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
297
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
216
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
368
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 ...
- 8,066
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
294
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
566
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"?
- 7,968
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