the invention relates to a method for producing tamper - proof identification elements , and to tamper - proof identification elements produced according to said method and consisting respectively of at least one layer reflecting electromagnetic waves , a spacer layer , and a layer consisting of metallic clusters . according to said method , a partial or all - over layer reflecting electromagnetic waves is applied to a carrier substrate , followed by at least one partial and / or all - over polymer layer having a defined thickness , and a layer consisting of metallic clusters which is produced by means of a method using vacuum technology or from systems based on solvents is then applied to said spacer layer .