Blockchain and PUF-Based Secure Transaction Procedure for Bitcoin

Abstract

In the blockchain, the transaction hashes are implemented through public-key cryptography and hash functions. Hence, there is a possibility for the two users to choose the same private key knowingly or unknowingly. Even the intruders can follow the particular user's bitcoin transaction, and they can masquerade as that user by generating the private and public key pairs of him. If it happens, the user may lose his transaction. Generally, bitcoin technology uses random numbers from 1 to 2256. It is a wide range, but for a greater number of users, there should be one another solution. There is a possibility of digital prototyping which leads to the loss of more accounts. This chapter provides the device-specific fingerprint technology known as physical unclonable function (PUF) to be employed for authentication in a blockchain-based bitcoin environment. The random unique response from PUF ensures correct transaction. In this chapter, a new tetrahedral oscillator PUF has been introduced intrinsically. All the blockchain operations are carried out and verified with PUF response.