Differential Privacy-Based Double Auction for Data Market in Blockchain-Enhanced Internet of Things
Table 1
Notation.
Symbol
Description
,
Sets of active buyers () and sellers () in slot
,
An active buyer () and seller () in slot
,
Sets of bids and asking prices
,
A bid and an asking price
,
The sets of data quality which are buyers’ requirements and sellers’ supply
,
Data quality, which is a buyer’s requirement and a seller’s supply
,
Sets of data quantity, which are buyers’ requirements and sellers’ supply
,
Data quantity, which is a buyer’s requirement and a seller’s supply
,
Sets of candidate buyers and sellers
,
Sets of winning buyers and sellers
Valid price for buyers (when ) and sellers (when ) at slot
,
Set of refined active buyers and sellers
A winning buyer
,
Trading price of winning buyer and winning seller
Data transaction result, including winning buyer , trading price of , data providers , and whether requirement is satisfied (“yes” if ), including winning sellers, trading prices, corresponding buyer, and amount of data provided
