Tagged “ciphers”
18 pages · most loved first
0x00-8191
A daily puzzle site that broadcasts one transmission a day, from ciphers and signals to riddles and ARG-style extraction…
Braingle
A long-standing community archive of thousands of riddles, brain teasers, optical illusions, and codes, each rated by di…
Codes and Ciphers
A history site built by codebreaker Tony Sale, documenting the Enigma machine and the wartime cryptanalysis work at Blet…
commitmentocostumes.blogspot.com
Art & Design
Commitment to Costumes
Blog of costume historian Sara Rivers Cofield about antique clothing finds, including the mysterious coded note hidden i…
Cryptii
A modular, visual playground for chaining together classical ciphers and encodings step by step, making it easy to see e…
Crypto Museum
An extraordinarily detailed online museum documenting historic cipher machines, from the Enigma to Cold War spy radios a…
Cryptoclub
An educational outreach project teaching classical cipher-breaking through hands-on activities, letting visitors crack C…
CrypTool
An interactive cryptology learning site where you play with ciphers online, work through lessons, and solve puzzles to b…
dCode
A sprawling free library of hundreds of classical and modern cipher tools, letting curious visitors encode, decode, and…
Dimity Jones in Puzzle Castle
An electronic escape novel told through eighty-nine ciphertexts: follow Dimity Jones through a puzzle castle and crack e…
Elonka Dunin's List of Unsolved Codes
A meticulously maintained list of the world's most famous unsolved ciphers and codes, from the Voynich Manuscript to the…
Galactic Puzzle Hunt
An annual online puzzle hunt with a science-fiction theme, whose past years' full puzzle sets and solutions remain freel…
MysteryTwister C3
An international cryptography contest platform offering free cipher-cracking challenges at every skill level, from simpl…
NEPTUN
A small site cataloguing dozens of methods for solving the Rubik's cube and other sized puzzles, from beginner and CFOP…
quipqiup
A free cryptogram-solving playground that lets you decode substitution-cipher quotes yourself or watch an automatic solv…
Signals Puzzle Archive
An archive of narrative-driven puzzle hunts from The Mystery League, letting solvers work through past seasons of interl…
Spy Codes
A free booklet of simple ciphers and secret codes for kids to learn, with step-by-step examples for encoding and decodin…
The Silk Dress Cipher and the Orphan Train
Nick Pelling digs into the Silk Dress Cipher, a coded message found in a Victorian dress, as reader clues suggest it is…
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