THE DAILY CYPHER / KYBER CYPHER

Day — Streak 0 Solved 0/28

This puzzle needs JavaScript

All 28 puzzles ship inside this page, your browser picks the day's one by UTC date, and your answer is checked by hashing it here on your own machine. None of that happens with scripting turned off, so there is nothing to solve on this page right now. No server is involved either way: nothing you type ever leaves the page.

The rotation runs seven ciphers on a weekly curve: Caesar shift, Atbash, base64, hexadecimal, keyword substitution, Vigenere and rail fence. Every plaintext is a real lesson from that week's threat research, and the page explains the attack on each cipher rather than only grading the answer.

The field guides need no scripting at all. Read the guides index.

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The day's ciphertext is selected by your browser and appears here.

Decoded

Why it was today's message

Letter frequency

Shift explorer

Every one of the 25 possible Caesar shifts, applied to today's ciphertext. Read down the list until English appears. This is the whole attack on a shift cipher, which is why nobody uses one.

Byte decoder

Paste base64 or hex. No key required, which is the point: an encoding is a costume, not a lock.