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13 pages, 8595 KiB

Open AccessArticle

Digital Customization for Product Design and Manufacturing: A Case Study within the Furniture Industry

by Athanasios Manavis, Prodromos Minaoglou, Nikolaos Efkolidis and Panagiotis Kyratsis

Electronics 2024, 13(13), 2483; https://doi.org/10.3390/electronics13132483 - 25 Jun 2024

Viewed by 1548

Abstract

Computational design together with the digitization of most fabrication processes play an important role in many research areas. Digital tools such as 3D modeling and computational design have been increasingly used. Computational design combines traditional 3D product design together with programming a general-purpose [...] Read more.

Computational design together with the digitization of most fabrication processes play an important role in many research areas. Digital tools such as 3D modeling and computational design have been increasingly used. Computational design combines traditional 3D product design together with programming a general-purpose CAD system in order to promote system integration. In essence, using CAD-based textual or visual programming languages a series of products can be designed with accuracy and take advantage of product customization and automation of downstream applications. The present paper aims at customizing furniture design based on automating both the design and the fabrication procedures. The customer is able to define a series of geometrical characteristics, i.e., width, length, internal dimensions, and various other properties. The outcome consists of automating a great deal of processes, i.e., 3D modeling and assembling, visualization, creating the bill of materials (BOM), producing assembly instructions for the user, drawings and prototyping files, weight estimation. Full article

(This article belongs to the Special Issue Advances in Software Engineering and Programming Languages)

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18 pages, 730 KiB

Open AccessArticle

SURE: Structure for Unambiguous Requirement Expression in Natural Language

by Franklin Parrales-Bravo, Rosangela Caicedo-Quiroz, Julio Barzola-Monteses, Leonel Vasquez-Cevallos, María Isabel Galarza-Soledispa and Manuel Reyes-Wagnio

Electronics 2024, 13(11), 2206; https://doi.org/10.3390/electronics13112206 - 5 Jun 2024

Cited by 1 | Viewed by 771

Abstract

This study presents three structures for clearly expressing functional requirements (FRs) and quantitative non-functional requirements (qt-NFRs). Expressing requirements with these structures will allow the understanding of requirements by stakeholders and software developers. The first structure is the SURE format, which is composed of [...] Read more.

This study presents three structures for clearly expressing functional requirements (FRs) and quantitative non-functional requirements (qt-NFRs). Expressing requirements with these structures will allow the understanding of requirements by stakeholders and software developers. The first structure is the SURE format, which is composed of three main sections: a title, a short definition, and a detailed description. The second proposed structure is a template to facilitate the definition of the title and description of unambiguous FRs. It is based on the application of CRUD operations on a certain entity, calling it the “CRUDE” structure. Finally, the third structure serves as a template to make it easier to clearly define the description and title of qt-NFRs. It is based on the application of system properties to computer events or actions, calling it the “PROSE” structure. In this, it is very important to specify those metric values that are desired or expected by the stakeholder. To know how much the definition of FRs and qt-NFRs improved when the proposed structures were used, 46 requirement specification documents elaborated as homework by students of the “Requirement Engineering” course offered at the University of Guayaquil between 2020 and 2022 were evaluated by five experts with more than 10 years of experience in software development for Ecuadorian companies. The findings showed that students reduced the percentage of unambiguous FRs and qt-NFRs from over 80% to about 10%. In conclusion, the findings demonstrate how crucial the three structures proposed in this paper are to helping students develop the ability to clearly express requirements. Full article

(This article belongs to the Special Issue Advances in Software Engineering and Programming Languages)

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19 pages, 1897 KiB

Open AccessArticle

Integration and Implementation of Scaled Agile Framework and V-Model in the Healthcare Sector Organization

by Marcela Pavlíčková, Andrea Mojžišová, Zuzana Bodíková, Richard Szeplaki and Marek Laciak

Electronics 2024, 13(11), 2051; https://doi.org/10.3390/electronics13112051 - 24 May 2024

Cited by 1 | Viewed by 1235

Abstract

The development of medical technology devices leads to the introduction and use of agile methods, which enable the delivery of increasingly complex software with the fastest possible innovations. Delivery of the highest quality software must be considered during development, as medical products are [...] Read more.

The development of medical technology devices leads to the introduction and use of agile methods, which enable the delivery of increasingly complex software with the fastest possible innovations. Delivery of the highest quality software must be considered during development, as medical products are important elements in saving human lives. Their development begins with determining a set of product requirements that exactly correspond to it. The development of specified medical products is finally delivered to the customer, who participates in the development. In this article, we present the use and combination of agile methods in software development, which correct and facilitate timely and continuous delivery of products. They also know how to smooth out a quick reaction to the customer’s changing needs and mainly focus on team management and communication. Specific agile methods make it possible to implement development through gradual improvements by integrating customer requirements towards the product. This article identifies three interconnected approaches to integrating agile methods and principles: SCRUM, SAFe, and Kanban combined with the V-model. The methods are gradually analysed based on the literature review, and the article presents a practical application in Siemens Healthcare Slovakia. Full article

(This article belongs to the Special Issue Advances in Software Engineering and Programming Languages)

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22 pages, 1331 KiB

Open AccessArticle

Assessing System Quality Changes during Software Evolution: The Impact of Design Patterns Explored via Dependency Analysis

by Kuo-Hsun Hsu, Hua-Chieh Szu-Tu and Chia-Hsing Tsai

Electronics 2024, 13(8), 1444; https://doi.org/10.3390/electronics13081444 - 11 Apr 2024

Viewed by 957

Abstract

Design patterns provide solutions to recurring problems in software design and development, promoting scalability, readability, and maintainability. While past research focused on the utilization of the design patterns and performance, there is limited insight into their impact on program evolution. Dependency signifies relationships [...] Read more.

Design patterns provide solutions to recurring problems in software design and development, promoting scalability, readability, and maintainability. While past research focused on the utilization of the design patterns and performance, there is limited insight into their impact on program evolution. Dependency signifies relationships between program elements, reflecting a program’s structure and interaction. High dependencies indicate complexity and potential flaws, hampering system quality and maintenance. This paper presents how design patterns influence software evolution by analyzing dependencies using the Abstract Syntax Tree (AST) to examine dependency patterns during evolution. We employed three widely adopted design patterns from the Gang of Four (GoF) as experimental examples. The results show that design patterns effectively reduce dependencies, lowering system complexity and enhancing quality. Full article

(This article belongs to the Special Issue Advances in Software Engineering and Programming Languages)

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17 pages, 806 KiB

Open AccessArticle

Statement-Grained Hierarchy Enhanced Code Summarization

by Qianjin Zhang, Dahai Jin, Yawen Wang and Yunzhan Gong

Electronics 2024, 13(4), 765; https://doi.org/10.3390/electronics13040765 - 15 Feb 2024

Viewed by 841

Abstract

Code summarization plays a vital role in aiding developers with program comprehension by generating corresponding textual descriptions for code snippets. While recent approaches have concentrated on encoding the textual and structural characteristics of source code, they often neglect the global hierarchical features, causing [...] Read more.

Code summarization plays a vital role in aiding developers with program comprehension by generating corresponding textual descriptions for code snippets. While recent approaches have concentrated on encoding the textual and structural characteristics of source code, they often neglect the global hierarchical features, causing limited code representation. Addressing this gap, our paper introduces the statement-grained hierarchy enhanced Transformer model (SHT), a novel framework that integrates global hierarchy, syntax, and token sequences to automatically generate summaries for code snippets. SHT is distinctively designed with two encoders to learn both hierarchical and sequential features of code. One relational attention encoder processes the statement-grained hierarchical graph, producing hierarchical embeddings. Subsequently, another sequence encoder integrates these hierarchical structures with token sequences. The resulting enriched representation is then fed into a vanilla Transformer decoder, which effectively generates concise and informative summarizations. Our extensive experiments demonstrate that SHT significantly outperforms state-of-the-art approaches on two widely used Java benchmarks. This underscores the effectiveness of incorporating global hierarchical information in enhancing the quality of code summarizations. Full article

(This article belongs to the Special Issue Advances in Software Engineering and Programming Languages)

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16 pages, 1903 KiB

Open AccessArticle

Positioning Improvement with Multiple GPS Receivers Based on Shallow Asymmetric Neural Network

by Che-Cheng Chang, Yee-Ming Ooi, Yu-Chun Chen and Jhe-Wei Lin

Electronics 2024, 13(3), 546; https://doi.org/10.3390/electronics13030546 - 29 Jan 2024

Viewed by 891

Abstract

A positioning system in a specific space is for the purpose of determining the location of an object. The Global Positioning System (GPS) is the most popular and valuable development for classical navigation. However, it may not always be precise and available due [...] Read more.

A positioning system in a specific space is for the purpose of determining the location of an object. The Global Positioning System (GPS) is the most popular and valuable development for classical navigation. However, it may not always be precise and available due to the effects of multi-path propagation and signal attenuation. Thus, we need some additional skills to keep its stability and accuracy or improve its performance. Based on the technique of neural networks, the positioning information from multiple GPS receivers is composed to obtain a better version which is more accurate and stable and thus can be applied to advanced applications. Particularly, the concepts of shallow and asymmetric neural networks are used in this work. Our design possesses fewer hidden layers via the former property and further reduces the connections of classical Fully Connected Neural Networks (FCNNs) via the latter property. Hence, it takes very little time to realize the training and predicting procedures. Also, it will help promote several works in practice, such as the implementation of embedded systems. Finally, a practical test, called the vehicular road test, is utilized to guarantee the level of confidence in the improvement of our algorithm. Full article

(This article belongs to the Special Issue Advances in Software Engineering and Programming Languages)

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23 pages, 5152 KiB

Open AccessArticle

A Reinforcement Learning Approach to Guide Web Crawler to Explore Web Applications for Improving Code Coverage

by Chien-Hung Liu, Shingchern D. You and Ying-Chieh Chiu

Electronics 2024, 13(2), 427; https://doi.org/10.3390/electronics13020427 - 19 Jan 2024

Cited by 1 | Viewed by 1425

Abstract

Web crawlers are widely used to automatically explore and test web applications. However, navigating the pages of a web application can be difficult due to dynamic page generation. In particular, the inputs for the web form fields can affect the resulting pages and [...] Read more.

Web crawlers are widely used to automatically explore and test web applications. However, navigating the pages of a web application can be difficult due to dynamic page generation. In particular, the inputs for the web form fields can affect the resulting pages and subsequent navigation. Therefore, choosing the inputs and the order of clicks on a web page is essential for an effective web crawler to achieve high code coverage. This paper proposes a set of actions to quickly fill in web form fields and uses reinforcement learning algorithms to train a convolutional neural network (CNN). The trained agent, named iRobot, can autonomously select actions to guide the web crawler to maximize code coverage. We experimentally compared different reinforcement learning algorithms, neural networks, and actions. The results show that our CNN network with the proposed actions performs better than other neural networks in terms of branch coverage using the Deep Q-learning (DQN) or proximal policy optimization (PPO) algorithm. Furthermore, compared to previous studies, iRobot can increase branch coverage by about 1.7% while reducing training time to 12.54%. Full article

(This article belongs to the Special Issue Advances in Software Engineering and Programming Languages)

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24 pages, 1269 KiB

Open AccessArticle

Resolving the Java Representation Exposure Problem with an AST-Based Deep Copy and Flexible Alias Ownership System

by Yung-Yu Zhuang, Wei Kuo and Shang-Chun Tseng

Electronics 2024, 13(2), 350; https://doi.org/10.3390/electronics13020350 - 14 Jan 2024

Viewed by 1238

Abstract

Encapsulation is a critical factor in object-oriented programming languages and design patterns. Nevertheless, programs written in languages like Java may encounter broken encapsulation due to the lack of sufficient supply for ownership and immutability. As a result, this paper introduces SlimeJava, an ownership [...] Read more.

Encapsulation is a critical factor in object-oriented programming languages and design patterns. Nevertheless, programs written in languages like Java may encounter broken encapsulation due to the lack of sufficient supply for ownership and immutability. As a result, this paper introduces SlimeJava, an ownership system extension based on abstract syntax trees and annotation utilization of Java that aims to help programmers prevent representation exposure. We show the features of the proposal with a motivating example using the Memento pattern. We then discuss how the utilization of annotations realizes ownership and why it is effective in avoiding representation exposure issues by comparing it with existing approaches. In the end, a quantitative performance evaluation was conducted to prove that SlimeJava does not cause a substantial overhead in execution time compared to native Java. Full article

(This article belongs to the Special Issue Advances in Software Engineering and Programming Languages)

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25 pages, 1253 KiB

Open AccessArticle

CMBMeTest: Generation of Test Suites Using Model-Based Testing Plus Constraint Programming and Metamorphic Testing

by M. Carmen de Castro-Cabrera, Antonio García-Dominguez and Inmaculada Medina-Bulo

Electronics 2024, 13(1), 18; https://doi.org/10.3390/electronics13010018 - 19 Dec 2023

Viewed by 1088

Abstract

Various software testing techniques have been shown to be successful in producing high-quality test suites for software where the code is not accessible (black-box approach). Nevertheless, no method has been found to guide combining some of these in a general way. In this [...] Read more.

Various software testing techniques have been shown to be successful in producing high-quality test suites for software where the code is not accessible (black-box approach). Nevertheless, no method has been found to guide combining some of these in a general way. In this study, a test suite generation method for black-box software called CMBMeTest was created to respond to these challenges. It employs several coupled software testing techniques, namely, model-based testing (MBT), constraint programming (CP), and metamorphic testing (MT). CMBMeTest provides step-by-step instructions for using the information available (such as program specifications, inputs and outputs) to create an initial test suite that covers the model obtained, using a combination of MBT and CP (referred to as MBT+CP). Furthermore, using the metamorphic relations (MRs) of MT, a better test suite was produced from that initial test suite. The method allows particular stages to be iterated to improve the results by building new models and new MRs. A comprehensive case study was conducted, employing CMBMeTest to produce encouraging results. Mutation testing was used to evaluate the test suite, and the first round produced a high mutation score. A more detailed model was used to repeat the process, with similar outcomes. Full article

(This article belongs to the Special Issue Advances in Software Engineering and Programming Languages)

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25 pages, 2029 KiB

Open AccessArticle

Design of an Online Programming Platform and a Study on Learners’ Testing Ability

by Nien-Lin Hsueh, Lien-Chi Lai and Wei-Hsiang Tseng

Electronics 2023, 12(22), 4596; https://doi.org/10.3390/electronics12224596 - 10 Nov 2023

Cited by 1 | Viewed by 1684

Abstract

Online judge (OJ) systems are essential in programming education as they efficiently evaluate learners’ programming skills and reduce instructor workload. However, these systems often overlook the importance of software-testing concepts. To address this gap, we developed a system called Pytutor that integrates software-testing [...] Read more.

Online judge (OJ) systems are essential in programming education as they efficiently evaluate learners’ programming skills and reduce instructor workload. However, these systems often overlook the importance of software-testing concepts. To address this gap, we developed a system called Pytutor that integrates software-testing concepts to assess learners’ programming abilities and proficiency by exploring students’ test cases and learning behaviors. Drawing on software engineering theory and practical techniques, test capabilities are evaluated by analyzing the code coverage and mutation testing of Defining Test Cases. Since our experiment is conducted in an online environment, we can collect students’ learning behaviors and further analyze the relationship between software engineering abilities and learning behaviors. We also analyzed the differences in programming and testing abilities between computer science majors and non-computer-science majors. Our findings suggest that better testing abilities may contribute to the improvement in programming abilities, whereas in the current Taiwanese education context, computer science majors do not necessarily have better testing abilities. This result provides suggestions for us to strengthen software-testing education no matter which type of students it is targeted at. Full article

(This article belongs to the Special Issue Advances in Software Engineering and Programming Languages)

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17 pages, 942 KiB

Open AccessArticle

Enabling Space-Aware Service Discovery Model in Home Networks through a Compatible Extension to mDNS/DNS-SD

by Chun-Feng Liao and Yu-Jou Weng

Electronics 2023, 12(18), 3885; https://doi.org/10.3390/electronics12183885 - 14 Sep 2023

Viewed by 1170

Abstract

The advent of the smart home, fueled by the rapid emergence of tiny embedded IoT devices and sensors, brings the consideration of space and location information to the forefront of service discovery. In a smart home environment, spaces often have composite capabilities and [...] Read more.

The advent of the smart home, fueled by the rapid emergence of tiny embedded IoT devices and sensors, brings the consideration of space and location information to the forefront of service discovery. In a smart home environment, spaces often have composite capabilities and complex structures. Since residents may have varying preferences based on their location within different spaces, traditional service discovery results may be suboptimal without considering the spatial context. This paper introduces a seamless approach to integrate space and location information with mDNS/DNS-SD, a widely utilized service discovery protocol in home networks. We provide a formal specification for this approach, develop a prototype, and perform a series of experiments to evaluate the efficacy and potential of the proposed method. Full article

(This article belongs to the Special Issue Advances in Software Engineering and Programming Languages)

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18 pages, 2481 KiB

Open AccessArticle

Agile Software Development and Reuse Approach with Scrum and Software Product Line Engineering

by Wen-Tin Lee and Chih-Hsien Chen

Electronics 2023, 12(15), 3291; https://doi.org/10.3390/electronics12153291 - 31 Jul 2023

Cited by 6 | Viewed by 4642

Abstract

Agile methods and software product line engineering (SPLE) are widely recognized as practical approaches for delivering high-quality software, adapting to evolving stakeholder needs, and tackling complex problems. This study proposes a hybrid agile software development and reuse approach called SPLE-Scrum based on the [...] Read more.

Agile methods and software product line engineering (SPLE) are widely recognized as practical approaches for delivering high-quality software, adapting to evolving stakeholder needs, and tackling complex problems. This study proposes a hybrid agile software development and reuse approach called SPLE-Scrum based on the activities of software product line engineering and Scrum. Within the SPLE process, we incorporate requirement engineering and design practices to create a reference architecture with reusable components called core assets by introducing a product management meeting. The core assets are reused to build a series of applications with various product lines. The product increments are delivered in each Sprint with the review and retrospective meetings based on Scrum lifecycle and practices. We present a case study involving a blockchain online store to demonstrate the practical application of SPLE-Scrum, highlighting the benefits of integrating Scrum and software product line engineering. The research hypotheses of the proposed approach were validated through a study of structured interviews with 5 experts and 44 software practitioners, showing that the key factors of product management, project requirements, and product architecture in the SPLE-Scrum approach have a beneficial impact on project success. The SPLE-Scrum approach provides valuable insights and practical guidance for organizations seeking to optimize their software engineering practices while incorporating agile development and software reuse capabilities. Full article

(This article belongs to the Special Issue Advances in Software Engineering and Programming Languages)

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17 pages, 398 KiB

Open AccessArticle

WHORU: Improving Abstractive Dialogue Summarization with Personal Pronoun Resolution

by Tingting Zhou

Electronics 2023, 12(14), 3091; https://doi.org/10.3390/electronics12143091 - 16 Jul 2023

Viewed by 1174

Abstract

With the abundance of conversations happening everywhere, dialogue summarization plays an increasingly important role in the real world. However, dialogues inevitably involve many personal pronouns, which hinder the performance of existing dialogue summarization models. This work proposes a framework named WHORU to inject [...] Read more.

With the abundance of conversations happening everywhere, dialogue summarization plays an increasingly important role in the real world. However, dialogues inevitably involve many personal pronouns, which hinder the performance of existing dialogue summarization models. This work proposes a framework named WHORU to inject external personal pronoun resolution (PPR) information into abstractive dialogue summarization models. A simple and effective PPR method for the dialogue domain is further proposed to reduce time and space consumption. Experiments demonstrated the superiority of the proposed methods. More importantly, WHORU achieves new SOTA results on SAMSum and AMI datasets. Full article

(This article belongs to the Special Issue Advances in Software Engineering and Programming Languages)

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16 pages, 8680 KiB

Open AccessArticle

A Study on the Security of Online Judge System Applied Sandbox Technology

by Jong-Yih Kuo, Zhi-Jia Wen, Ti-Feng Hsieh and Han-Xuan Huang

Electronics 2023, 12(14), 3018; https://doi.org/10.3390/electronics12143018 - 10 Jul 2023

Cited by 1 | Viewed by 1585

Abstract

The majority of programming courses currently employ online judge systems as lesson materials. Online judge systems are becoming more common as the number of courses and persons studying computer science and information engineering grows. At the same time, there is an increase in [...] Read more.

The majority of programming courses currently employ online judge systems as lesson materials. Online judge systems are becoming more common as the number of courses and persons studying computer science and information engineering grows. At the same time, there is an increase in the number of attacks against online judge systems; for example, Denial-Of-Service attacks, whose goal is to disrupt the target system by exhausting resources and blocking ordinary users from using the service normally. As a result, preventing attacks on online judge systems is becoming increasingly crucial. This research investigates and organizes these attack techniques, as well as develops a threat model for the online judge system by the STRIDE threat model approach, which provides a way to classify attacks into six categories. This research also designs code analysis rules and implements a code analysis tool. This tool can assist developers in analyzing the existing online judge system to determine whether the judge system is vulnerable to attack and dealing with vulnerability as soon as feasible to improve the judge system’s security. After enhancing the security of online judge systems, the system can foster trust and reliability among users as benefits. Full article

(This article belongs to the Special Issue Advances in Software Engineering and Programming Languages)

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24 pages, 5997 KiB

Open AccessArticle

Evaluation of a Smart Intercom Microservice System Based on the Cloud of Things

by Hsin-Yu Huang, Yong-Yi Fanjiang, Chi-Huang Hung, Hsing-Yu Tsai and Bing-Hong Lin

Electronics 2023, 12(11), 2406; https://doi.org/10.3390/electronics12112406 - 25 May 2023

Viewed by 1809

Abstract

This research migrates a monolithic smart intercom system to a microservice architecture, making the system more secure, stable, and scalable. The security mechanisms of the instant messaging platform are combined with microservices to improve the security of the system. The stability and performance [...] Read more.

This research migrates a monolithic smart intercom system to a microservice architecture, making the system more secure, stable, and scalable. The security mechanisms of the instant messaging platform are combined with microservices to improve the security of the system. The stability and performance of microservices are shown to be better than those of monolithic services through experimental tests. Residents can use different instant messaging software instead of the handset to improve the convenience of using this system. This system also implements community broadcasts, platform broadcasts, unit broadcasts, and family broadcasts to exchange messages across different instant messaging platforms. This paper proposes OpenAPI for other smart intercoms to integrate this system’s services and resources. In addition, this study deploys two microservice architectures using a native load balancer with a kube proxy and a service mesh load balancer with an istio proxy. Experiments were conducted during which residents tested the kube proxy and the istio proxy using stress testing tools on two microservice architectures, and the results showed that the kube proxy was slightly better than the istio proxy. Full article

(This article belongs to the Special Issue Advances in Software Engineering and Programming Languages)

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Review

Jump to: Research

15 pages, 975 KiB

Open AccessReview

Exploring Android Obfuscators and Deobfuscators: An Empirical Investigation

by Shouki A. Ebad and Abdulbasit A. Darem

Electronics 2024, 13(12), 2272; https://doi.org/10.3390/electronics13122272 - 10 Jun 2024

Viewed by 898

Abstract

Researchers have proposed different obfuscation transformations supported by numerous smartphone protection tools (obfuscators and deobfuscators). However, there is a need for a comprehensive study to empirically characterize these tools that belong to different categories of transformations. We propose a property-based framework to systematically [...] Read more.

Researchers have proposed different obfuscation transformations supported by numerous smartphone protection tools (obfuscators and deobfuscators). However, there is a need for a comprehensive study to empirically characterize these tools that belong to different categories of transformations. We propose a property-based framework to systematically classify twenty cutting-edge tools according to their features, analysis type, programming language support, licensing, applied obfuscation transformations, and general technical drawbacks. Our analysis predominantly reveals that very few tools work at the dynamic level, and most tools (which are static-based) work for Java or Java-based ecosystems (e.g., Android). The findings also show that the widespread adoption of renaming transformations is followed by formatting and code injection. In addition, this paper pinpoints the technical shortcomings of each tool; some of these drawbacks are common in static-based analyzers (e.g., resource consumption), and other drawbacks have negative effects on the experiment conducted by students (e.g., a third-party library involved). According to these critical limitations, we provide some timely recommendations for further research. This study can assist not only Android developers and researchers to improve the overall health of their apps but also the managers of computer science and cybersecurity academic programs to embed suitable obfuscation tools in their curricula. Full article

(This article belongs to the Special Issue Advances in Software Engineering and Programming Languages)

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