Synchronous Smart Card Protocol Sniffing

Now that we've figured out how they store credits on the card, we need to figure out how the reader writes to the card. To do this, we'll need to somehow sniff the connection and reverse engineer their protocol. The following section will show you how to make your own synchronous smart card protocol sniffer and give you code for sniffing the connection.

• Sniffer Design
• Sniffer Code