According to one embodiment, evaluation map creating method is disclosed. The audio jack can include a series of pogo pins operative to extend into an audio jack cavity to provide conductive contacts for an audio plug placed within the audio jack. Two of the three legs are in a same plane, and each have one 3-DOF spherical joint and two 1-DOF joints. Each group of devices has the name of the group associated with the certificate and signed by the CA.