Device of the chip or electronic system-in-package type, comprising at least one element for protecting at least part of at least one face of the device, said protective element comprising at least:



an attack detection element of the device comprising at least one GMI-effect electrically conductive material, and
a magnetic field emitter to which said GMI-effect electrically conductive material is to be subjected,
and wherein the GMI effect is to be achieved in said GMI-effect electrically conductive material when an exciting alternating electric current flows therethrough and when subjected to the magnetic field of the magnetic field emitter.