Method for coding a security thread, especially for security paper.

摘要

The invention relates to a method of coding a security wire (F) for currency paper or the like, characterised in that it consists in applying to the wire a coding of a plurality of elementary information items constituted respectively by a plurality of segments having substantially the same length (L), the information in each segment being determined by the cyclic ratio of the length of an active or activatable area (for example magnetic or magnetisable) of the segment to the length of the said segment. Application to authentication. <IMAGE>