Chun-Ta Li

• Doctor of Philosophy
• Professor at Fu Jen Catholic University

This review systematically explores the application of machine learning (ML) models in the context of Intrusion Detection Systems (IDSs) for modern network security, particularly within 5G environments. The evaluation is based on the 5G-NIDD dataset, a richly labeled resource encompassing a broad range of network behaviors, from benign user traffic...

In recent years, the rapid advancements in wireless communication technologies have necessitated more efficient and integrated systems. An emerging paradigm addressing this need is the integration of Intelligent Reflecting Surfaces (IRS) with Non-Orthogonal Multiple Access (NOMA) for Integrated Sensing and Communication (ISAC). This paper offers a...

Mobile sequencing enables a rapid process of determining the order of nucleotides in deoxyribonucleic acid (DNA). The process is carried out by portable sequencers, which are the main element in the internet of living things (IoLT). This approach assists in obtaining rapid biological insights at the source regardless of the patient’s geographical l...

This article describes our point of view regarding the security capabilities of classical learning algorithms (CLAs) and quantum mechanisms (QM) in the industrial Internet of Things (IIoT) ecosystem. The heterogeneity of the IIoT ecosystem and the inevitability of the security paradigm necessitate a systematic review of the contributions of the res...

Empirical evidence indicates that asset returns adhere to an extended normal distribution characterized by excessive kurtosis and non-zero skewness. Consequently, option prices derived from this distribution diverge from those predicted by the Black–Scholes model. Despite the significance of option price sensitivities for risk management in investm...

Benchmarking different optimization algorithms is tasky, particularly for network-based cellular communication systems. The design and management process of these systems involves many stochastic variables and complex design parameters that demand an unbiased estimation and analysis. Though several optimization algorithms exist for different parame...

The advancement of 6G networks is driven by the need for customer-centric communication and network control, particularly in applications such as intelligent transport systems. These applications rely on outdoor communication in extremely high-frequency (EHF) bands, including millimeter wave (mmWave) frequencies exceeding 30 GHz. However, EHF signa...

The symmetric function class interacts heavily with other types of functions. One of these is the convex function class, which is strongly related to symmetry theory. In this study, we define a novel class of convex mappings on planes using a fuzzy inclusion relation, known as coordinated up and down convex fuzzy-number-valued mapping. Several new...

Mobile edge computing (MEC) supported by non-orthogonal multiple access (NOMA) has recently gained a lot of interest due to its improved ability to lessen power consumption and MEC offload delay. In recent decades, the need for wireless communications has increased tremendously. Fifth-generation (5G) communications will soon be widely used and offe...

A keylogger is a type of spyware that records keystrokes from the user’s keyboard to steal confidential information. The problems with most keylogger methods are the lack of simulated keylogger patterns, the failure to maintain a database of current keylogger attack signatures, and the selection of an appropriate threshold value for keylogger detec...

The application of the Internet of Medical Things (IoMT) in medical systems has brought much ease in discharging healthcare services by medical practitioners. However, the security and privacy preservation of critical user data remain the reason the technology has not yet been fully maximized. Undoubtedly, a secure IoMT model that preserves individ...

With less human involvement, the Industrial Internet of Things (IIoT) connects billions of heterogeneous and self-organized smart sensors and devices. Recently, IIoT-based technologies are now widely employed to enhance the user experience across numerous application domains. However, heterogeneity in the node source poses security concerns affecti...

This paper introduces 5GT-GAN, a novel approach leveraging generative adversarial networks (GANs) to create synthetic mobile Internet traffic data, particularly tailored to smart city applications. Given the challenges of data scarcity and privacy concerns in the context of 5G, generating synthetic data becomes a crucial aspect for effectively depl...

Benchmarking different optimization algorithms is tasky, particularly for network-based cellular communication systems. The design and management process of these systems involves many stochastic variables and complex design parameters that demand an unbiased estimation and analysis. Though several optimization algorithms exist for different parame...

The privacy of individuals and entire countries is currently threatened by the widespread use of face-swapping DeepFake models, which result in a sizable number of fake videos that seem extraordinarily genuine. Because DeepFake production tools have advanced so much and since so many researchers and businesses are interested in testing their limits...

The accurate and reliable predictive estimation of signal attenuation loss is of prime importance in radio resource management. During wireless network design and planning, a reliable path loss model is required for optimal predictive estimation of the received signal strength, coverage, quality, and signal interference-to-noise ratio. A set of tre...

In recent years, due to the rapid development of Internet of things (IoTs), various physical things (objects) in IoTs are smart enough to make their own decisions without the involvement of humans. The smart devices embedded in a drone can sense, collect, and transmit real-time data back to the controller from a designated environment via wireless...

Reversible Data Hiding in the Encrypted image (RDHEI) is an important research topic. This paper improves Korivi and Manikandan's RDHEI method. For each block in the encrypted image, the reverse strategy of MSB is adopted to embed the secret information. Thus, each block can embed a bit of confidential information. In addition, we propose a simplif...

In recent years, counterfeit luxury products have become a major concern for consumers worldwide. The reason for the proliferation of counterfeit products is that the manufacturing and distribution process is not transparent to consumers and this information can be easily falsified or altered by others. To solve this problem, this paper proposes th...

Modern cellular communication networks are already being perturbed by large and steadily increasing mobile subscribers in high demand for better service quality. To constantly and reliably deploy and optimally manage such mobile cellular networks, the radio signal attenuation loss between the path lengths of a base transmitter and the mobile statio...

The rapid growth in the number of vehicles has led to traffic congestion, pollution, and delays in logistic transportation in metropolitan areas. IoT has been an emerging innovation, moving the universe towards automated processes and intelligent management systems. This is a critical contribution to automation and smart civilizations. Effective an...

Atmospheric impairment-induced attenuation is the prominent source of signal degradation in radio wave communication channels. The computation-based modeling of radio wave attenuation over the atmosphere is the stepwise application of relevant radio propagation models, data, and procedures to effectively and prognostically estimate the losses of th...

Cassava is a crucial food and nutrition security crop cultivated by small-scale farmers and it can survive in a brutal environment. It is a significant source of carbohydrates in African countries. Sometimes, Cassava crops can be infected by leaf diseases, affecting the overall production and reducing farmers’ income. The existing Cassava disease r...

Fog-driven IoT architecture located between IoT devices and the centralized cloud infrastructure is introduced to extend computing, storage and network services to the edge of the Internet and therefore resources and services of the fog nodes are available and are closer to the end user and end device for providing mobility, low latency and locatio...

In the current medical insurance claims process, there are problems of low efficiency and complex services. When a patient applies for medical insurance claims, he/she must go to the hospital to apply for a diagnosis certificate and receipt and then send the relevant application documents to the insurance company. The patient will not receive compe...

In healthcare services, telecare medicine information systems (TMIS) is the viable solution offered currently. Moreover, to provide best security to the TMIS, it attracted the various researchers to investigate the security challenges in TMIS. Subsequently, the security of TMIS is improving but the application becoming widespread hence needs robust...

With the rapid development of the social economy, our lives are flooded with all kinds of counterfeit products. The public’s attitude of greedy for petty and cheap has encouraged unscrupulous manufacturers to take advantage of the opportunity to provide low-cost counterfeit products, suppress the profits of legitimate manufacturers, and also make t...

Cloud computing technologies have been prospering in recent years and have opened an avenue for a wide variety of forms of adaptable data sharing. Taking advantage of these state‐of‐the‐art innovations, the cloud storage data owner must, however, use a suitable identity‐based cryptographic mechanism to ensure the safety prerequisites while sharing...

In recent years, due to the rapid development of information techniques and network technologies, more and more medical documents have been replaced by electronic files for sharing and transmitting in real time. However, medical data transmitted over public communication channels may suffer from security attacks and privacy threats. Blockchain tech...

In recent years, Radio Frequency Identification (RFID) applications of various kinds have been blooming. However, along with the stunning advancement have come all sorts of security and privacy issues, for RFID tags oftentimes store private data and so the permission to read a tag or any other kind of access needs to be carefully controlled. Theref...

Recently, the chaos theory has been dealt with as a decent approach to reducing the computational complexity of a cryptographic technique while fulfilling the security necessities. In an ID-based cryptographic system where public keys are distributed to individual users, the application of chaotic maps allows users to set their network addresses or...

Radio Frequency Identification (RFID) is a wireless communication technology nowadays widely used in almost every aspect of our lives including healthcare, logistics and supply chain management, inventory tracking, race timing, access control, toll collection, and a lot more. In RFID systems, a tag usually stores private or sensitive information, a...

Chaos has been dealt with a decent approach to reduce computational complexity while fulfilling security necessities of a cryptographic techniques. In this article, we purpose an efficient online/offline ID-based short signature procedure based on extended chaotic maps and also demonstrated that it is protected under unforgeability of ID-based shor...

As e-commerce services and Internet technology have rapidly developed in recent years, many services and applications integrating these technologies can now be completed online. These commercial activities include online auctions, online ticketing and online payments. The client shops from the store online, andthe store delivers the goods to the cl...

As the internet makes data transmission easy and fast, digital contents of all kinds can be spread all over the world at a shocking speed. Along with such amazing swiftness and convenience, however, modern computer and communication technologies have also brought various kinds of issues associated with digital rights management. Digital rights mana...

As wireless sensor networks (WSN) and Internet of things (IoT) have rapidly developed over recent years, the smart vehicular system is designed in the environment of WSN to provide vehicle related applications such as traffic safety for drivers, controlling traffic signal, broadcasting traffic information and speed monitoring etc. Recently, Mohit e...

With the rapid growth in the popularity of mobile devices and development of network technologies, various online social networking applications have grown in popularity. While these social networking sites provide benefits in terms of enhanced connectivity with people all around the world, they can also pose security threats and raise privacy conc...

Due to the advancement of convenience technology for people, the era of Internet of Things (IoT) has going on thriving, which has brought more and more attention to Radio Frequency Identification (RFID), as RFID is key to the sensor technology in IoT. As promoting of IoT, kind of protocols combine cloud to store authentication data and perform heav...

In recent years, information technology has become a focus of attention. All hardware, software, and communication technologies are growing rapidly. Nowadays, we can’t live without technology. We use technology anywhere and anytime, and enjoy the convenience of technology. In particular, all kinds of network services and applications. These communi...

Digital rights management (DRM) systems are access control technologies used to restrict the use, modification, and distribution of protected digital contents. The success of a DRM system relies heavily on a good user authentication mechanism, and user identity verification through biometric information check is a great idea in that the biological...

Three-party authenticated key exchange (3PAKE) protocol allows two communication users to authenticate each other and to establish a secure common session key with the help of a trusted remote server. Recently, Farash and Attari propose an efficient and secure 3PAKE protocol based on Chebyshev chaotic maps and their protocol is supported by the for...

Background and objective: With the rapid development of wireless communication technologies and the growing prevalence of smart devices, telecare medical information system (TMIS) allows patients to receive medical treatments from the doctors via Internet technology without visiting hospitals in person. By adopting mobile device, cloud-assisted pl...

With the rapid development of information science and network technology, Internet has become an important platform for the dissemination of digital content, which can be easily copied and distributed through the Internet. Although convenience is increased, it causes significant damage to authors of digital content. Digital rights management system...

The proxy blind signature scheme (PBSS), allows the authorized proxy signer to use his proxy private key to create a legal blind signature on behalf of original signer. Recently, Alghazzawi, Salim and Hasan (A-S-H), presented the elliptic curve cryptography (ECC) based PBSS. However, we found their scheme is vulnerable to a linkability attack, whic...

The use of radio frequency identification (RFID) in Internet of things (IoT) has led to a significant progress in numerous intelligent devices. However, due to its restrictions on computation ability, storage space and battery capacity, RFID-based IoT system has to confront with various security and efficiency challenges. Recently, a lightweight RF...

Secure three party node authentication and key establishment scheme for data exchange in the Internet of Things (IoT) applications enables two resourceconstrained nodes to establish a secure end-to-end communication channel with the help of a data server. Since node in IoT have constraints on resources such as power, memory space and computation ab...

With the rapid development of wireless communication technologies, mobile networks will enable users to use personal mobile devices to access various network information services at anytime and anyplace. Recently, Lu et al. proposed a dynamic ID based mutual authentication and key agreement scheme using elliptic curve cryptography (ECC) which attem...

The advancement of public-key cryptography in recent years has offered strong background support for the invention of numerous new system applications vastly employed in electronic business as well as other fields. However, that does not change the fact that the one-and-only Internet still remains open and unprotected. Therefore, for the sake of in...

In recent years, with the increase in degenerative diseases and the aging population in advanced countries, demands for medical care of older or solitary people have increased continually in hospitals and healthcare institutions. Applying wireless sensor networks for the IoT-based telemedicine system enables doctors, caregivers or families to monit...

Multi-proxy signature (MPS) scheme makes a very important branch of the proxy signature scheme family, as they are applicable in many practical situations. The MPS scheme enables the actual signer to pass on their signing authority to plural proxy signers, where each proxy/delegated signer should contribute together to create a genuine MPS to make...

Nowadays users can access various online services and resources from distributed information systems remotely via Internet or other public networks. However, remote online systems are vulnerable to many security attacks due to they are built on public networks. Therefore it is necessary to design an authentication scheme for securing network commun...

Recently, Chiou et al. proposed a secure authentication scheme which not only ensures message confidentiality and patient anonymity but also provides real telemedicine system implementation. However, in this paper, we found that Chiou et al.’s telemedicine scheme has some security weaknesses such as (1) it fails to protect the confidentiality of pa...

Recently, Wu et al. proposed a secure channel free searchable encryption (SCF-PEKS) scheme which not only can guard against keyword guessing and record disclosure attacks but also can provide much better performance than other related scheme for shareable EMRs. However, in this paper, we demonstrated that Wu et al.’s SCF-PEKS scheme has some design...

Recently, the sport of mountaineering is a popular leisure activity and many people may injure while mountaineering. In the year of 2014, Chen et al. suggested a cloudbased emergency response and SOS system for mountaineering travelers when they encounter dangers. Chen et al. claimed that their proposed system is secure against various known attack...

Password authenticated key agreement protocol allows users to use an easy-to-remember password and establish a secure session key with the help of a trusted server. Recently, Farash and Attari proposed an improved key agreement protocol based on chaotic maps and they pointed out that Gong et al.'s protocol is vulnerable to stolenverifier attack and...

In the last decade, the technology of Radio Frequency Identification (RFID) has boomed in the wireless communication environment. Applications of RFID have matured and reached far into various fields such as smart building, healthcare, supply chain management, etc. However, along with the rapid advancement of RFID systems have come many security is...

The convertible authentication encryption (CAE) scheme, enables the signatory to send a secret message and its associated signature to a designated receiver. If some dispute happens, then the receiver has the ability to get ordinary signature by converting the ciphertext signature. The receiver can solely perform this signature conversion without a...

The Convertible Authentication Encryption (CAE) scheme, allows the signer to generate an authentic ciphertext signature, which can be recuperated and validated by a specific recipient only. In case of any kind of dispute the recipient is capable enough to convert the ciphertext signature as a normal signature and that can be validated publicly. The...

As cloud technologies thrive, researches in the field of cloud storage have switched their focus from encryption-decryption techniques that help data owners protect their privacy and data confidentiality to the application of searching techniques on encrypted data while maintaining high level security and privacy of outsource data. To begin with, S...

Secure user authentication schemes in many e-Healthcare applications try to prevent unauthorized users from intruding the e-Healthcare systems and a remote user and a medical server can establish session keys for securing the subsequent communications. However, many schemes does not mask the users' identity information while constructing a login se...

Recent advances in medical treatment and emergency applications, the need of integrating wireless body area network (WBAN) with cloud computing can be motivated by providing useful and real time information about patients’ health state to the doctors and emergency staffs. WBAN is a set of body sensors carried by the patient to collect and transmit...

A multi-server environment helps the users to register at the registration center once and can gain numerous network services and resources provided by remote application servers. In order to protect sensitive data from unauthorized disclosure, to authenticate the identities of network participants, and to preserve user anonymity, many chaotic maps...

Handling huge loads of data that are subject to change within every second, cloud storage services are facing the challenge of properly dealing with the problem of user legality management while making sure that the services are conveniently user-friendly. Ideally, the concept of attribute-based encryption should be applied, meaning that data shoul...

Remote user authentication has been widely used in the integrated electronic patient record information system (EPRIS) to protect the security and integrity of communication sessions between the login user and the medical server. Recently, Wen 17 presented the user authentication and user anonymity scheme based on the quadratic residues and claimed...

With the growing popularity of network technologies, cloud-based health care applications are becoming an essential part of telecare medical information systems have been widely studied in recent years. To protect patient privacy and restrict the access of precious services for legal privileged participants only, many secure medical data exchange p...

Due to the rapid growth of computer networks and service providing servers, many network environments have been becoming multi-server architecture and various multiserver authentication protocols have been proposed. In such an environment, a user can obtain different network services from multiple network servers without repeating registration to e...

To protect patient privacy and ensure authorized access to remote medical services, many remote user authentication schemes for the integrated electronic patient record (EPR) information system have been proposed in the literature. In a recent paper, Das proposed a hash based remote user authentication scheme using passwords and smart cards for the...

Radio Frequency Identification (RFID) based solutions are widely used for providing many healthcare applications include patient monitoring, object traceability, drug administration system and telecare medicine information system (TMIS) etc. In order to reduce malpractices and ensure patient privacy, in 2015, Srivastava et al. proposed a hash based...

In this paper, we propose an extended chaotic maps-based keyword search scheme over encrypted data resist outside and inside keyword guessing attacks in cloud storage services, which achieves the essential requirements of a secure cloud storage service. A secure cloud storage service has to satisfy five security requirements: consistency, ciphertex...

With the purpose of accessing numerous network resources and services with user anonymity, various dynamic identity (ID)-based user authentication schemes have been proposed. Recently, Khan et al. have pointed out the security weaknesses of the dynamic ID-based user authentication scheme of Wang et al. and proposed an improved version of dynamic ID...

In order to guarantee secure communications in cloud storage service, we integrated the concept of session key establishment and extended chaotic maps into our proposed method which aims to allow data senders and data receivers to establish a secure common session key through a trusted cloud server over an insecure channel when they wish to share t...

With the growing popularity of network applications, multi-server architectures are becoming an essential part of heterogeneous networks and numerous security mechanisms have been widely studied in recent years. To protect sensitive information and restrict the access of precious services for legal privileged users only, smart card and biometrics b...

Three-party Password-based Authentication Key Exchange (3PAKE) allows a trusted server to assist two users to establish a common session key. Recently, Wu et al. pointed out that Chang et al.'s 3PAKE was vulnerable to the off-line guessing attack and proposed an improved 3PAKE to fix the problem. However, we found that Wu et al.'s protocol is still...

Three-party-authenticated key agreement allows two users to establish a common session key through a trusted server via an insecure communication channel. Early authenticated key agreement schemes were mostly based on either pairing operations, hash operations, or modular exponentiation operations. In 2011, Wang and Zhao took a new path and built t...

Telecare medicine information system (TMIS) is widely used for providing a convenient and efficient communicating platform between patients at home and physicians at medical centers or home health care (HHC) organizations. To ensure patient privacy, in 2013, Hao et al. proposed a chaotic map based authentication scheme with user anonymity for TMIS....

With the growing popularity of cloud computing, cloud storage service becomes an essential part of cloud services and numerous researches have been widely studied in recent years. Recently, Hsu et al. proposed an ElGamal-based simple keyword search scheme over encrypted data in cloud storage services. They claimed that a secure cloud storage servic...

DTV services are getting widespread use, requiring service providers to have effective methods for remotely configuring and managing DTV set-top boxes (STBs). Solutions for such remote management are becoming standards-based. In this paper, we first propose a secure frequency billing service in DTV broadcasting. The billing system can provide users...

In this paper, we show the cryptanalysis of Chen's smart card based remote user authentication scheme, recently proposed by Chen, Hsiang and Shin, that is designed to provide users with secure activities over insecure networking environments. We show that Chen et al.'s scheme has potential security vulnerabilities, which enable malicious attackers...

Three-party key exchange protocol is one of the most essential cryptographic technique in the secure communication areas. In this protocol, two clients, each shares a human-memorable password, working with a trusted server, can agree a secure session key. Recently, Lu and Cao proposed a new simple three-party key exchange S-3PAKE protocol and claim...

As the era of pervasive and ubiquitous computing comes close, hand-held and smart devices are expected to achieve the dream of all time everywhere computing. Remote user authentication is important to verify the legitimacy of a login user over an insecure communication channel. Furthermore, in order to protect user privacy such that others cannot t...

As information technology continuously progresses, more applied technologies are developed, such as radio frequency identification (RFID). In this paper, we propose a novel digital television (DTV) structure that uses RFID for encryption. RFID is widely used for various applications because of its advantages such as an extended lifetime and securit...

Recently, Lee, Lin and Tsai proposed an authenticated group key agreement protocol in a mobile environment based on the security of bilinear pairings. They proved the security of the protocol under the bilinear computational Diffie-Hellman assumption. They also proved their protocol is a contributory group key agreement protocol in which participan...

Wireless sensor networks (WSNs) can be quickly and randomly deployed in any harsh and unattended environment and only authorized users are allowed to access reliable sensor nodes in WSNs with the aid of gateways (GWNs). Secure authentication models among the users, the sensor nodes and GWN are important research issues for ensuring communication se...

In this paper, we propose a scheme utilizing three-party password-based authenticated key exchange protocol with user anonymity using extended chaotic maps, which is more efficient and secure than previously proposed schemes. In order to enhance the efficiency and security, we use the extended chaotic maps to encrypt and decrypt the information tra...

With the rapid development of wireless and mobile communication techniques, Wireless Sensor Networks (WSNs) have attracted great attention in recent years and have been widely used in practical applications, such as monitoring of ocean tsunami, detection of battlefield environment, entrance guard system, medical or science areas and even in our hom...

Due to the rapid development and growth of computer networks, there have been greater and greater demands for remote password authentication protocols. Recently, the focus has been on protocols for multiserver environments that run on smart cards. These protocols typically count on the nonce or timestamp to provide protection against the replay att...

Password authentication has been widely used in computer networks to provide secure remote access control. In this study, the authors show that the improved password authentication and update scheme based on elliptic curve cryptography proposed by Islam and Biswas is vulnerable to offline password guessing, stolen-verifier and insider attacks. We p...

With the explosive growth of computer networks, many remote service providing servers and multi-server network architecture are provided and it is extremely inconvenient for users to remember numerous different identities and passwords. Therefore, it is important to provide a mechanism for a remote user to use single identity and password to access...

Greylisting and real-time block listing are two common mechanisms for spam filtering. The former can efficiently reduce the number of spam sessions, but can be easily evaded if spammers retry spam delivery within a period of time. The latter can detect and reject the clients with poor reputation during SMTP sessions by looking up an external blackl...

Remote password authentication has been widely used in network systems and it aims to provide secure remote access control. In 2013, Li proposed a novel password authentication scheme based on elliptic curve cryptography and smart card [17]. However, we found that Li’s authentication scheme has a serious security problem in that all registered user...

Two-factor user authentication is an important research issue for providing security and privacy in hierarchical wireless sensor networks (HWSNs). In 2012, Das, Sharma, Chatterjee and Sing proposed a dynamic password-based user authentication scheme for HWSNs. In this paper, we show weaknesses of Das et al.'s scheme such as failing to prevent user...