A Blockchain-Based Secure Radio Frequency Identification Ownership Transfer Protocol

Table 6

Change ownership function.

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ChangeOwnership (uint tid, address receiver, uint challenge)

public {

   require amount≤owner_weights[msg.sender]);

   if (tid = = TagID && Hash(challenge) = = seed)

   {

     owner = receiver;

     Old_Seed = Seed;

     Seed = Hash(challenge);

     emit Transfer (msg.sender, receiver, TagID, seed);

   }

   else

     revert (“Failed”);

}

event Transfer (address from, address to, uint tid,

bytes32 seed);

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