What is Internet of Things (IoT)

The Internet of Things (IoT) refers to the vast and growing network of physical devices from industrial sensors and smart home appliances to medical equipment, vehicles, and supply chain trackers embedded with sensors, software, and connectivity that enables them to collect and exchange data over the internet without human intervention.

THE SCALE OF IOT

By 2025, an estimated 75 billion IoT devices are connected globally from your smartwatch and home thermostat to temperature sensors in pharmaceutical cold chains, GPS trackers on shipping containers, and vibration monitors on industrial machinery. Each of these devices generates continuous streams of data that must be collected, transmitted, stored, and acted upon.

WHY IOT NEEDS BLOCKCHAIN

Traditional IoT architectures route all device data through centralised cloud servers (AWS, Azure, Google Cloud).

This creates critical problems that blockchain addresses: Single Point of Failure: If the central server goes down, the entire IoT network may fail.
Security Vulnerabilities: Centralised databases are prime targets for hacking a single breach compromises all device data.
Data Integrity: Who verifies that sensor data has not been altered?

Blockchain creates an immutable audit trail.

Scalability: Routing billions of device interactions through central servers creates bottlenecks.
M2M Payments: IoT devices need to autonomously pay for services toll fees, energy consumption, data purchases requiring machine-to-machine micropayment infrastructure that traditional banking cannot provide.

BLOCKCHAIN-IOT INTEGRATION MODELS

Decentralised Device Identity: Each IoT device has a unique on-chain identity with cryptographically signed data transmissions proving data originated from a specific authenticated device.
Immutable Data Recording: Critical IoT data (pharmaceutical temperature records, food safety logs, industrial maintenance events) recorded on blockchain cannot be retroactively altered enabling regulatory compliance and dispute resolution.

Smart Contract Automation: IoT sensor readings trigger smart contracts autonomously a temperature sensor detecting cold chain breach automatically triggers an insurance claim or supply chain alert.
M2M Micropayments: IOTA's feeless tangle architecture and Helium's HNT token are specifically designed for IoT device payment channels.

KEY CRYPTO PROJECTS IN IOT

IOTA: Designed specifically for IoT uses a Directed Acyclic Graph (Tangle) rather than traditional blockchain, enabling feeless microtransactions between devices.

Helium (HNT): Decentralised wireless network for IoT devices.
VeChain (VET): Supply chain IoT tracking with blockchain verification.
Fetch.ai: Autonomous AI agents for IoT data markets.

Terms in addition to the Internet of Things (IoT)

Blockchain

A blockchain is a subset of a distributed database. The Bitcoin inventors originally prototyped the system in 2008. This modern database is made up of separate blocks that are connected together in a chronological chain. Blockchains may be used to store a wide range of data types. It has mostly been utilized as a public ledger for bitcoin transactions to date. A peer-to-peer network comprised of independent nodes uses a consensus process to ensure the blockchain's security and legitimacy. Each node in the network keeps a public and immutable copy of the data.

2 Factor Authentication (2FA)

2 Factor Authentication is a security measure with two layers. It is used by the majority of cryptocurrency exchanges. To log in, you must provide not only a password, but also a code obtained, for example, from the Google authenticator.

Airdrop

An airdrop is a method of distributing coins. End users can typically obtain coins for free or in exchange for doing a small task, such as subscribing to a newsletter, sending a tweet, or inviting others via a personal affiliate link. Cryptocurrency airdrops — the act of depositing cryptocurrency into public crypto wallets — are utilized as a marketing, liquidity creation, and network bootstrapping technique for many different types of blockchain initiatives.

Altcoin

Altcoin - "alternative coin" - is any kind of digital currency other than Bitcoin. Since the launch of Bitcoin, the world's first digital currency, many altcoins (as well as supporting blockchains) have been created. Altcoin digital currencies share many similarities to Bitcoin, but consistently and have significant differences. There are about 20,000 altcoins, and this number is expected to grow significantly in the coming years. Altcoins often develop Bitcoin features. Ethereum, currently the most widely used blockchain, supports digital contracts and separate applications where Bitcoin does not. Altcoins are also often created to cater to the needs of different users. The Litecoin blockchain, for example, can process payments quarterly for the duration of Bitcoin.

Cold Storage

Cold storage is the way to store cryptocurrency offline. The word refers to the use of offline wallets that are not connected to the internet. Cold storage is the most secure way to keep cryptocurrencies since an offline currency becomes less likely to be hacked and stolen. Paper wallets, printed renditions of private keys, and offline hardware and software wallets are all examples of cold storage.