Public Channel Research Articles

Speech encryption algorithm based on two newly designed chaotic maps

Two new integrated chaotic maps are designed. The sine and logistic maps are used to create a sine-logistic integrated map (SLIM). The sine and cubic maps are used to design a sine-cubic integrated map (SCIM). Their dynamical analyses are done using time series plots, 0–1 tests, bifurcations, sample entropy, and Lyapunov exponent diagrams. The newly designed chaotic maps exhibit their dynamical properties of a period-two cycle, period-four cycle, and chaos. The speech signal is compressed first, and encryption is performed based on the new integrated chaotic maps. The two keys, such as key-A and key-B, are generated using SLIM and SCIM, respectively. Key-A is used for the shifting operation, while the bitwise XOR operation is carried out between the compressed-shifted speech signal and key-B. After that, the encrypted speech is sent across a public channel, and the original speech is recovered by performing reverse operations on the receiving end. The degree of security is measured using various speech security and attack analysis tools. It is found that the proposed strategy is more secure than some existing methods described in the literature and can withstand several attacks.

A computational analysis of Telegram's narrative affordances.

This paper offers an empirical investigation of the narrative profiles afforded by public, one-way messaging channels on Telegram. We define these narrative profiles in terms of the contribution of messages to a thread of narrative continuity, and test the double hypothesis that 1) Telegram channels afford diverse narrative profiles, corresponding with distinct vernacular uses of the platform's features, and that 2) networks of Telegram channels sampled from thematically distinct seed channels lean towards distinct profiles. To this end, we analyse the textual contents of 2,724,187 messages from 492 public messaging channels spanning five thematic networks. Our computational method builds up the narrative profiles by scrolling down channels and classifying each message according to its narrative fit with the surrounding messages. We thus find that Telegram channels afford several distinct storytelling profiles, which tend to defy traditional notions of narrative coherence. We furthermore observe correspondences between the thematic orientations of channels and their narrative profiles, with a preference for disparate profiles in channels pertaining to conspiracy theories and far-right counterculture, a preference for coherent profiles in channels pertaining to cryptocurrencies, and mixed types in channels pertaining to disinformation about the war in Ukraine. These empirical observations thus inform our further theorization on how platform features allow users to construct and shape narratives online.

Subnoise optical covert communication based on amplified spontaneous emission light.

Amplified spontaneous emission (ASE) light is a common noise in optical communication systems with optical amplification, and a suitable optical carrier for optical covert communication. To deeply covert the secure signal, an in-band subnoise optical covert communication scheme is proposed and demonstrated by a proof-of-concept experiment. The power spectral density of optical secure channel is 10 dB less than the optical noise in the public channel. The covert signal is hidden in both optical and electrical domain, and can be transmitted with error-free. The trade-off between covertness and availability is discussed.

Emancipation from the burdens of scholarly publishing – the diamond alternative of the JYU Studies

Scholarly publishing is determined and guided by the questionable and artificial prestige of publication channels that are also falsely used for assessing the research and the researchers. This steers researchers to publish their papers in the same publication channels as others do, and many relevant channels are seen as less valuable.While publishing is focused on certain journals and publishers, open access publishing is increasingly concentrated on fee-based channels, where authors are obligated to pay publishing fees (article processing charges, APC and book processing charges, BPC) just to get their research published in open access. This places a burden for researchers to get funding for publishing; it creates inequality between the researchers with funding and those without it, and it increases the costs for universities and other research organizations. (See e.g., Klebel & Ross-Hellauer 2023.) At the same time the academic community has gone further from the very principles of open science, such as the attempts to control the increasing costs of scientific publications and the aims to improve the equality of researchers and other people in need of science. Diamond OA as a realistic alternativeOpen scholarly publishing should be funded in another way than by charging publication fees from individual authors or their institutions.Promoting Diamond OA should be seen as part of a larger change in the services and practices of scholarly publishing. The whole global academic community and research service providers should be engaged in this change. The current OA diamond landscape needs to be built as a community that will support diversity and include a wide range of different academic communities in different languages (see Becerril et. al., 2021).Research communities such as learned societies and research organizations could take more control of scholarly publishing. While universities are now advancing responsible research assessment (see CoARA), maybe it's time to also reconsider the more active andresponsible role of the universities in reforming the scholarly publishing sector.Case JYU Studies - open monographs with agile servicesJYU Studies is a fresh peer-reviewed monograph series for research affiliated with the University of Jyväskylä. We found a demand for an alternative publishing channel for peer- reviewed monographs with the Diamond OA model. The Open Science Centre of the University and the editorial board manage the series and the publishing process. The editorial work and publishing are funded by the Open Science Centre. Close and agile cooperation with the departments of the University and the authors is key to all successful publishing processes.• The peer-review process is implemented openly, so the authors and the reviewers are aware of each other’s identities.• We offer alternatives for publishing formats (such as Omeka S and EPUB) and develop publishing services in an agile way.• Our publishing services cooperate closely with our university researchers and listen to their thoughts and ambitions for publishing.• The publishing services include communication and marketing planning in cooperation with the authors striving to reach the best possible visibility for the publication.• We also offer the authors a reporting service showing the usage and visibility of publications (e.g., downloads, citations). This way, the publishing service continues after the publication, and the authors get interesting information about the visibility and impact of their publication.All monographs in JYU Studies are deposited in the University of Jyväskylä repository, JYX, which is an essential infrastructure for research and education at the university. Publishing in an open repository with high-quality metadata and registered DOI identifiers ensures that monographs are indexed in relevant databases.

The Impacts of Short Videos on Marketing Strategies in the Tourism Industry: Take Xinjiang as an Example

With the development of technology, the short video industry has gradually emerged, the traditional media industry can no longer meet the needs of various industries, the more intuitive content in short videos can better attract people's attention; at the same time, the short video viewing does not take up too much of people's time, people can more directly understand the meaning of its expression. This is why more and more people in the industry are choosing to take advantage of the rise of the short video industry to market and promote themselves. Tourism is one of these industries. Tourist attractions take advantage of short videos in order to promote the characteristics of the scenic spots in a more graphic way and to achieve a precise marketing strategy. In this paper, this paper uses Xinjiang as an example, and through literature analysis, mainly studying the changes in the marketing strategy of the tourism industry due to the rise of short videos and the impact it has on the tourism industry. This leads to three innovative strategies suitable for the marketing and promotion of tourism in Xinjiang: improving the authenticity of the video content, enriching the marketing means and expanding the publicity channels and improving the tourism industry chain, which provide implications for the marketing of tourism in Xinjiang.

Perlindungan Hukum Terhadap Warga Negara Indonesia Atas Tuduhan Penyebar Hoax Covid-19 Ditinjau Dari Perspektif Hak Asasi Manusia

Information technology plays a crucial role in the modern era. The rapid advancement of information technology has various complex implications for daily human activities. However, despite the positive impact of the increasing number of internet users on human life, there are also negative consequences that can harm individuals, society, and the country. Currently, Indonesia is facing the widespread coronavirus outbreak, with its origin still unknown. This new disease, known as Covid-19, is highly dangerous as it can quickly transmit from one human to another and even through environmental objects. Regarding the dissemination of false information or hoaxes, it is important to address statements made by government officials and elites that tend to downplay or suggest that Indonesia is immune to virus attacks, or the dissemination of baseless information. Such statements contradict the obligation to provide accurate information as stipulated in various regulations, such as Article 154 Jo. 155 of Law no. 36 of 2009 concerning Health. Regrettably, in light of the events observed in this study, concerns about the spread of hoaxes are not accompanied by efforts to establish reliable and comprehensive communication and public information channels from the government.

AuCFSR: Authentication and Color Face Self-Recovery Using Novel 2D Hyperchaotic System and Deep Learning Models.

Color face images are often transmitted over public channels, where they are vulnerable to tampering attacks. To address this problem, the present paper introduces a novel scheme called Authentication and Color Face Self-Recovery (AuCFSR) for ensuring the authenticity of color face images and recovering the tampered areas in these images. AuCFSR uses a new two-dimensional hyperchaotic system called two-dimensional modular sine-cosine map (2D MSCM) to embed authentication and recovery data into the least significant bits of color image pixels. This produces high-quality output images with high security level. When tampered color face image is detected, AuCFSR executes two deep learning models: the CodeFormer model to enhance the visual quality of the recovered color face image and the DeOldify model to improve the colorization of this image. Experimental results demonstrate that AuCFSR outperforms recent similar schemes in tamper detection accuracy, security level, and visual quality of the recovered images.

How channels of knowledge acquisition affect farmers’ adoption of green agricultural technologies: evidence from Hubei province, China

ABSTRACTFarmers’ adoption of green agricultural technologies (GATs) could reduce the negative environmental impacts of traditional agriculture in China. Despite the benefits of GATs, their adoption rate has not been high. While previous studies have examined the information and communication technologies that influence the adoption of GATs, most have selected only one of the GATs and have not distinguished between public and private channels of knowledge acquisition. In this paper, based on a sample of 732 rural households from Hubei Province, we used a negative binomial model to examine the role of knowledge acquisition channels on GATs adoption. Overall, we found that radio and the government (through its face-to-face channels) are positively associated with farmers’ adoption of GATs; however, farmers adopted more GATs when they had acquired knowledge from the government than from radio. A possible explanation and a policy implication is that direct communication with farmers and practical demonstration of the benefits of GATs are preferred to passive reception of information.

Knowledge Mapping of Global Status and Trends for Thromboangiitis Obliterans: A Bibliometrics and Visual Analysis.

Thromboangiitis obliterans (TAO) is a segmental nonatherosclerotic inflammatory vascular disease characterized by recurrent progressive inflammatory reactions and thrombosis in the small and medium-sized arteries and veins of the extremities. However, there are few bibliometric studies on TAO. Therefore, this study was employed to generalize the research status, hotspots and development trends of TAO-related research. The data from 1999 to 2022 were collected from the Web of Science core collection database, and analyzed through bibliometrics software. VOSviewer was utilized to carry out academic collaboration between different countries/regions, institutions, and authors, visualization map of co-cited authors, journals, reference, and co-occurring keywords. CiteSpace was used to analyze the dual-map of journals, keyword bursts, and timeline of keywords. Bar and pie charts in this study were statistically analyzed and graphed through Microsoft Excel 2021. Scimago Graphica was applied to map the academic collaboration between different countries/regions. A total of 553 literatures were involved in this study. Japan at the leading global position not only in the number of publications, but also total citations, average citations and H-index. Institution with the major contribution to TAO research is Mashhad University of Medical Sciences, and Nagoya University. Annals of Vascular Surgery, Angiology, Journal of Vascular Surgery are the main publication channel for articles related to TAO. Fazeli, B., Iwai, T., and Kihara, Y. are major contributors in this field. The studies on TAO keywords could be grouped into four clusters: Etiology, Mechanism, Cell therapy and Clinical therapy. Although the number of TAO publications has fluctuated over the past 20 years, it has generally shown a steady upward trend. Etiology and treatment research on TAO and some keywords such as trail, therapy, outcome, management, stem cells, angioplasty, and activation will become a hot spot in the future.

Robust steganography in practical communication: a comparative study

To realize the act of covert communication in a public channel, steganography is proposed. In the current study, modern adaptive steganography plays a dominant role due to its high undetectability. However, the effectiveness of modern adaptive steganography is challenged when being applied in practical communication, such as over social network. Several robust steganographic methods have been proposed, while the comparative study between them is still unknown. Thus, we propose a framework to generalize the current typical steganographic methods resisting against compression attack, and meanwhile empirically analyze advantages and disadvantages of them based on four baseline indicators, referring to as capacity, imperceptibility, undetectability, and robustness. More importantly, the robustness performance of the methods is compared in the real application, such as on Facebook, Twitter, and WeChat, which has not been comprehensively addressed in this community. In particular, the methods modifying sign of DCT coefficients perform more superiority on the social media application.

Generation of random sequences using DNA cryptography for OTP encryption

DNA cryptography is considered as a promising new field for improving cybersecurity and privacy using parallelism and storage capacity of DNA molecules. In this work, novel technique is proposed for generating random and unpredictable keys for symmetric One Time Pad cryptosystems. To achieve this, publicly available DNA sequences stored in genetic databases are used as a source of inherently random, diverse, and variable-length sequences. The proposed approach is based on two steps. The first step uses a DNA self-assembly structure, mathematical operations and DNA techniques. In the second step, an entropy source and chaotic function are incorporated as a random number generator and pseudorandom number generator, respectively, to further enhance the randomness and unpredictability of the generated OTP keys. Additionally, a secure key exchange approach is also proposed including minimization and optimization in both secure and public channels used for key exchange.

Lightweight Authentication Scheme for Healthcare With Robustness to Desynchronization Attacks

Remote healthcare monitoring systems are gaining a lot of interest as they enable doctors to use public channels to get real-time data from the sensors placed in/on the patient’s body. This necessitates the implementation of a robust authentication scheme to ensure secure communication between trusted healthcare providers and sensors which are usually low in resources. To address these issues, in 2021, Masud et al. presented a lightweight anonymous user authentication scheme for securely obtaining patient’s real-time data. Their protocol is considered practical for deployment on sensor nodes as it only utilizes hash functions and does not require any public key cryptography. In this work, we demonstrate how their protocol loses synchronization when a message is blocked/jammed and how in some scenarios, the protocol is exposed to the risk of session key disclosure and cannot ensure forward secrecy. To overcome these threats, we propose, a Lightweight mutual Authentication Protocol that provides Robustness to Desynchronization attacks. The proposed scheme uses a one-way hash chain technique to ensure forward secrecy and enable resynchronization between the protocol entities in the event of a desynchronization attack. also achieves user and sensor node anonymity, thus ensuring privacy of the communicating entities. With the demonstration of both formal and informal analysis, the proposed protocol is ensured to withstand the identified attacks in Masud et al.’s scheme. The comparative analysis in terms of security and performance with relevant protocols indicates that the proposed protocol ensures higher security with considerably low computation and communication overheads, making it suitable for practical implementation in a lightweight healthcare environment.

Kunigaikščio Margirio pėstininkų bataliono veiklos viešinimo socialiniuose tinkluose analizė

The article analyses the publicity of the activities of the statutory organization in social networks. The theoretical part discusses the concept of activity publicity, the concept of social networks, introduces the activities of the Lithuanian army and the regulation of its publicity. Empirical qualitative research revealed that the activities of the Duke Margiris Infantry Battalion are publicized on Facebook and Instagram. The collected public posts were analysed according to three criteria: the number of likes, comments and shares of the posts. According to the content of the posts, four themes were distinguished: "combat training", "commemorations/formations", "civic education" and "visits". The obtained research results imply recommendations: in the case of the possibility of providing more visual content in the posts; to use the functions of the social network Facebook to create messages about upcoming events ("event", "story") and to remind about upcoming events by sharing messages. Keywords: publicity of military activities, publicity channels and means, social networks, publicity content and methods, feedback.

Social protection ‘from below’: micro traders and their collective associations in Tanzania

ABSTRACT This article explores the social protection coverage, needs, and preferences of informal micro traders in Tanzania. In particular, it examines the social protection models implemented ‘from below’ by traders’ own collective associations. Using original survey and interview data, the paper shows how social protection offered by public channels often suffers from a narrow scope and fails to correspond with the key challenges experienced by informal traders. In contrast, social protection models ‘from below’ implemented by the traders’ own associations, are directed towards timely, flexible, but also limited cushioning against multiple relevant needs. While they help manage the implications of precariousness rather than challenging their causes, they nonetheless illustrate a format closer attuned to the needs and realities of informal micro traders. Hence, this paper calls for a broadening of both academic and policy discussions in the field of social protection from the current narrow focus on formal schemes only.

Anonymous Lightweight Authenticated Key Agreement Protocol for Fog-Assisted Healthcare IoT System

The impact of fog-assisted Healthcare IoT (H-IoT) system is immense. The smart H-IoT equipments can upload healthcare information to fog nodes with low latency and high mobility. To facilitate secure interactions among three parties, including smart H-IoT equipments, fog nodes and a cloud server, over the public and insecure channels, a few authenticated key agreement (AKA) protocols are proposed. However, existing works are constructed based on expensive cryptographic primitives (e.g., bilinear pairing), which lead to high computation costs. Besides, the anonymity of H-IoT users is failed to be provided. To tackle these issues, an anonymous and lightweight three-party AKA protocol ALAKAP is proposed, which leverages an efficient cryptographic primitive (i.e., Chebyshev chaotic map operation) to generate a shared session key among three parties and achieve security (anonymity and other six properties) and efficiency simultaneously. It then formally proves the security of ALAKAP under the broadly accepted Burrows-Abadi-Needham (BAN) logic model and demonstrates how the proposed protocol satisfies the desired requirements in the fog-assisted H-IoT system. Finally, the performance of ALAKAP is validated by conducting the experiments on Amazon EC2 and Raspberry Pi. The results show that our work can achieve at least 44% higher improvement than the state-of-the-art works.

GAN-based watermarking for encrypted images in healthcare scenarios

Nowadays, it is very common for healthcare professionals or staff to transmit digital data in the form of images over public channels or store it on hard drives or third-party clouds. However, unauthorised users and cloud-service providers may view or abuse these sensitive images. This research proposes a generative adversarial network (GAN)-based watermarking for encrypted images to prevent data leakage in healthcare scenarios. The technique uses a combination of a chaotic map and randomised singular value decomposition (RSVD) to encrypt the image first. Subsequently, a GAN model is developed for watermark generation by hiding multiple marks within an image. Later, the encrypted image is marked by embedding the generated watermark for copyright protection and authentication. This fundamentally solves the problem of copyright violation and privacy leakage of medical data. Experimental results have demonstrated that the proposed method is imperceptible and successfully resists various attacks. The obtained results confirmed the superiority of this method over other techniques, which makes it more suitable for healthcare applications.

Secure and Privacy-Preserving Authentication Scheme Using Decentralized Identifier in Metaverse Environment

The metaverse provides a virtual world with many social activities that parallel the real world. As the metaverse attracts more attention, the importance of security and privacy preservation is increasing significantly. In the metaverse, users have the capability to create various avatars, which can be exploited to deceive or threaten others, leading to internal security issues. Additionally, users attempting to access the metaverse are susceptible to various external security threats since they communicate with service providers through public channels. To address these challenges, we propose an authentication scheme using blockchain, a decentralized identifier, and a verifiable credential to enable metaverse users to perform secure identity verification and authentication without disclosing sensitive information to service providers. Furthermore, the proposed approach mitigates privacy concerns associated with the management of personal information by enabling users to prove the necessary identity information independently without relying on service providers. We demonstrate that the proposed scheme is resistant to malicious security attacks and provides privacy preservation by performing security analyses, such as AVISPA simulation, BAN logic, and the real-or-random (ROR) model. We also show that the performance of our proposed scheme is better suited for the metaverse environment by providing greater security and efficiency when compared to competing schemes.

α-Synchronization of a Class of Unbounded Delayed Inertial Cohen–Grossberg Neural Networks with Delayed Impulses

As an essential dynamic behavior, the synchronization of inertial Cohen–Grossberg neural networks (ICGNNs) has received considerable attention due to its successful applications in neural cryptography, public channel cryptography, security communications, and image encryption. In this article, the α-synchronization of a class of non-autonomous unbounded delayed inertial Cohen–Gossberg neural networks with delayed impulses is investigated. Firstly, several non-autonomous impulsive differential inequalities are established, where unbounded delays, delayed impulses, and time-variable coefficients are incorporated. Subsequently, based on the proposed impulsive differential inequalities and Lyapunov function approach, the feedback controllers are designed, and some criteria for α-synchronization are provided. Finally, the validity of the presented theoretical findings is demonstrated by two specific examples. It is shown that delayed impulses can be viewed as perturbations or stabilizing sources for non-autonomous ICGNNs.

Can You Ear Me?

The earlobe is a well-known location for wearing jewelry, but might also be promising for electronic output, such as presenting notifications. This work elaborates the pros and cons of different notification channels for the earlobe. Notifications on the earlobe can be private (only noticeable by the wearer) as well as public (noticeable in the immediate vicinity in a given social situation). A user study with 18 participants showed that the reaction times for the private channels (Poke, Vibration, Private Sound, Electrotactile) were on average less than 1 s with an error rate (missed notifications) of less than 1 %. Thermal Warm and Cold took significantly longer and Cold was least reliable (26 % error rate). The participants preferred Electrotactile and Vibration. Among the public channels the recognition time did not differ significantly between Sound (738 ms) and LED (828 ms), but Display took much longer (3175 ms). At 22 % the error rate of Display was highest. The participants generally felt comfortable wearing notification devices on their earlobe. The results show that the earlobe indeed is a suitable location for wearable technology, if properly miniaturized, which is possible for Electrotactile and LED. We present application scenarios and discuss design considerations. A small field study in a fitness center demonstrates the suitability of the earlobe notification concept in a sports context.

A Robust Privacy-Preserving ECC-Based Three-Factor Authentication Scheme for Metaverse Environment

Metaverse is revolutionizing the future iteration of technology with the potential to ameliorate efficiency and innovation drastically. It fashions engaging spaces for user interaction that simulate the real world by integrating augmented and virtual reality. Metaverse furnishes immersive interactive experiences, unrestricted time and space, visualizations, minimal learning costs, and endorses communication. A metaverse offers various services, such as virtual environments and avatars for telecommuting, education, and gaming. Yet, to access services, users must register with the server, where the registration requires user’s identity, password, and personal information. Additionally, the user interaction in metaverse is mediated through avatars over public channels, fabricating opportunities for security attacks such as replay and impersonation attacks. Consequently, we propose a secure mutual authentication scheme for safer user-server and avatar–avatar interactions utilizing Elliptic Curve Cryptography (ECC) and fuzzy extractor. The security of protocol is examined with Burrows–Abadi–Needham (BAN) logic, Real-or-Random (ROR) model, and Automated Validation of Internet Security Protocols Applications (AVISPA). We also conduct a comparative analysis of the computational and communication costs and the security features of proposed scheme with pre-existing works. Hence, the suggested protocol offers magnificent security and efficiency, making it suitable for the metaverse environment.