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.
1,989 questions
0 votes
0 answers
78 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
357 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
788 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 ...
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5 votes
1 answer
338 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) = ...
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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:
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7 votes
2 answers
561 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 ...
- 327
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
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5 votes
1 answer
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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"?
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3 votes
0 answers
305 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 ...
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10 votes
1 answer
931 views
What's his name? What did he learn?
Moreoff out fake death Poor oversat this outbumpyyouoff subtracts from income
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2 votes
1 answer
406 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 ...
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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'...
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-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 ...
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