Гӓд ӓв aӱӑ фɑҙӑз, нӑӱн ӓв ӑӱлд,
Лӧд ӑӱвӑр aӱӑ фɑфләң хйuмӑн рёс,
Бӥнiҫ хuз iтɜнл лӧ в̈i хӑӱлд
...
9
votes
1answer
161 views
A bird-brained cipher
Today my partner, an avid ornithologist who I swear spends his whole day looking at codes and tables online, left me this cryptic clue when I asked where he had been all day. He complained about a ...
7
votes
1answer
203 views
Can you help to secure the sky?
You sit in an airplane high up in the sky, happy to be able to travel again. All of the sudden the man next to you dies. Don't panic! You see pen and paper on the tiny desk in front of him. There is a ...
