Controlled Delegation Protocol in Mobile RFID Networks
To achieve off-line delegation for mobile readers, the authors propose a delegation protocol for mobile RFID allowing its readers access to specific tags through back-end server. That is to say, reader-tag mutual authentication can be performed without readers being connected to back-end server. Readers are also allowed off-line access to tags' data. Compared with other delegation protocols, their scheme uniquely enables back-end server to limit each reader's reading times during delegation. Even in a multi-reader situation, their protocol can limit reading times and reading time periods for each of them and therefore makes back-end server's delegation more flexible.