The Internet of Things IoT is experiencing exponential growth in research and industry, but it
still suffers from privacy and security vulnerabilities. Conventional security and privacy …

There has been increasing interest in adopting BlockChain (BC), that underpins the crypto-
currency Bitcoin, in Internet of Things (IoT) for security and privacy. However, BCs are …

Blockchain technology has been transforming the financial industry and has created a new
crypto-economy in the last decade. The foundational concepts such as decentralized trust …

Blockchain is a distributed ledger technology that became popular as the foundational block
of the Bitcoin cryptocurrency. Over the past few years it has seen a rapid growth, both in …

Blockchains are distributed systems, in which security is a critical factor for their success.
However, despite their increasing popularity and adoption, there is a lack of standardized …

The Internet of Things (IoT) aims at connecting things to the Internet in a peer-to-peer
paradigm for data collecting and data sharing in our daily life. A blockchain is an immutable …

Abstract The Internet of Things (IoTs) enables coupling of digital and physical objects using
worthy communication technologies and introduces a future vision where computing …

The emergence of Internet-of-Things (IoT) has attracted a massive response from different
stakeholders including industry, academia and research community due to the wide range of …

Blockchain, the underlying technology of cryptocurrency networks like Bitcoin, can prove to
be essential towards realizing the vision of a decentralized, secure, and open Internet of …

This paper presents a comprehensive survey of the existing blockchain protocols for the
Internet of Things (IoT) networks. We start by describing the blockchains and summarizing …