How SDA and DDA works in Java Card

[Rivan]

The smart card - in fact, a credit card with a chip - has thirty years. But today , the emphasis on security leads companies and governments to look with new eyes at some old ideas. Smart cards are an attractive alternative to the weak link of authentication systems : passwords . The industry is hungry for technology replacing passwords . Via an embedded cryptographic processor , smart cards provide a highly secure authentication mechanism and very easy to use. I want to know that how SDA and DDA works in Java Card ?

[MindSpace]

The resource manager model is used because the smart card is a shared resource and multiple applications may try to contact the card at any time . Communication with the card must be serialized. Therefore, a simplified model of lock , so database is used by the resource manager. In the PC / SC, Maintaining the security of a smart card reader given (also known as Interface or DFI ) is called maintenance of the transaction. In this context, the term " transaction " , however, lends to confusion.

[Zecho]

Another description of the PC / SC is in the documentation of the platform SDK and concerns SCard Establish Context , SCard Begin Transaction , and other functions Win SCard . A host application uses these routines to establish a connection to the Resource Manager , obtain an exclusive lock on a smart card reader , send a sequence of commands to the card and unlock.

[opaper]

The use of switched network for the last link to the desktop units clearly complicates the task for PC users to malicious or nosy seeking a port on the network of unauthorized information. The switches in effect sending any packets that appropriate output port , the curious connected to another port will not receive any unauthorized information . If the server and the cabin wiring systems are safe , the last section and switched desktop unit plugged directly into the wall outlet , it is virtually impossible to intercept communications between the server and the desktop unit .

[Reegan]

You need to use third robber open systems . NET , in turn , can be read as a kind of " return " Microsoft in the field of smart card , after the failure of Windows rather bitter for Smart Card sanctioned by the cessation of developments by the Redmond giant ( but with the same source code by Sagem and the American Smart Card Integrators Inc. ) . Originally developed by the young California company Hive -Minded ,. NET for Smart Card , called Nectar, is indeed an operating system derived from the technologie.NET initiated by Microsoft , specifically tailored to smart cards . The OS offers a number of key benefits compared to JavaCard.

[absolute55]

The AC or stuck is that if your code is available on the net, you lose points in terms of security since it is easier for a cracker to climb a nasty attack on your card. It is even likely prohibitive. However , you 'll probably win a few points in terms of validation , since your card is probably more reliable.JavaCard is an implementation of Java for smart card . This is something totally stupid , it is to run a midlet on a 8-bit micro controller with between 500 and 5000 bytes of RAM . Knowing that consume much RAM jvm.