This dimension groups algorithms by the design technique they use, divide and conquer, dynamic programming or greedy choice. Wikipedia notes that "advanced algorithms may utilize loops and involve many conditionals that decide the next step based on the inputs provided," a structural choice that defines the technique behind the algorithm. Browsing by design technique keeps algorithms built the same way grouped together.
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1. Wikipedia: Cryptography
WikipediaCryptography, History section, earliest-use sentenceQuote, Cryptography, History section, earliest-use sentence
The earliest known use of cryptography is some carved ciphertext on stone in Egypt (c. 1900 BCE), but this may have been done for the amusement of literate observers rather than as a way of concealing information.
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