Tabula recta
Fundamental tool in cryptography / From Wikipedia, the free encyclopedia
In cryptography, the tabula recta (from Latin tabula rēcta) is a square table of alphabets, each row of which is made by shifting the previous one to the left. The term was invented by the German author and monk Johannes Trithemius[1] in 1508, and used in his Trithemius cipher.
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