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, 27 P)
Pages in category "Uncracked codes and ciphers"
The following 15 pages are in this category, out of 15 total. This list may not reflect recent changes (learn more).