How the language of maths keeps us secure in the modern world. Safety in Numbers Part of the series: Painting With Numbers Mathematician Marcus du Sautoy reveals how the language of maths is used to construct the complex codes that we encounter in everyday life. He meets Professor Keith Ball to discuss how these codes work, and how they help us with daily activities such as ordering books online and receiving pictures from satellites deep in space. Marcus explains how mathematical technique can keep our personal information secure when we use the internet.
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