The purpose of the notification is to provide a security with a corner effect to the security document, the security document and the manner in which such security and security document are produced. A security having an angular effect to a protected document, comprising a base with a protruding structure formed by the attachment of at least two images, one of which is defined by at least one line arrangement extending in the first direction, the second of the images is defined by the arrangement of lines extending in the second and third directions creating a angular effect together, the first, second and third directions being different,is characterized by the fracture structure being determined by the angular effect resulting from one of the three logical operations on the first (P) image and the second (Q) image,where these operations are as follows: denial of implication, simultaneous denial, reversal of implication.
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