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Any code comprising digits 1 to 6 can be encoded with the 7 Unicode symbols representing dice (one side of a 6-sided cubic dice).

1

⚀

2

⚁

3

⚂

4

⚃

5

⚄

6

⚅

?

🎲

Example:421 is written ⚃⚁⚀

To be sure that only the digits 1 to 6 are used, writing in base 6 (or less, base 5 or base 4 ...) is practical as is a grid encryption of size 5 or 6 (Polybius square, ADFGVX cipher etc.)

How to decrypt a message with dice?

The first step is to replace each die with its value

⚀

1

⚁

2

⚂

3

⚃

4

⚄

5

⚅

6

🎲

?

It is then likely that the message will use a second encryption method to decode the digits / numbers found.

How to recognize a dice ciphertext?

Basically the message is made up of dice, the Unicode symbols U + 2680 to U + 2685 or the Emoji U + 1F3B2 🎲

Any reference to the number 6, to dice games (Craps, 421, Yams, Yahtzee) are clues

Source code

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