Jürgen Mayer H. (*1965 in Stuttgart) combines architecture, product and graphic design, and art in his work. Numbers and dates encrypted into patterns are recurring elements in his architecture, drawings, and objects. He is particularly interested in the data protection and preprinted carbonless forms used by banks to encrypt pass codes or PINs in letters to customers. Data protection patterns guarantee that no one but the recipient can see the information. His research led Mayer H. to the oldest sources of these forms, which date back to 1913, and over the years he has amassed a collection of around four hundred different patterns. This large-format size publication features one hundred different preprints, which form the basis for many of his buildings, drawings, sculptures, and design objects.