Equipped with a chip, the plastic card has become an electronic key. The application possibilities of chip cards are virtually unlimited.
In contrast to the use of cards with bar code, chip cards can store data on the card.
For this purpose, in contrast to magnetic stripe cards, the secure storage of the data is guaranteed by pincode and data encryption. The chips are differentiated in memory and processor chips. The cheaper memory cards are divided in three subgroups:
1) simple I²C bus memory (without security logic)
2) Security Memories (with simple security logic)
3) authenticated security memories (with counter logic)
The data required for the application are stored in the EEPROM. The security logic controls access to the memory. In the simplest case, it only protects the memory from writing and deleting. Memory chips with more complex security logic can also perform simple encryption.
If the highest security requirements are to be ensured, the much more expensive microcontroller chip is used. This chip is something like a small computer with a lot of security features.
Micro controller chips are divided by:
ROM (Read Only Memory)
RAM (Random Access Memory)
EEPROM (Electrically Erasable Programmable ROM)
Our company manufactures the cards, implants the desired chip and encodes them according to customer requirements. Card Service AG also supplies the components for reading and encoding the cards on site.
Some of the mostly used chips are listed below: