Design a cheating-proof online carauction system using cryptographic hash function with the following requirements: A bidder can only bid with ahash value. The bidder can bid only once. Guessing the plaintext bid amount should be difficult.

. Covid-19 has changed the way we conduct business these days. This is true for car auctions as well. Currently, most of the car auctions are being operated online as physical auction is prohibited. Large number of sellers and car dealers are opting for online auctions. Based on an article published, we would like to highlight few facts about the current practice in online auctions: "Online car auctions run like a traditional auction, with buyers registering and placing bids while watching videos and online condition report of cars. Another method involves buyers sending off bids, similar to eBay, and the time allotted for the auction is extended by five minutes every time a bid is entered. Obviously, there are many issues with online auction, but one of the critical issues is trust the way online bidding process is conducted. We want to make sure the online bidding process is trustworthy, and nobody can cheat to win. Online Car Auction System Hash of Bid Amount h($5000) Hash of Bid Amount h($6000) Hash of Bid Amount h($4500) Hash of Bid Amount h($5200) Bidder 1 Bidder 4 Bidder 2 Bidder 3 Figure-3: Cryptographic Hash Function based Online Car Auction Design a cheating-proof online car auction system using cryptographic hash function with the following requirements: A bidder can only bid with a hash value. The bidder can bid only once. Guessing the plaintext bid amount should be difficult. Show step-by-step process with concrete examples