| http://www.w3.org/ns/prov#value | - One of the earliest descriptions of text encryption by substitution appears in the Kama-sutra, a text written in the 4th century AD by the Brahmin scholar Vatsyayana, but based on manuscripts dating back to the 4th century BC. The Kama-sutra recommends that women should study 64 arts, including cooking, dressing, massage and the preparation of perfumes.
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