METHOD AND APPARATUS FOR VERIFYING THE AUTHENTICITY OF A PRODUCT AND AUTHORIZING PROCESSES USING THE MAGNETIC PROPERTIES OF A MARKER

摘要

P The invention relates to a method and an apparatus for verifying the authenticity of an article, the authentic articles being respectively provided with markers all having the same magnetic properties. The apparatus comprises a means (6) which produces a variable magnetic field (5), a receiving antenna (13) intercepting the field (5) in order to produce an electronic signal (22) and having loops connected so that, in the absence of a marker, the antenna signal is zero while, in the presence of a marker, a modified electronic signal is produced, a means (16) which analyzes the modified electronic signal in the time domain or in the frequency domain in order to obtain a parameter representing a unique property of the marker, the parameter thus obtained being supplied to a means (46) which compares it with values stored in a storage means so as to determine the authenticity or non- authenticity of the article considered. /P