SmartCard technology and dreams for the future SmartCard technology, whether in the form of credit cards, ATMs or GSM mobile phone cards , is currently no longer only the monopoly of residents of big cities, but has also spread to small towns and even villages. The growth of this card, both in terms of the number of users and the technology itself, is really accelerating very quickly. One of the most widely implemented technologies in different types of cards is SmartCard technology. When we talk about SmartCards, we are of course talking about a small chip that has been programmed to handle certain functions or to store the information embedded in your card. Generally speaking, there are three models of smart cards developed in the industry around the world today, namely: 1. PC/SC: Developed by Microsoft and several other companies. PC/SC is a smart card application interface for communicating with smart cards in Win32.2 based PCs. OpenCard Framework: is an open standard that enables operations between smart card applications via NC, POS, desktop, laptop, set-top box, etc. OpenCard should generally be used in communication with external devices and/or using existing libraries on the client. Apart from this, OpenCard also provides an interface to PC/SC so that it can be used for Win32.3 based devices. JavaCard: First introduced by Schlumberger and used today as the standard card for Java software. Schlumberger also uses only Java cards as the only cards it currently sells, and is also the first company to have a JavaCard license compliant with ISO 7816. SmartCards are different from magnetic cards which are also very widely used in time card applications in offices. and so on, but has several advantages in terms of reliability, ability to store hundreds of times more information and is more difficult to tamper with. Smart cards are quite simple to program, which allows for further development on the application side. However, hardware technology itself does not evolve rapidly and tends to be static. Figure 1. Standard sizes and SmartCard components The standard size of a SmartCard is determined by the ISO7816 standard. If you look closely when purchasing a new GSM card, you will see that you can observe two components, namely the smart card itself and the plastic substrate that protects the smart card from damage before use. You can see the physical characteristics of smart cards based on ISO 7816 in several applications such as credit cards, ATM cards, etc. as in Figure 2. Figure 2. Physical characteristics of a smart card Normally, a smart card does not have a power supply, a screen or a keyboard..