| 摘要 |
The invention relates to a method for the secure transmission of encrypted information and for visualisation by a predefined recipient. A first grid (1) consisting of a first type of first grid elements and a second type of first grid elements is applied to a first medium. The first type and the second type of first grid elements modify at least one property of light passing through the grid and/or medium in different ways. A distribution of the first and second types of the first grid elements that defines a key is determined stochastically and in a ratio of approximately 50:50. A second grid (2) consisting of a first type of second grid elements and a second type of second grid elements is applied to a second medium, the second grid elements substantially having the same lateral dimensions as the first grid elements, and the first and second types of second grid elements when illuminated modifying at least one property of the light used for illumination in different ways. At least one coherent area (3), the contour of which defines an information item, is determined in the second grid (2). The first and second types of second grid elements are then distributed depending on the distribution of the first grid elements in the first grid (1) such that, when the two grids are oriented with respect to each other in a predefined manner, a first grid element of the second type corresponds to a second grid element of the first type and a first grid element of the first type corresponds to a second grid element of the second type outside the at least one coherent area (3), and a first grid element of the second type corresponds to a second grid element of the second type and a first grid element of the first type corresponds to a second grid element of the first type inside the at least one coherent area (3), or vice versa. The first grid (1) is made accessible to the recipient on a first transmission path and the second grid (2) is made accessible to the recipient on a second transmission path. At the recipient, the first and second grids (1, 2) are superimposed on each other in an oriented manner such that the information becomes visible owing to a perceptible difference between the at least one area (3) and the surroundings. |
