Questions tagged [cipher]
A cipher is a simple method of modifying messages to make them unreadable except to readers who know the key. Common ciphers are Caesar, Vigenere, Atbash, and several types of substitution cipher. Other ciphers include polygraphic ciphers such as Playfair and Foursquare and numerical ciphers such as Polybius and Nihilist. Cipher puzzles sometimes make use of data encodings like Morse, Binary, or Base64.
1,991 questions
7
votes
2
answers
317
views
Solve the Cipher, Find the Passphrase
So just for context - my (now former) coworker Megan is a HUGE nerd, but she's always been a bit of a troublemaker too. I mean, she once got caught stealing some monitors and managed to get off with ...
- 433
3
votes
0
answers
219
views
Supposed pigpen or rosicrucian cipher
There are more variations than the one present in the image, but the most used letters are certainly present. I tried letter frequency, word searching. The plain text language is most likely Romanian.
...
0
votes
0
answers
86
views
Shadowed Dragon Ciphers: #2
This is the SHADOW Cipher in a small sample. One of my hardest, Good Luck!:
Z+b s v k v x w z d o x
-The Shadowed Dragon
2
votes
1
answer
369
views
A Cypher I Created: U+74 U+48 U+65 U+20 U+72 U+65 U+61 ...
This is a compound cypher meaning it is several cypher methods inside of each other.
U+74 U+48 U+65 U+20 U+72 U+65 U+61 U+70 U+65 U+72 U+20 U+69 U+73 U+20 U+43 U+4F U+6D U+69 U+4E U+67 U+20 U+61 U+4E ...
28
votes
2
answers
802
views
2-Dimensional Music
I've been listening to 1-dimensional music for most of my life. You know, the flat kind that only moves forward in time.
Only recently did I discover 2-dimensional music!
It really adds depth to the ...
- 8,065
5
votes
1
answer
339
views
Number Mapping Riddle - How does F work?
Here is the mapping F: {0, 1, …, 63} —> N.
F(0) = F(1) = 11029
F(2) = F(3) = 8263
F(4) = F(5) = F(6) = F(7) = 12992
F(8) = F(9) = 14188
F(10) = F(11) = F(14) = 347870
F(12) = F(13) = 2697
F(15) = ...
- 5,192
2
votes
1
answer
295
views
A missing destination
My petrolhead friend Julius is off on another road trip, and they won't tell me where. They only sent me this string of numbers:
21 32 33 01 41 36 22 90 40
Which country are they headed to?
Hint 1:
- 411
8
votes
2
answers
567
views
A missing Country
I received a note from a friend, a scientist and amateur mathematician, who seemed to be going away on a mysterious trip. The address of the place he said he'll be staying is
Nice Blan Hall .k.v
But ...
- 337
12
votes
2
answers
1k
views
Can you open the safe?
Transcription:
Pay attention. Don't miss any clues
Now, go to the list below
Find the number in disguise
It will lead you to the code
232323
1415165
1911916
1221423
Hint
- 10.2k
5
votes
1
answer
170
views
A numerical cipher
Forbidden fruit 5001338730
26 letters 9503K97020
Engineer, Futurist, and Inventor 4101R06188
Travel document 4938C62829
Fruit and color 8033310000
Puzzle Which one does not end with "SU"?
- 7,978
3
votes
0
answers
306
views
Code Red - This is not a drill
Yesterday I was working with my team and our company, Sigma Security, got a swarm of requests. We didn't think much about it at first, because we launched a new product. Suddenly we got ping and FTP ...
- 1,704
10
votes
1
answer
932
views
What's his name? What did he learn?
Moreoff out fake death
Poor oversat this outbumpyyouoff subtracts from income
- 10.2k
2
votes
1
answer
407
views
Decrypting a flag found during a pentest in class: 31 31 34 20 31 35 ...
In a class for my master's degree in cybersecurity, we had a pentest exercise where we needed to look for flags all around the testing machine. This one is flag10. I found where it was hidden, and ...
- 31
5
votes
1
answer
665
views
Circular Cryptogram from book
I have been working through this book https://www.amazon.com/dp/B0FC6BJ677 and I am stuck on this puzzle. There are answers in the back that I will look at if I can't solve it but I am looking for an ...
- 53
6
votes
2
answers
1k
views
A brand new cipher you've never heard of
Most people are familiar with ciphers like the Caesar cipher, the Atbash cipher, and the Vigenère cipher. While these are classic and interesting, they can become a bit repetitive over time. So, I ...
- 13.9k
6
votes
2
answers
398
views
What does this encrypted message say? '21', 'W', '2W', '33', '34', '2T', ...
'21', 'W', '2W', '33', '34', '2T', 'W', '3D', '33', '39', 'W', '2W', '2P', '2S', 'W', '2U', '39', '32', 'W', '2P', '32', '2S', 'W', '30', '2T', '2P', '36', '32', '2T', '2S', 'W', '37', '33', '31', '2T'...
- 1,567
-2
votes
1
answer
181
views
Solve this cipher. It's easy... if you know what it is
I was messaging some friends on Telegram and found it to be too user-friendly. I didn't think it would be hard to make my own messaging service, but the letters C, J, Q, V, X, and Z kept messing up ...
- 1,567
-4
votes
1
answer
175
views
Decrypting this binary message
Try decrypting the following message:
0100010001011100101110010011000110000110100000111000100000110010001100000011100110110001000001101000110110100000
Hints:
The ...
-6
votes
1
answer
143
views
A Hill Cipher-- with a catch
A Hill Cipher-- with a catch. The key is hidden in plain sight if you know where to look.
3 8 67 71 71 70 87 72 85 76 65 78 86 86 83 81 82 82 74 66 90 83 85 85 82 68 90 68 85 85 15 23
- 1,567
10
votes
1
answer
693
views
If in doubt, flat out
You find this:
HpL HpL Jmp SqR 50 HpL 50 SqR Jmp SqL 100 AcR 100 AcL 100 SqR Jmp SqR
100 Jmp 100 AcR 100 AcL 100 Jmp 50 SqL HpL SqL 100 Jmp SqL HpR HpR Jmp
SqR 100 HpL 50 SqR 50 SqL 50 HpR 100 Jmp 100 ...
- 14.3k
16
votes
1
answer
3k
views
There are no employees at the store. Why not?
Janice goes to the print shop, but is very confused. There are no employees, but there is a big poster hung on the wall that could explain this. Unfortunately, it's unintelligible.
The sign reads:
<...
- 1,735
-3
votes
1
answer
217
views
R’ɇvi hννm gsv ιι⧫lh…γfg
I created a cipher for a loved one to solve, who is interested in puzzles like this. However, a majority of reddit couldn’t solve it. I don’t have much experience making my own and I don’t want it to ...
- 11
3
votes
1
answer
385
views
Code from a friend with weird symbols and a row of numbers
This is in English, I'm pretty sure.
I think there aren't any spaces, but that's just a theory. And if there are spaces, it might be a different symbol different for each row.
Also, this is an ...
- 31
2
votes
1
answer
178
views
Conversation Mystery
Here’s a text conversation between me and my friend:
Me(15:00): W1 2 could’t you receive 5 <...
- 5,192
-2
votes
1
answer
683
views
I'm 130,814 years old!
Please answer the below question.
I'm 130,814 years old!
There's a space after me on the dance floor!
How is you-HELP! I'm ge-FTPzIVDU/...
- 73
2
votes
1
answer
439
views
Who’s the criminal?
Someone kidnapped James (17), the friendly high-schooler. James left a message, which seems related to a criminal.
The message was:
CJBFHNZHEJZL (-Q)
Here are some suspects/witnesses and their ...
- 5,192
9
votes
1
answer
379
views
Decipher VHMFPXHM
Here is a cipher for you to crack!
VHMFPXHM
Original, right? I think that came out pretty good. Good ahead and solve it now. I'll wait.
Made out the message yet?
Oops, hold on. Before posting ...
- 1,910
13
votes
1
answer
329
views
Please translate my age
EDIT: Provided alternate symbols in brackets.
Hi, my name is Omar. It's not really, but you wouldn't be able to pronounce my real name. I'm not from your planet. I've been able to learn your language, ...
- 1,465
5
votes
1
answer
639
views
"Binary" Coded Message
My brother taught a group of 8th graders a class on binary, including a brief description of how binary numbers can be used to encode the alphabet (0110 0001 for <...
- 159
5
votes
1
answer
336
views
Solanum's Greetings
Clues:
[Contextual image - church and town scene with an asteroid in the sky, several letters in random order]
Inside the image is the formula I6S1(SS)6W5.
Three hexagons with circles at the vertices. ...
- 839
1
vote
0
answers
174
views
A puzzle of animals and numbers
This is a group of numbers, that when decoded, gives the story of four animals. You can't really decode the animals, but just note that some of these numbers are corresponded to animals.
...
- 55
12
votes
1
answer
391
views
PSE Advent Calendar 2024 (Day 20): Holly
This puzzle is part of the Puzzling Stack Exchange Advent Calendar 2024. The accepted answer to this question will be awarded a bounty worth 50 reputation.< Previous Door Next Door >
Find the ...
- 479
15
votes
1
answer
955
views
National Flags using Playing Cards
I have formed some of the national flags using playing cards of suits hearts and clubs.
13 cards of hearts are arranged as follows:
Using these cards,
13 cards of clubs are arranged as follows:
Using ...
- 6,137
2
votes
1
answer
248
views
Two visual codes
Here are two codes I can't seem to break.
I have no idea for the first one, and I found some interesting things for the second.
The answer is supposed to either be an English word/phrase, or a number ...
- 21
19
votes
1
answer
698
views
PSE Advent Calendar 2024 (Day 10): Locked Christmas Present
This puzzle is part of the Puzzling Stack Exchange Advent Calendar 2024. The accepted answer to this question will be awarded a bounty worth 50 reputation.< Previous Door Next Door >
Woohoo! I ...
- 8,065
17
votes
1
answer
773
views
PSE Advent Calendar 2024 (Day 6): Colorful Gifts
This puzzle is part of the Puzzling Stack Exchange Advent Calendar 2024. The accepted answer to this question will be awarded a bounty worth 50 reputation.< Previous Door Next Door >
It’s ...
- 479
3
votes
0
answers
193
views
Strange Unsolved Cipher on Youtube from 2014
I recently came across a strange YouTube channel from 2014 called Arcus Grid, containing a puzzle which has seemingly never been solved. It's been posted to Reddit a couple of times, but nobody has ...
- 31
1
vote
1
answer
222
views
Can you decipher this transliterated paragraph?
The following text printed in Cyrillic contains a transliterated paragraph in a language that does not use the Cyrillic alphabet. Decrypt it and translate it to English.
Hint:
Њин жиґ ла, њин жиґ ла ...
- 125
9
votes
2
answers
900
views
Stopping the bank robbers
A notorious gang of bank robbers use simple one time pads each time they plan a robbery. That is they represent a blank space as the number 0, the letters a to z as the numbers 1 to 26, and ".&...
- 1,181
3
votes
0
answers
317
views
3
votes
0
answers
324
views
Decode missing scientist's last message
It was widely rumoured in the scientific community that Professor Kettleworth was trying to use her work on interchanging position and momentum operators to develop a working time machine. The ...
- 1,181
6
votes
1
answer
380
views
A cipher with a little twist
I'm unsure how hard this cipher text will be for experienced solvers. Possibly very easy. Maybe you'll at least spot what I did to try to make it a bit harder.
So my questions are:
What does it say?
...
- 1,064
11
votes
1
answer
563
views
Cipher seen while walking
I was walking and saw this cipher does any one know how to crack it?
user96008
0
votes
1
answer
331
views
Logic Code Puzzle: PIANO -> KRBML?
In a certain code language, if "PIANO" is written as "KRBML", then how will "PRIME" be written in the same code language?
Options:
a) TRJCK
b) TRKCK
c) TRJGO
d) TRJKC
- 19
2
votes
0
answers
135
views
How would I go about solving this Ben Drowned cipher?
This cipher is from Arc 3 of Ben Drowned. It is found within a few frames of this video, at 6 seconds in. It is not the spectrogram that is happening at the same time, which was ultimately translated ...
- 41
2
votes
0
answers
177
views
Looking to solve a puzzle from Ben Drowned called "The Glitch Cipher"
This cipher is from Arc 2 of Ben Drowned, and was visible for only a few minutes on the homepage on October 6, 2010. It has not yet been solved. Boxentriq's Cipher Identifier says the cipher is likely ...
- 41
16
votes
1
answer
529
views
1
vote
0
answers
165
views
Code-Breaking Riddle
My friend sent me this puzzle.
I have a few 306-character strings of all seemingly random capital letters. Here are some examples:
...
- 111
8
votes
0
answers
258
views
Third Time's The Charm
(code 1) = COMMA = PSYCH
APEIRON = (code 2) = FRANKEN
ROSEN EELS = LUSAKA AND = (code 3)
? (5) = (Japanese city) = (TF2 class)
(Tasty) = ? (6) = (Round)
(Rumors) = ? (6) = (Response of affirmation)
(...
- 1,084
10
votes
2
answers
744
views
The Celestial Mr. Harrison
Clues:
Wow! [in red] with red oval encompassing number 2, black circle around 3, and the numbers 1 and 4.
Group of 18 black circles with numbers in a matrix.
Top Row: [6, _, 36, 23, blood drop, 145]
...
- 839