Category:Uncracked codes and ciphers
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A list of unsolved problems that are, or are thought to be, codes or ciphers.
This category has only the following subcategory.
- ► Undeciphered writing systems (3 C, 25 P, 1 F)
The following 14 pages are in this category, out of 14 total. This list may not reflect recent changes (learn more).