AIMS Electronics and Electrical Engineering, 5(2): 146–157.

DOI: 10.3934/electreng.2021008
Received: 08 April 2021
Accepted: 25 April 2021
Published: 26 April 2021
http://www.aimspress.com/journal/ElectrEng

Review

Cyber security during the COVID-19 pandemic

Lidong Wang1,* and Cheryl Ann Alexander2
1
Institute for Systems Engineering Research, Mississippi State University, Mississippi, USA
2
Institute for IT innovation and Smart Health, Mississippi, USA

* Correspondence: Email: lidong@iser.msstate.edu.

Abstract: COVID-19 has changed the way cyber security is viewed by corporations in the global
community. Not only did COVID-19 make many individuals work at home, sometimes on their own
computers, and using their own routers, virus protection, etc., the lack of cyber security protection
that individuals can provide against hacker attacks, especially for highly sensitive information can be
limited. This paper introduces major technologies (such as 5G, blockchain, telemedicine, and big data)
in fighting COVID-19, cyber-attacks, and cyber risks (due to people‟s actions as well as systems and
technology failures) during the COVID-19 pandemic, cyber security for telework, cyber security of
Internet of Things (IoT) and telemedicine, and cyber security based on blockchain technology.
Blockchain helps mitigate the risks of COVID-19 and improves the privacy and security of health
systems.

Keywords: cyber security; COVID-19; cyber-attacks; IoT; telemedicine; artificial intelligence;

blockchain; privacy; telework; SARS-CoV-2

1. Introduction

COVID-19 is a worldwide public health emergency. The Cybersecurity and Infrastructure

Security Agency of the US Department of Homeland Security (DHS) announced an advisory
memorandum regarding essential critical infrastructure workers March 28, 2020 [1]. Leadership for
dealing with COVID-19 needs to break information silos and coordinate efforts for stopping or
containing the new coronavirus that causes COVID-19. Sustainable human security is significant. A
broader health system emphasizes security in healthcare, environmental pollution, foods, economy,
and preparedness for future possible pandemics. South Korea has realized the importance of tracking
infected individuals‟ movements and persons who had contacted with them [2,3].
Many people had to work at home, choose telemedicine, and perform distance learning and
online schooling due to the COVID-19 pandemic. Requirements for these people include computers,
the Internet, firewall software, cameras, etc. Meetings can be conducted via video conferencing.
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Although calls can be encrypted for security, COVID19 generated new challenges in cybersecurity
[3,4]. Work and study at home due to COVID-19 causes increased Internet uses, entices more people
to spend much time online, and provides more opportunities for cybercrime [5]. Deadly cyber
security threats include malware, spam email, malicious websites, ransomware, malicious domains,
DDoS attacks, business email compromise, malicious social media messaging, etc. [6,7]. The
development of ICT usage is submitted to security requirements. Factors related to the security
include staff‟s awareness in ICT security, activities related to ICT security, policies regarding ICT
security, etc. [8].
During the COVID-19 pandemic, it is important to avoid close contact with many people in
daily life. Radio frequency identification (RFID) is helpful for shopping systems, supply chain
management, and security. RFID utilizes radio waves and RFID tags with microchips for storing data
and antennas for receiving and transmitting radio frequency signals. RFID can provide an extra anti-
theft mechanism. Many RFID tags can be read at the same time and from a long distance. Therefore,
RFID helps improve the efficiency, safety, and security of various systems during the COVID-19
pandemic [9] due to its simultaneously multiple readings and the capability of remote identification.
The purpose of this paper is to introduce cyber risks and cyber security during the COVID-19
pandemic. The subsequent sections of the paper are organized as follows: the second section
introduces major technologies in fighting COVID-19, the third section presents cyber-attacks and
cyber risks due to COVID-19, the fourth section introduces cyber security for telework, the fifth
section presents cyber security of IoT and telemedicine, the sixth section deals with cyber security
based on blockchain technology, and the seventh section is a conclusion.

2. Major technologies in fighting COVID-19

Tactile edge technology focusing on 5G or beyond 5G (B5G) helps control COVID-19 and is
more powerful than 4G-enabled technology. The use of edge computation based on 5G wireless
network facilitates the control process of the novel disease. A hierarchical system of edge computing
has advantages, e.g., scalability, low latency, protecting training model data. Pervasive edge
computing can be utilized to achieve better security. A B5G-based healthcare framework was
developed to fight pandemics like COVID-19. The framework covers a cloud layer, an edge layer,
and a stakeholder layer. It can be integrated with a surveillance system (for mask-wearing, social
distancing, body temperature testing). The developed COVID-19 diagnostic method can help to
identify patients without COVID-19 infection, avoid overcrowding in a hospital, and process
sensitive personal data [10]. More technologies and their main applications in fighting against
COVID-19 are summarized in Table 1.
An authentication scheme for cloud-assisted vehicular ad hoc networks (VANETs) was
developed [12]. Passengers‟ physical status can be measured timely and without any contact based
on vehicular cloud (VC). A vehicle recording mechanism based on blockchain was fulfilled using
edge units and the VC. Requirements for COVID-19 control can be met [12]. Table 2 shows main
security features for a VANET security scheme.

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Table 1. Main applications of some technologies in fighting COVID-19 [11].

Technologies Main applications

Virus genome  Deciding the genome sequence pattern and monitoring the genome mutation of the
sequencing virus.
technology  Detecting the virus behavior for its controlling.
IoT  Creating a network of electronic communications between various tools and reducing
physical communications.
 Collecting real-time data from people who are infected with COVID-19.
Drones  Disinfecting places, e.g., hospitals.
 Transporting food, water, medicine, and laboratory samples of patients.
 Detecting people with high-risk behaviors and guiding them.
Geographic  Performing complex spatial analyses to extract the geographical distribution of
information COVID-19 transmission.
system  Prioritizing service delivery according to the need for medical services or the
prevalence of COVID-19.
Artificial  Estimating the structure of coronavirus proteins.
intelligence (AI)  Analyzing the information related to COVID-19.
 Differentiating COVID-19 from other infectious pulmonary diseases.
 Epidemiological modeling of the number of patients.
 Diagnosing new coronavirus infection.
Telemedicine  Distance learning to prevent COVID-19.
 Tele-monitoring synchronously in mobile health centers.
 Tele-triage to monitor people, especially in quarantine conditions.
 Post-discharge follow-up.
Big data and  Gathering huge amounts of data into a secure platform.
blockchain  Conducting analyses, extracting models of virus behaviors,
and finding appropriate vaccines and drugs.
Robots  Distributing medicines and personal protective equipment.
 Distributing food among quarantined people.
 Cleaning and disinfecting hospitals.
 Controlling contaminated waste.
 Reducing direct contact with patients by performing lab tests, measuring vital signs,
etc.
 Controlling social interactions and training individuals to fight COVID-19.

Table 2. Major security features for a VANET security scheme [12].

Security features Description

Mutual Leading security feature, preventing impersonation attacks on certain devices.
authentication
Targeted vehicle information retrieving and user privacy preserving are the aspects of
Conditional privacy
conditional privacy. The VC is responsible for managing the VANET system and
protection
should enable showing identities of suspect vehicles.
Unforgeability against chosen message attack is the major property in secure data
Unforgeability
exchange.
Non-repudiation The validity of transmitted information is guaranteed.
Anonymity The anonymity of ever VANET device needs to be ensured.
Session key The session key between the VANET system and an individual vehicle is unique. It
establishment needs to be created for following data exchange with security.

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3. Cyber-attacks and cyber risks during the COVID-19 pandemic

The disruption due to COVID-19 has disclosed the weaknesses of existing institutions in
protecting human health and well-being. A lack of timely and accurate data and widespread
misinformation have caused ever-increasing harms and growing tension between public health
concerns and data privacy. In the absence of accurate data and reliable information, the suffering due
to COVID-19 has been worse. The COVID-19 crisis is an information crisis as well as a trust crisis.
It has underlined failures of existing systems in trust and data sharing. During the crisis, main supply
chain failures have been noticed, especially for personal protective equipment (PPE) and lifesaving
ventilators in clinics and hospitals [13].
Digital methods have played a significant role during the COVID-19 pandemic. However, there
are telemedicine challenges and other digital approaches in privacy and security for protected
information [14]. Since the beginning of the COVID-19 pandemic, there has been remarkable
increase in the number of cyber-attacks. During the pandemic, major cyber risks are caused by
people‟s actions as well as failures of systems and technology. The source of operational risk
includes people‟s actions, for example, deliberate (e.g., theft, sabotage, fraud, and vandalism),
inadvertent (i.e., omissions, errors, and mistakes), and inaction (e.g., availability, knowledge, skills,
and guidance). Failures of systems and technology lie in software (i.e., coding practices, testing,
security settings, change control, configuration management, and compatibility), hardware (i.e.,
capacity, performance, maintenance, and obsolescence), and system (i.e., specifications, design,
integration, and complexity) [15]. Table 3 lists part of malicious and non-malicious breaches. Some
potential attack scenarios are shown in Table 4.

Table 3. Some malicious and non-malicious breaches [16].

Types Description
Stolen device Stolen smartphone, laptop, hard drive, portable memory device, etc., and data
(e.g., sensitive information) along with the device.
Insider fraud A person (e.g., a contractor or employee) with legitimate access intentionally
breaches information.
Outside fraud, not device Discarded, lost, or stolen nonelectronic records (e.g., paper documents); fraud
(involving credit or debit cards) without being accomplished via hacking.
Malware or hacking Electronic entry by an outside party, malware, spyware.
Accidental disclosure Sensitive information publicly posted on a website, mishandled, or sent to a
wrong party via fax, email, or mail.

Table 4. Some potential attack scenarios [17].

Attacks Description
An attacker collects auxiliary information of a target from various sources, combines
Linking attack the information, creates an overall picture of the target, and performs attack.
Sybil attack Attacking data redundancy mechanisms.
Spoofing attack One object pretends to be another object‟s identity for gaining trust, entering the
system, spreading malware, stealing data, etc.
Attackers use Denial of Service (DoS) or Distributed DoS (DDoS) to block users from
DoS/DDoS accessing services on the network by initiating a huge useless information and
therefore causing network congestion.

It is necessary for organizations to solve problems about the security and privacy of all
stakeholders‟ personal data through creating applicable frameworks for data governance. From an
ethical point of view, technical compliance with data and privacy laws is often insufficient to protect
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organizations from frustrated consumers. There should be adequate incorporated safeguards to

handle ethical risks and possible risks in security and reputation of organizations. From a legal point
of view, organizations should employ suitable processes to guarantee compliance with laws related
to data capture, storage, utilization, and disclosure [18].

4. Cyber security for telework

Working at home due to COVID-19 is the “new normal”. Many individuals will not return to an
office when the pandemic is over; most individuals in a “work from home” setting will continue in
that mode, even after the vaccine has been fully distributed. Schools will most likely be returning
from the 14-month hiatus this coming (i.e., 2021) fall. Security and risks in reputation, especially for
businesses with sensitive data which have been a concern after regulations of self-isolation pushed
people to work at home and organizations had to adapt their business models to accommodate a
remarkable increase of network activities. Many hackers have consistently redirected their activities
from attacking business toward activities that could reach consumers or employees at their homes
through platforms, e.g., Netflix or Zoom [18]. Table 5 shows some items of risky cyber security
behaviors.

Table 5. Some risky cyber security behaviors [5].

No Items
1 Clicking on a link in an unsolicited email from an unidentified source.
2 Utilizing the same password on various websites.
3 Downloading free software of anti-virus from an unidentified source.
4 Entering payment information on a website without clear security information/certification.
5 Downloading materials from a website on a work computer without verifying its authenticity.
6 Downloading digital media (games, movies, and music) from unknown sources.
7 Utilizing free-to-access public Wi-Fi
8 Utilizing an online storage system to keep and exchange sensitive or personal information.
9 Saving organization‟s information on a personal electronic device such as laptop, tablet, or
smartphone.

Table 6. Some technologies and targeted technology brands [19].

Technology types Targeted/impersonated Situational factors Cybercrimes

technology brands
Online system for payments Paypal Small business loans Fake website domain
Emails Gmail Donation Fake emails (e.g.,
phishing)
Video sharing websites YouTube Leisure/entertainment Fake products
Social media technology Facebook Social networking Fake social media
profiles
Cloud file hosting services One Drive Remote work Fake products
Companies with broadband 4 G (fake company) Internet/free data Fake products
and telecoms
Videotelephony and chat Zoom Remote work Fake products
services online
Streaming media service Netflix Entertainment/ Fake products
(movies and television) leisure

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During the COVID-19 pandemic, many organizations perform the teleworking model, causing
insufficient cyber security for employees. A lot of employees‟ networks at home may consist of
outdated PCs and insecure devices of IoT. The pandemic has caused technological and end-user
vulnerabilities and cyber criminals are exploiting telework vulnerabilities [19]. Tables 6 shows
technologies, targeted/impersonated technology brands, situational factors, and cybercrimes.
COVID-19 has caused a shift from ecosystems to a virtual workplace for employees, which
brough up challenges in cyber security risks because there are more vulnerabilities on employee‟s
personal computers and their home Internet [20]. Table 7 lists telework cyber security
recommendations for remote employees.

Table 7. Cyber security recommendations for telework employees [20].

Aspects Recommendations
Implement two-factor or multi-factor authentication: a text code or a call for
Authentication authentication is sent to an employee‟ phone before access to an organizational
network is granted.
Management of
mobile application Implement security measures such as malware scans, data encryption, etc.
and mobile devices
Security patches and Guarantee mobile devices and computers for accessing work networks have virus
virus protection protection and updated security patches.
 Do not share work computers, reducing risks in inadvertent or unauthorized access
to secured company information.
Implementation  Do not access company‟s information systems while on public Wi-Fi with the
of policies utilization of a VPN.
 Do not download organization‟s sensitive information and save it to cloud
services (e.g., Google Drive) or personal devices (e.g., thumb drives and
employee‟s computers).
 Train employees on how sensitive data are safeguarded and encrypted at home.
Training of  Train them on using Virtual Private Networks (VPNs) to guarantee that the use of
employees Internet is encrypted and that an employee user‟s location is private when
assessing company‟s network.

5. Cyber security of IoT and telemedicine

Cyber risks are one of main barriers to wide applications of IoT in healthcare. Patients‟ privacy
needs to be protected, ensuring to prevent unauthorized tracking and verification. IoT may provide
opportunities for cyber-attacks and for personal information to be captured improperly. Applications
based on IoT are vulnerable to cyber-attacks for two reasons: 1) many communications are wireless,
making eavesdropping relatively easy when high encryption is not used; 2) low energy is a feature of
most IoT components; however, it is hard for them to perform schemes for a guarantee of security [21].
Realizing interoperability across IoT platforms helps deliver more accessible and safer services in
healthcare. Data sharing across various countries is also a concern. Data security, confidentiality, and
privacy should be federally implemented; however, international hosts or suppliers might not follow
domestic laws or regulations [22].
A model for remote health monitoring that uses a lightweight block encryption approach to
provisioning security for health in an IoT environment based on the cloud was developed. Data
mining was used to analyze biological data generated from IoT devices and a patient‟s health status
is obtained through the analysis. The patients‟ sensitive data are protected using the encryption
approach [23]. IoT has been employed in the control of COVID-19, but there are security issues and
privacy risks during data storage and transmission [17].

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Telehealth offers opportunities in reducing visits to hospitals, which protects patients and others
from the COVID-19 infection. However, telehealth creates cyber security and privacy risks because
a patient‟s home may not have enough protections in place. Telehealth also provides new
opportunities in the sharing of health information with security and privacy implications [24].
Telemedicine security threat areas are shown in Table 8 [25–28].

Table 8. Telemedicine security threat areas.

Security threat areas Description
Telemedicine systems are vulnerable to security risks related to sniffing,
privilege escalations, and alteration/forgery because medical, private, and
Internet
health information as well as prescriptions are transmitted via the Internet.
They include Bluetooth, Wi-Fi, local area network, near field communication,
etc. A telemedicine service system based on the home network is vulnerable to
Home networks
security attacks related to end-to-end plaintext transmission and man-in-the-
middle (MITM) threats.
A gateway acts as an intermediary between a patient and a telemedicine
Gateway devices system, making the system vulnerable to security attacks related to rogue
gateway, the theft/loss of the gateway, and MITM threats.
A telemedicine terminal based on an embedded-type real-time operating
Telemedicine system is safe from unauthorized access, but a device (e.g., smartphone) based
devices on a general-purpose operating system uses external apps; therefore, it is
vulnerable to security attacks.
It handles the data of patients and is possibly connected to related agencies via
The telemedicine a governmental network hub. It can be utilized for wireless communication
system between computers and patients‟ exercise equipment for teleconsultation. It
attracts security threats related to malicious code, illegal network access,
MITM attacks, and telemedicine app alteration/forgery.
Most of them live in a remote region, without any training regarding cyber
Patients or users security or with little interest in cyber security; therefore, it is easy for their
utilization of telemedicine terminals to receive security attacks due to device
loss, weak passwords, device use errors, etc.
A telemedicine system mainly involves doctor-to-patient and doctor-to-doctor
Telemedicine
interactions. It is vulnerable to security attacks due to wiretapping, leakage of
service providers
important data, prescription alterations, and device use errors.

For many organizations, increased investments in compliance (privacy), information security

(telework/business continuity), supply chain, and emergency management will help develop
infrastructures. Telemedicine allows a greater number of patients to be examined by health care
providers while following disease containment protocols of self-isolation regarding COVID-19.
Patients receive education, monitoring, and consultation [29]. In the COVID-19 pandemic, tele-
healthcare service is needed for the reduction of patient movement and thus the reduction of
infection. A tele-medical laboratory service was proposed based on IoT and the cloud. Specifically,
physicians, nurses, and other medical staff from various hospitals worked together using their
federated hospital clouds, created a virtual health team, and completed a healthcare workflow with
security [30].

6. Cyber security based on blockchain technology

Blockchain technology offers immutable and distributed ledgers with auditable records, which
is ideal for tracking every asset in supply chain management. It depends on a distributed, privacy-

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preserving, secure, and immutable record-keeping framework [13]. Governments and hospitals can
identify COVID-19 suspected cases, locations related to reported cases, and infected areas with high
risks using blockchain. Blockchain has also been utilized to guarantee healthcare data security [10].
During the COVID-19 pandemic, it is significant to track patients and analyze their symptoms or
reactions to the disease. Blockchain is a helpful platform in many countries affected by COVID-19,
particularly in healthcare [31].
Insufficient data for risk assessment for catching or transmitting COVID-19 caused the quick
spread of COVID-19 in general. Many patients were asymptomatic and the transmission
mechanism for COVID-19 was not well understood until around May 2020. When cyber-attacks
lead to information block, a permissioned blockchain offers two advantages: 1) anybody in the
medical consortium can check when and how transactions and information occur; 2) blocking the
information will change the hash. Therefore, patients can transmit personal records without any
tampering risks [32]. For SARSCoV-2 (causes COVID-19) sequences, a closed hub was created
that controls access and prohibits redistribution. Commercial aspirations can delay data sharing
because patent incentives hinder open dissemination. Blockchain enables proof of the existence of
specific data objects and their content [33]. COVID-19 data from the Centers for Disease Control
and Prevention (CDC) in the United States include data and metadata. Blockchain helps manage
medical data, identify patterns of symptoms, track supply chains of medical supplies and
medicines, and increase diagnostic accuracy and effectiveness of treatment [3].
„Social Internet of Things‟ (SIoT) integrates people and smart devices interacting within a
social structure of IoT, which is often through IoT platforms. Cloud IoT ecosystems are disruptive,
but with many issues regarding security and privacy. SIoT has the same risks. Malware aims at
people working at home and healthcare organizations. Blockchain can enhance the security and
privacy of digital health systems [34]. A system based on blockchain was proposed to offer the
secure management of home quarantine [17].
A novel blockchain-based framework was proposed to integrate intercountry for COVID-19 and
track infected or tested patients globally. The framework is being developed as a new system with
two components: access point and a single decentralized Ethereum-enabled virtual machine [35].
Blockchain is utilized to bridge the supply chain visibility gap because of its security features such as
tamper-resistant, hash proof, and immutability. COVID-19 has disrupted many global supply chains.
Rapid Supplier Connect, an IBM blockchain-based network, has been developed to help strengthen
medical supply chain during the COVID-19 pandemic [36].
The coupling of AI with blockchain for self-testing and tracking systems has been proposed for
the surveillance of COVID-19. Not only can such a system of self-testing achieve a higher testing
rate, but it also allows for risk stratification of suspect cases [37]. Blockchain is also effective in data
sharing between groups [38]. The applications of blockchain and AI in healthcare can be
summarized as follows: health data analytics, remote patient monitoring, drugs and pharmaceutical
supply chain management, management of electronic medical records (EMRs), etc. [39].
The management of electronic health records (EHR) with blockchain can reduce clinical bias [40].
The problem of interoperability among various EHR systems may be fixed through utilizing separate
blockchain systems [38]. Table 9 shows the SWOT analysis of the utilization of a blockchain-based
model in healthcare.

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Table 9. SWOT of using a blockchain-based model in healthcare [38]

Positive Negative
Strengths Weaknesses
 Transparency  Lack of flexibility
Internal  Trust  Creation of possible forks
 Immutability  Operation costs
 Privacy  Need of greater capability of
 Disintermediation and data storage on local servers
automation
Opportunities Threats
 Increase in technology  Lack of expertise
External awareness and new expertise  Resistance to change
development  Lack of trust in the
 Greater collaboration among application of a new
operators in the healthcare technology by healthcare
system workers

7. Discussion

During the COVID-19 pandemic, there have been many cyber security issues. However, because
there were so many infections and deaths, the pandemic became more news than cyber security vents.
Overall, more people are working at home now and using their own security systems and modems.
While this adds some layers of protection against cyber security events, it is not generally strong
enough to protect the work environment from cyber security casualties. Therefore, the extent of cyber
security in the pandemic era means that more stringent levels are layers of cyber security are necessary
and should be developed overall while working at home. There needs to be more cyber security
options, for example, during the pandemic we should have had a better option for work at home
individuals who needed that added layer of security and protection. Most people who worked from
home during the pandemic did not have specific training in IT or cyber security; therefore, better
training procedures and more efficient programs that provide that extra layer of protection needs to be
developed by engineering so that in the future should we have another situation like the COVID-19
pandemic we can provide security for ourselves when we work at home.
Associated with the human conduct aspect of cybersecurity is the undertaking of risky behaviors.
Cybersecurity breaches are relevant to both technical implementation and the routine processing of
confidential electronic information. Many cybersecurity breaches result from human errors. There
should be further research on cybersecurity in relation to human behaviors based on human error-
related -related incidents [41]. The data protection and cybersecurity authorities of the European Union
(EU) have identified encryption as a significant tool that can contribute to the confidentiality, privacy,
data integrity, and data availability of communications and personal data. It has been agreed to enhance
the ability of the EU in protecting itself against cyber threats and providing a secure communication
environment, especially through quantum encryption [42].
Smartphones and their ability to keep track of their locations (e.g., via GPS and Wi-Fi), along
with their built-in Bluetooth interfaces (permitting communication and proximity detection with nearby
smartphones), make themselves useful devices for contact tracing. Smartphone contact tracing apps
help trace all recent contacts of newly identified individuals with COVID-19 infection, but tracing apps
face challenges, including proximity estimation, attack vulnerability, the management of user data, and
the privacy and security of the apps [43]. For future research, contact tracing or tracing based on

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quantum computing [44] will be exponentially powerful. It may include artificial learning algorithms
and advanced Monte-Carlo or particle filter type tracking solutions. Quantum sensing [45] utilizes
hypersensitivity embedded in quantum entanglements as an approach to improved timing, network
synchronization, location accuracy, and accelerometer accuracy. It is very useful in contact tracing and
can maximize the efficacy and overall performance. Quantum communications [46] is one of advanced
quantum applications. One of its major impacts on tracing applications will probably be improved
cybersecurity in communications and enhanced privacy protection [43].

8. Conclusion

During the COVID-19 pandemic, there are many cyber risks due to people‟s action as well as
failures in systems and technology. Telework and IoT-based applications are vulnerable to cyber-
attacks. Telehealth provides an opportunity to protect patients, physicians, nurses, etc. from the
COVID-19 infection. However, telehealth creates cyber security and privacy risks. Blockchain helps
pandemic management and improves the privacy and security of digital health systems. The
combination of blockchain and AI facilitates health data analytics, remote patient monitoring,
management of EMR, drugs and pharmaceutical supply chain management, etc.
COVID-19 has issued in a new age of cyber awareness as companies now send their employees to
work from home with limited security. Virtual private networks (VPNs) and servers will play a
significant role in cyber security of the future. Not only are many companies across the world going to
work from home models, thousands of work-from-home companies are now springing up and are
facing similar problems. Cyber criminals are all too aware of the limited security that individuals can
provide at home. New challenges for the work-at-home individuals include finding simple yet secure
solutions for cyber security.

Acknowledgments

Authors thank Technology & Healthcare Solutions, Mississippi, USA for support.

Conflict of interest

Authors declare no conflict of interest.

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