Differential Privacy-Based Double Auction for Data Market in Blockchain-Enhanced Internet of Things

Algorithm 1

Double Auction with Valid Price Mechanism.

Input: active buyers and sellers in slot , and their bids (price, quality, and quantity)

Output: Data transaction result

//Initialization

, , ,

whiledo

  ,

  //Call Algorithm 2 to calculate valid price

   in descending order,

   in ascending order,

  //Call Algorithm 3 (normal method) for data trading

end