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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.
10
votes
Accepted
Help, what is Sistek saying?
I guess the answer is
The cipher
Then
The deciphering works
The decrypted messages are, in order:
Day 1 message 1:
Day 1 message 2:
Day 1 message 3:
Day 2:
Day 3:
How I found …
21
votes
Accepted
Message from deep negative space
Let us
giving us the quote
8
votes
Accepted
The physicist's puzzle
You can find the solution to the nonogram in Anonymous' answer. For the rest
10
votes
Accepted
PSE Advent Calendar 2021 (Day 12): Christmas Confusion
I'm guessing your Christmas present will be
Zizy Archer has solved part 1 giving the order
Now, these gifts
So, now we should have enough information to deduce the arrangement!
11
votes
Accepted
Kind of like a clock, kind of like a path…
The final phrase is
Starting with the nonogram
6
votes
Accepted
A sudokey and 14 messages
Parts 1-3 were first solved by Alaiko
Part 1
Part 2
Part 3
Part 4
Part 5