MIFARE mifare ultralight DESFire EV1 is ideal for solution developers and providers wanting to combine   and support multiple applications on one contactless smart card. It fully complies with   the requirements for fast and secure data transmission, flexible memory organization, and   interoperability with existing infrastructure.
MIFARE DESFire EV1 is based on open global standards for both air interfaces and cryptographic methods. It is compliant to all four levels of ISO / IEC 14443 A and uses optional
ISO / IEC 7816-4 commands.
Featuring an on-chip backup management system and the mutual three pass authentication, a MIFARE DESFire EV1 card can hold up to 28 different applications and 32 files per application. The size and access conditions of each file are defined at the moment of its creation, making
MIFARE DESFire EV1 a truly flexible and convenient product. Additionally, an automatic anti-tear mechanism is available for all file types, which guarantees transaction oriented data integrity. With MIFARE DESFire EV1, data transfer rates up to 848 Kbit/s can be achieved, making fast data processing possible. The chip’s main characteristics are denoted by its name DESFire EV1, the first evolution of MIFARE DESFire: DES indicates the commitment for high levels of security -
Key applications 
>Advanced public transportation 
>Access management 
>E-Government incl. social services 
>Closed loop micro-payment 
>Loyalty programs  Key features 
>Fully ISO / IEC 14443 A 1-4 compliant  
>2/4/8-Kbyte EEPROM with fast programming  
>Secure, high-speed command set  
>High data rates according to ISO / IEC 14443-4: up to 848 Kbit/s  
>Flexible file structure  
>Choice of open DES/2K3DES/3K3DES/AES crypto algorithm in hardware 
>Anti-collision  
>Privacy protection 
>Unique 7-byte serial number (ISO cascade level 2)  
>Data integrity: CRC and bit counting on physical layer  
>Available in MOA4 modules or 8” sawn bumped wafer  
>Common Criteria certification: EAL4+ for IC HW and SW

Proximity chip card cards are just access control smart cards that offer its users the twin advantage of logical access control in addition to physical access control. These credit cards have immense use to enterprises, while they provide option of computers, networks and finally resources in the organization. Thus, proximity cards can assist you gain access to restricted area and computer system. These proximity cards have largely reduced the entire security expense of organization. Along with it, these prox cards may also be used for varied other purposes such as email encryption, web authorization, digital signatures and others.