Bluetooth is a short-range wireless technology primarily used for connecting devices directly to each other without cables. In allows devices like phones, tablets, and laptops to exchange data with nearby accessories like wireless headphones, keyboards, speakers, wearable tech and even cars.
Unlike cellular or Wi-Fi networks designed to communicate over longer distances (Wide Area Networks (WANs), Bluetooth is designed for personal area networks (PANs), small, local bubbles of connectivity usually within around 30 feet.
The Bluetooth protocol (set of rules) was purposely designed with features like lower power consumption, simple but secure pairing capability and direct communication to enhance the user experience.

Designed for even smaller range network communication, NFC (Near Field Communication) is used for tasks that require secure, close-range data exchange, typically within a few inches. This technology is commonly found in mobile payments (like Apple Pay and Google Pay), contactless access cards, and ticketing systems. NFC enables quick, secure interactions without the need for pairing or complex setups, simply by bringing two devices close together in proximity.

Zigbee is a low-power, short-range wireless communication protocol designed for small data transmissions between devices in a local area network (LAN). It is particularly well-suited for Internet of Things (IoT) applications, such as home automation, smart lighting, security systems, and environmental monitoring. Zigbee operates in the 2.4 GHz frequency band and is known for its low energy consumption, making it ideal for devices that need to run on batteries for
extended periods.

Blockchain is a decentralized and distributed digital ledger that securely records transactions in such a way that the registered transactions cannot be altered retroactively (immutable), making it resistant to fraud. It records transactions in ‘blocks’ and each block is cryptographically tethered to the next block creating a chain of blocks. This state-of-the-art technology rose to fame as the underpinning of the cryoptocurrency Bitcoin.
Since a block can’t be modified after it is written, the only trust needed is at the point where a user or program enters data. This peer-to-peer architecture eliminates the need for trusted third parties and is a major reason Bitcoin became so popular as it can be exchanged without anyone knowing other than the sender and receiver. The ‘distributed’ nature of the technology is also another important factor. Anyone who interacts with the blockchain can download a full copy of all historical transactions, making it virtually impossible to fraudulently manipulate it.
The decentralized architecture means copies of the blockchain database is stored in multiple locations which eliminates the concern that it be lost or deleted.
