The Scopus MIFARE DESFire ISO card is a white PVC laminated card compliant with the ISO/IEC 14443A standard. It is ideal for service providers wishing to use multi-application smart cards in transport schemes, e-government or identity applications. It fully meets the requirements for fast, highly secure data transmission, flexible memory organisation and interoperability with existing infrastructure. MIFARE DESFire EV1 is based on open global standards for interface and cryptographic methods. It complies with the 4 levels of ISO / IEC 14443A and uses optional ISO / IEC 7816-4 commands. Featuring an on-chip backup management system and three-pass mutual authentication, a MIFARE DESFire EV1 card can hold up to 28 different applications and 32 files per application. The size of each file is defined when it is created, making MIFARE DESFire EV1 a truly flexible and practical product. The most widely used version, however, is the EV2, before giving way to the EV3, which is in stock at SCOPUS.