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Mật mã Four-square (Vietnamese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Mật mã Four-square" in Vietnamese language version.

refsWebsite
Global rank Vietnamese rank
1books.google.com
3rd place
6th place

books.google.com

  • William Maxwell Bowers (1959). Digraphic substitution: the Playfair cipher, the four square cipher. American Cryptogram Association. tr. 25.