Industrial revolutions describe transitional periods that welcome new manufacturing procedures. The first three industrial revolutions can be described as mechanization to improve manufacturing process, introduction of electricity into manufacturing, and the digital revolution within the manufacturing process respectively.
These revolutions have evolved business practices in their respective times. The ever-changing technological landscape of our current time has given rise to impactful technologies that have edged us closer to the fourth industrial revolution. These technologies include the Internet of Things, Big Data Analytics, and Cyber-Physical Systems.
The fourth revolution, like its predecessors, is evolving business practices in the manufacturing industry. New business models and services are emerging. The nature of manufacturing products has changed. Manufacturing systems are becoming not only fully autonomous but also ever-increasingly intelligent.
Supply chains are becoming more flexible. Products are more flexible and precise as per consumer requirements. However, the cybersecurity challenges associated with the fourth industrial revolution has never been greater.
For example, breaches may lead to a lower quality or quantity of production. Brand reputation may be impacted. Environmental and equipment damage may happen. Hefty financial and legal consequences may arise. Trade secrets may be lost through breaches. With all this said, Industry 4.0 cybersecurity cannot be ignored.
Industry 4.0 was a concept of German origin via a government initiative. Dubbed as the fourth industrial revolution, it was first introduced as Industry 4.0 in 2011. The general goal was to improve competitiveness of the manufacturing industry. It was also to advance the new generation of smart manufacturing systems.
But what does it do differently from the previous industrial revolution? Let us briefly glance at the third industrial revolution, which was known as the digital revolution. Computerization was the key aim of this period in industrial history since digital systems replaced mechanical and analog ones. This naturally came after the electrification of the manufacturing floor. The use of computer systems in the manufacturing industry started with recordkeeping systems as well as accounting systems.
The digital revolution, also known as the information age is dated between 1950 and 1970 and it has to be appreciated as it was a result of strides in computers and communication technology and has arguably advanced to include automation and communications since the 1970s. However, there have been no disruptive leaps forward on an industrial level since then. Rather, progress has been at the consumer level, with the ubiquity of mobile devices and emergence of e-commerce.
With this brief introduction to the third industrial revolution which attained automation using computer systems, comparing Industry 4.0 to the third industrial revolution we can distinguish that in the fourth (and current) industrial revolution, the focus will be on connectivity and interconnection, information transparency, and decentralization among others.
Therefore, Industry 4.0 as an initiative can be described as a new paradigm that uses various technologies to create production systems of the future. This system is meant to be automated, integrated, flexible and highly customizable.
We refer to these technologies as enabling technologies. They include; the Internet of Things (IoT), Cyber-Physical Systems, Smart Factories, and the Cloud. We can also argue that interoperability is a key enabler of Industry 4.0 since these technologies collaborate and are integrated. There are more enabling technologies but we shall only delve into these four.
Industry 4.0 Enabling Technologies
Internet of Things (IoT)
The Internet of Things (IoT) refers to a network of interconnected objects. These objects are physical devices and are billions in number globally. From the term IoT, there are two parts; the internet and things. The connection is through the internet. Things refer to the billions of physical devices. This interconnection via the internet allows for a cooperation and interaction in collecting, sharing, and exchanging of data. Due to cheap processors and wireless networks, it is easy to convert a physical object into part of the Internet of Things. Devices may be cars, sensors, buildings, machines, and so forth.
The Internet of Things can be divided into Consumer IoT and Industrial IoT(IIoT). Consumer IoT defines smart connected product systems targeting an individual consumer. IIoT is centered around machine connectivity with an aim to not only improve asset performance and product quality but also step up accountability throughout the systems.
The overall expectation from IoT is to facilitate advanced connectivity of things, services and systems that surpasses machine-to-machine (M2M) communications and other legacy technologies of a similar purpose.
In the landscape of Industry 4.0 the Internet of Things is expected to encompass a variety of protocols and applications. The economic impact anticipated from IoT in manufacturing is in the trillions of dollars.
Nonetheless, the advancement in the connectivity of things, services and systems in the Internet of Things creates new loopholes and challenges in terms of security. The straightforward connectivity to the internet as well as easy conversion of everyday objects to (connected) things shows that IoT is highly scalable in nature. This scalability means IoT requires very versatile infrastructure to combat security threats.
Since IoT depends on the internet as its backbone it is safe to deduce that the inherent security matters plaguing the internet shall prevail in IoT. As a result, a number of security challenges can manifest in IoT. These include authentication, access control, trust, confidentiality, non-repudiation, privacy, secure middleware. Yet, the Internet of Things can be interpreted as the technical infrastructure (an important part) towards the accomplishment and attainment of Cyber-Physical Systems.
Cyber-physical systems are simply a new generation of integrations of physical processes with computation and networking processes. This is integrating cyberspace with the physical world. Cyberspace refers to the widespread interconnected digital technology characterized by communication and computing infrastructure.
Cyber-Physical Systems have numerous applications in the following sectors; manufacturing, energy, infrastructure, consumer, communication, military, robotics, smart buildings, healthcare, infrastructure, and transportation among others.
Noteworthy applications include autonomous driving and smart grid. Communications in these systems take place through the internet. This would mean that connectivity is provided over standard protocols, namely Internet Protocol and Transmission Control Protocol. These protocols possess notorious vulnerabilities. An example is the Man-in-the-Middle attack. For more detailed information on Man-in-the-middle attacks, you can read this related article.
It is common to find these protocols in use in these systems without any additional protection against the aforementioned vulnerabilities. Coupled with additional security challenges, Cyber-Physical Systems are challenged in upholding the fundamental principles of information security (Confidentiality, Integrity, and Availability)
Regardless, thanks to the implementation of IoT technologies, Cyber-Physical Systems effortlessly map the virtual world to physical systems. This, for instance, helps create Smart Factories as a result of integration of the digital and real worlds.
Smart Factory describes an environment where equipment and machinery have the ability to enhance manufacturing processes. It is a critical step towards Industry 4.0. The enhancement may be achieved via self-optimization as well as automation. Nonetheless, this is not only focused on the manufacturing and production process, but also improves various stages of the supply chain.
A smart factory can generally constitute a number of technologies of production, information, and communication. The key offering is the potential to be integrated across the whole manufacturing supply chain. The Internet of Things is key for connectivity of these distinct sections of production though it is worth noting that it is not the only means of connectivity that may be applied.
As a result, suppliers, vendors, and customers are more and more integrated into the production infrastructure. This creates complex information technology-dependent smart factory networks between companies.
Major benefits include increased efficiency and flexibility of production of personalized goods. Flexibility would involve allowing manufacturers to make last minute changes in various stages of production, as well as producing unique, user defined or one-off products. The decision making and transparency of the manufacturing process is optimized. Effectiveness of manufacturing and production is also greatly increased.
Big Data Analytics
IIoT systems produce massive amounts of data. The data is produced by smart sensor networks, devices, and log files etcetera in manufacturing systems. Hence, with such different and diverse sources of data, it is expected that the data may be greatly diversified and will be either structured or unstructured or both.
Big data is characterized by volume, veracity, velocity, variety, validity and volatility. These manufacturing systems therefore generate a high volume of data, high variety and high veracity as well thanks to the collaboration with the Internet of Things and Cyber-Physical Systems.
Big data analytics gets massive amounts of data from factories, suppliers, product designers, clients, and customers. Although big data provides unrivalled value in advancing Industry 4.0 as well as other emerging technologies, its distributed structure also yields a number of challenges. Most notably the security of data, privacy, and access control as well as data storage.
Industry 4.0 vs Industrial Internet of Things
Industry 4.0 is often used almost synonymously with Industrial Internet of Things (IIoT). They are similar in principle since both work towards a connected industrial world. Though it is worth mentioning that they are different. IIoT covers a broader spectrum in an industrial sense and is concerned with connection of assets. On the other hand, Industry 4.0 is not only concerned with connection of assets but also the complete value chain digitization. Industry 4.0 is mainly centered on the manufacturing sector and is more often than not characterized as initiatives by either the government or institutions.
An asset is any data, device, or any environmental component that supports information related activities. Assets such as servers, critical software, switches, and top-secret information should be protected.
A study conducted determined the most important Industry 4.0 cybersecurity assets to be Industrial Control Systems (ICS), IIoT gateways, followed by sensors, and actuators.
Benefits and Potential of Industry 4.0
New Business Models
Industry 4.0 is introducing new models of operation for enterprises. An example in smart manufacturing is the Factory-as-a-Service (FaaS) business model. It allows service providers to present their clients with virtual factories.
FaaS is the product of Cyber-Physical Systems. These Cyber-Physical Systems can credit their development to the widespread use of sensor technology. The offering of FaaS allows the client to choose multiple service providers for various stages of manufacturing (as well as specialist manufacturing) thanks to the interconnection and distributed nature of these factories. The factories may likely be in various geographic areas.
Maximizing asset utilization. Since these systems are interconnected and integrated, production is made to be more seamless. It becomes a single end to end process as opposed to a fragmented combination of processes. This eliminates overlap in roles through the system. Machine downtime is also minimized via remote monitoring and predicative maintenance which involves the use of data analytics to anticipate system downtime.
Labor productivity, efficiency and flexibility. Man is more likely to make an error. These systems improve the efficiency of the production process by minimizing human error. This also reduces the pressure on personnel to carry out complex, tiresome, or potentially dangerous tasks that could be automated. Human labor is freed to fill up new and more effective roles that may improve employee fulfilment.
Collaborative operations and sharing across the system is made possible. As a result, overhead is lowered and profitability is increased. These breed the right conditions for greater innovation and creativity, which also translates to an improved customer experience.
Quality of services and products. A FaaS business model, for example, offers clients the highest level of flexibility in the creation of their desired products. Production of various products is very deliberate and is backed by data (market data, product data, customer data etc.) therefore leading to reduced inventory levels and more sales. Real time data analysis is leveraged to ensure improved quality all round.
Industry 4.0 Cybersecurity Challenges and Implications
Why should you care about Industry 4.0 Cybersecurity?
Before the advent of Industry 4.0, the goal of cybersecurity involved defending organizational parameters. It’s very commonly involved in protecting a private computer network. The methods used to prevent breaches include the use of firewalls, anti-malware software, intrusion detection systems among others. Even so, this approach to cybersecurity is becoming more obsolete by the day especially in an industrial context. Industry 4.0 aims to blur the boundaries between the digital and the physical worlds.
From the perspective of a practitioner (a manager, engineer, cybersecurity expert) in an evolving manufacturing industry, it is worth noting that the integrated and distributed nature of Industry 4.0 makes it impossible to completely secure a business from cyber-threats due to a number of reasons:
Data sharing. With Industry 4.0, sharing of data and intellectual property is done across supply chains and various stakeholders. Systems are being integrated between consumers and suppliers. Data is distributed all through the systems, which means a greater security scope.
Points of attack. Since these systems involve a number of stakeholders in the value chain as well as consumers, the number of user access points drastically increases. These access points are possible points of attack. The more points of attack to cover, the harder (and more expensive) it becomes to secure the whole system.
Convergence of Information Technology and Operational Technology. Software and hardware boundaries are blurred. To secure these Industry 4.0 systems from end to end, it is important to consider the digital components as well as the physical ones. The methods previously used such as anti-malware, intrusion detection systems, and firewalls may fall short of the mark when involving software and different types of hardware systems.
Playing catch-up. Even prior to Industry 4.0, cybersecurity threats tended to be one step ahead of potential solutions or preventive measures. It is common to set up preventive measures in a private network such as firewalls and intrusion detection systems that react to new threats that bypass such measures. However, with Industry 4.0, given the systems cut across industries and have possibly thousands of different devices and networks interacting with each other, the types of threats to anticipate increase. The possibility of new threats increases exponentially. For example, emerging threats may target a specific device among thousands in a network. This is incredibly difficult to anticipate.
Financial Cost and Damage
Due to the prevalence of cyber threats in Industrial Control Systems, proactive cybersecurity actions are taken by stakeholders and enterprises across the supply chain. This means that cybersecurity has increased priority among various industries, particularly those implementing Industry 4.0.
There is a financial cost attached to this prioritization and proactive implementation. Risk assessment, identifying of the ever changing and growing threat landscape, as well as placement of measures to prevent and mitigate is increasingly costly to enterprises. Especially considering a proactive approach, where threats might not exactly translate into a reality.
Alternatively, a reactive approach may be more costly since critical information may be compromised, corrupted, or ultimately destroyed. For example, consider a ransomware attack, where enterprises and users are at the mercy of attackers. Attacks on Cyber-Physical Systems may lead to the physical damage of critical equipment.
Personnel may end up getting hurt through machine malfunction failures or explosions. The physical environment around these systems may be impacted, for example in the case of a fire. Tarnished reputations may lead to reduction of profits and lawsuits may result out of these type of attacks on the grounds of failure to protect data or recover from breaches. Furthermore, incident response may be expensive depending on urgency and severity of the attack.
The financial aspect of preventing, mitigating, and responding to attacks cannot be ignored in today’s Industry 4.0 world.
Threats Facing Industry 4.0
Interconnection of multiple systems leads to increased system complexity. Naturally, increasing complexity alludes to an increase in security vulnerabilities. Let’s look at a few major threats to 4.0 systems.
Denial of Service
Denial of Service refers to the act of rendering the services offered by a system unavailable. Usually a server is overwhelmed by a great number of requests to utilize all available resources. Industry 4.0 components are interconnected as processes and systems. Therefore, in the event of a Distributed Denial of Service attack (DDoS), servers and various components such as sensor networks may be damaged.
System downtime and unavailability is also a consequence. This ends up being extremely costly for an enterprise since physical components such as sensors and servers may need to be replaced and reconfigured. Service downtime in a business context is also tremendously expensive. These attacks are highly unpredictable therefore difficult to manage and regulate.
For more detailed information on what a Denial of Service attack is, feel free to read this article.
In this competitive industrial landscape, there is incentive in acquiring key information about the competitor. Thanks to the interconnected nature of the Industry 4.0 systems, various competitors may interact and collaborate to achieve various production goals. Increased interconnection of physical systems, and the vast nature of these networks means data is widespread across these systems, proving that there are even more points of attack and access confidential information. For example, attackers may eavesdrop, through executing a Man-In-The-Middle attack.
Furthermore, the evolution of cybercrime has bred increasingly organized groups of cyber criminals who find an incentive in targeting various industries and accessing critical information and intellectual property. Solutions to these increasingly common fears and problems should be geared towards guaranteeing transparency and trust across these platforms, systems, and networks.
Incidents and Attacks
Typical malware and virus outbreaks have been one of the biggest threats to Industry 4.0 systems. Another threat that has grown in popularity is the ransomware attack, where data is ransomed and encrypted until a specific condition given by the attacker is satisfied.
Since this new era of smart manufacturing is ever evolving, employees shall be forced to become more competent with technology. Nonetheless, it is very simple for employees to make errors or act unintentionally and put the security of the enterprise in jeopardy.
On the other hand, employees may act maliciously and sabotage the systems intentionally. Acts of vandalism are an example of physical attacks on systems. Also, considering the collaborative ethos of Industry 4.0, several partners along the value chain interact. This easily provides a chance for threats from third parties. In addition to denial of service, breaches may also lead to the leaking of personal data, manipulation of information, hardware, and software.
However, not all threats can come from nefarious persons or groups. Factors such as hardware failure as well as errors in industrial software is an issue and their ramifications iterate how critical the security of these systems is. Sensors and actuators may malfunction. Network and power outages may cause system downtime. Natural disasters pose a threat as well.
Industry 4.0 Cybersecurity Approaches, Measures, and Solutions
Security is usually characterized by financial investment without a return on that investment. Especially considering a preventive approach in an organizational setting. Yet, investing in a proactive approach is better than a reactive one. Financial investments may be used to onboard competent cybersecurity personnel, set up physical systems to prevent incidents, or software to do the same.
A reactive approach is whereby an enterprise is responding to a threat or challenge. This may turn out to be more expensive. Consider a situation whereby potential industry-leading trade secrets, plans, and methods are leaked or intercepted. Or a scenario whereby an Industry 4.0 system experiences end to end downtime. Or finally, a situation involving a ransomware attack in IIoT. These would be expensive to recover from. These examples showcase how investment into Industry 4.0 security is necessary.
Data Security as a Standard and Solutions for Massive Heterogeneous Data
Industry 4.0 systems, generate colossal heterogeneous data at any given moment. Data management and storage may increase the measure of vulnerability and risk. Organizing all this information requires the data to be secure first. There has to be a solid data security plan and there is an efficient solution to this challenge. Definition and development of secure data protocols is key. These protocols would allow interpretation, processing, and organization of the data.
Standard Security Solutions
Use of simple, well-known solutions may reduce chances of breaches. This is applicable in specific use cases. As with standard IT systems, access authentication, access control, and key management. A few common information security measures come to mind. The use of application protection, anti-malware, and antivirus are good examples. One can track network usage, traffic, and logs and put in place network segmentation. Security training of personnel is a valid solution as well.
Patching systems is also an option. This may prove useful to ensure industrial systems are up to date and secure. Additionally, regular system audits and frequent penetration testing are worthy measures.
The integration of these emerging technologies has brought rapid changes to industries. The changes have brought about huge technological, social, and economic impact. This means that we need more extensive research. Research can drive development towards more improved system architectures. This should be achieved without compromising the principles of security.
Industry 4.0 has the potential to be the undisputed fourth industrial revolution. Yet, there is some distance to go before it lives up to its full potential and application. Managing or solving the discussed challenges is key to the longevity of Industry 4.0.
We should not underestimate the need for further research. It would go a long way in understanding how to design better Industry 4.0 infrastructure. Standardized policies and reworked cybersecurity frameworks that can accommodate Industry 4.0 systems from end to end need to be set in place for this initiative to be a success.
Peer Review Contributions by: Sophia Raji