Unit 3

Unit III: IoT Protocols and Security Issues

IoT Standardization

  • Unified Data Standards Protocols

    • Total interoperability needed among different systems.

  • Examples of IoT protocols include:

    • IEEE 802.15.4

    • BACNet Protocol

    • Modbus

    • KNX

    • Zigbee

Issues with IoT Standardization

  • Positive and Negative Aspects:

    • Critical for market development but could inhibit innovation.

    • Standardization and innovation may contradict each other.

  • Scope and Organization:

    • Different organizations focus on limited scopes (e.g., 3GPP for cellular networks).

    • Competing standards exist without adequate communication.

  • Decentralization Challenges:

    • Extremely decentralized activities across heterogeneous standards-setting bodies.

    • Need for stakeholder participation and voicing requirements.

Unified Data Standards

  • Overview:

    • Aim to define a unified data representation and protocol for IoT.

    • Foundation of the internet changed from document-based to object-based with HTML/HTTP.

    • Need to transition IoT into the Web of Things (WoT).

  • Questions Raised:

    • Is a new standard needed, or should existing formats be extended?

    • Adaptation for browser interfaces tailored for machines and IoT data.

Protocols Overview

  • IEEE 802.15.4:

    • Defines low-rate wireless personal area networks (LR-WPANs).

    • Establishes a 10m communication range, with a 250 kbit/s transfer rate.

  • BACNet Protocol:

    • Communication protocol for building automation and control.

    • Supports various applications like HVAC, lighting, and access control.

  • Modbus:

    • Serial communication protocol for connecting industrial electronic devices.

    • Openly published, widely used, and easy to deploy.

  • Zigbee:

    • Communication for wireless PAN, developed for low-power devices.

    • Emphasis on applications like home automation and medical monitoring.

IoT Security Issues

  • Fundamental Security Challenges:

    • New security concerns due to scale and technology connections.

    • Key focus areas: Authentication, addressing, embedded security.

  • Vulnerabilities:

    • DDoS attacks, unauthorized access, information corruption, etc.

    • Need for structured security requirements to address these threats.

Security Requirements

  • Key Elements:

    • Access control, authentication, data confidentiality, scalability, flexibility, and adaptability.

    • Non-repudiation, ensuring the integrity and availability of data and resources.

  • Framework of Security Architecture:

    • Incorporates privacy considerations for users and owners in IoT systems.

    • Threat modeling to identify critical assets and potential misuse cases in IoT.