= SSS (cipher)
{wiki=SSS_(cipher)}
SSS (also known as the "SSS cipher" or "Schlüssel zur Selbstschutz" cipher) is a type of polygraphic substitution cipher that was used in various contexts, particularly in World War II for military communications. It is a simple substitution cipher designed to obscure the text by replacing characters with others based on a fixed system or key. In the SSS cipher, pairs of letters in the plaintext are replaced according to a predetermined substitution rate.
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