ISO/IEC 7811 defines the characteristics for identification cards as defined in Clause 4 of this part ofISO/IEC 7811 and the use of such cards for international interchange.This part of ISO/IEC 7811 specifies requirements for a high coercivity magnetic stripe (including any protective overlay) on an identification card, the encoding technique and coded character sets. It takes into consideration both human and machine aspects and states minimum requirements.Coercivity influences many of the quantities specified in this part of ISO/IEC 7811 but is not itself specified.The main characteristic of the high coercivity magnetic stripe is its improved resistance t