Management Information Systems, Management of Technology and Innovation, Information Systems, Computer Science Applications
6
Scopus Publications
61
Scholar Citations
4
Scholar h-index
2
Scholar i10-index
Scopus Publications
Cost and Performance Analysis on Decentralized File Systems for Blockchain-Based Applications: State-of-the-Art Report Aisyah Ismail, Mark Toohey, Young Choon Lee, Zhongli Dong, Albert Y. Zomaya Proceedings 2022 IEEE International Conference on Blockchain Blockchain 2022, 2022 Blockchain technology is an immutable append-only decentralized ledger that theoretically makes it an ideal data storage system. The nature of blockchain design ensures stored data is reliable, trustworthy, and transparent. However, the blockchain's full-replication feature makes it ineffective to store a large volume of data directly on-chain. This paper provides a systematic review and analysis of existing decentralized file systems. Our focus was on systems that can support large, high-frequency data writing while still providing swift and easy data retrieval for blockchain-based applications. The challenge, in our view, is to find ways to achieve those efficiency outcomes while still retaining the key decentralized features of blockchain design. With that in mind, we assessed the costs involved in using nine state-of-the-art decentralized file systems and we also considered their latency performance.
TRABAC: A Tokenized Role-Attribute Based Access Control using Smart Contract for Supply Chain Applications Aisyah Ismail, Qian Wu, Mark Toohey, Young Choon Lee, Zhongli Dong, Albert Y. Zomaya Proceedings 2021 IEEE International Conference on Blockchain Blockchain 2021, 2021 The use of smart contracts for access control has shown to be promising as it ensures integrity and governs access to stored data, thanks to blockchain's immutability. While several recent studies have shown such usage, their applicability to supply chain applications remains limited due to less governance control capability and implementation complexity with smart contracts. This paper proposes the use of a tokenized role-attribute based access control (TRABAC) as a two-level access control for supply chain applications. In particular, TRABAC combines the simplicity of Role-Based Access Control (RBAC) and the flexibility and fine-grained capacity of Attribute-Based Access Control (ABAC). We consider these methods coupled with the use of Non-Fungible Token (NFT) as virtual assets in the supply chain. We also define four roles or parties that can have distinct and varied access rights. These roles are incorporated into TRABAC. The efficacy of TRABAC has been evaluated in five access control scenarios. Our experimental results show that TRABAC is capable of delegating access to four different supply chain roles. Importantly, TRABAC can effectively prevent unauthorized access requests by accounts that lack a valid Level 1 role or accounts that lack a valid token attribute or a tag in Level 2 of TRABAC.
A model for knowledge portal to support communities of practice Aisyah Ismail, Shahida Sulaiman 2011 5th Malaysian Conference in Software Engineering Mysec 2011, 2011 Communities of practice (CoP) are groups of individuals with common interest who communicate and share knowledge among their respective group. The use of knowledge portals for CoP will assist the exchange of knowledge, thus it promotes the learning process. Nevertheless, such portals may encounter many challenges to draw the interest among the members in sharing their knowledge voluntarily. As the result, the portals face inactive participants among the members. Knowledge sharing system such as knowledge portal is useless without knowledge sharing activity among its members. In order to encourage users to share their knowledge, we first must uncover the underlying problems on why the users are reluctant to share their knowledge through the knowledge sharing system. This paper reviews the current obstacles in knowledge sharing among CoP and proposes a model to support the needs that software engineers may consider when designing a knowledge portal.
Perspectives on knowledge sharing system for special interest group (SIG): Culture, power issues and user interface Aisyah Ismail, Shahida Sulaiman, Maziani Sabudin Icctd 2009 2009 International Conference on Computer Technology and Development, 2009 Electronic community (e-community) has been a vital platform among members of a special interest group (SIG). Compared to other interest groups, technical SIG groups require more beneficial communications and materials to be shared among the members. However, they may encounter a lot of challenges to draw the interest among the members in sharing their knowledge voluntarily. A lot of knowledge sharing researches focuses on how to develop a knowledge sharing system. Hence, they overlook the need to integrate social aspects in the design of such systems. As the result, the systems face inactive participants among the members. In fact, the most crucial part of developing such online communities is on how to encourage users to contribute and share their knowledge. We must discover the underlying problems on why the users are reluctant to share their knowledge through the knowledge sharing system. This paper discusses the survey conducted in order to gain users’ perspectives towards such systems for SIG.
A point-based semi-automatic expertise classification (PBaSE) method for knowledge management of an online special interest group Aisyah Ismail, Shahida Sulaiman, Maziani Sabudin, Sarina Sulaiman Proceedings International Symposium on Information Technology 2008 Itsim, 2008 An online Special Interest Group is a group of people with the same interest gather to form an online community through the Internet. In certain cases where the knowledge is being manipulated, the portal of a Special Interest Group is in a form of knowledge portal. This portal allows interaction among its community members. Interaction through forum in the portal makes activities such as discussion of problems and knowledge sharing among each other possible. The need to classify users’ expertise in a Special Interest Group is crucial task. This paper describes a Point-based Semiautomatic Expertise classification method to classify users’ expertise in a Special Interest Group knowledge portal.
A classification and visualization approach for knowledge management of a special interest group Proceedings of the 4th IASTED International Conference on Advances in Computer Science and Technology Acst 2008, 2008
RECENT SCHOLAR PUBLICATIONS
Cost and performance analysis on decentralized file systems for blockchain-based applications: State-of-the-art report A Ismail, M Toohey, YC Lee, Z Dong, AY Zomaya 2022 IEEE International Conference on Blockchain (Blockchain), 230-237 , 2022 2022 Citations: 37
Trabac: A tokenized role-attribute based access control using smart contract for supply chain applications A Ismail, Q Wu, M Toohey, YC Lee, Z Dong, AY Zomaya 2021 IEEE International Conference on Blockchain (Blockchain), 584-589 , 2021 2021 Citations: 10
A model for knowledge portal to support communities of practice A Ismail, S Sulaiman 2011 Malaysian Conference in Software Engineering, 451-457 , 2011 2011 Citations: 4
Classifying Expertise in a Special Interest Group Knowledge Portal Using a Point-Based Semi-Automatic Expertise (PBASE) Method A Ismail, S Sulaiman, M Sabudin, R Abdullah, S Sulaiman Knowledge Management , 2010 2010
Perspectives on Knowledge Sharing System for Special Interest Group (SIG): Culture, Power Issues and User Interface A Ismail, S Sulaiman, M Sabudin 2009 International Conference on Computer Technology and Development 1, 416-420 , 2009 2009 Citations: 1
A point-based semi-automatic expertise classification (PBaSE) method for knowledge management of an online Special Interest Group A Ismail, S Sulaiman, M Sabudin, S Sulaiman 2008 International Symposium on Information Technology 2, 1-7 , 2008 2008 Citations: 7
A classification and visualization approach for knowledge management of a special interest group S Sulaiman, A Ismail, AT Khader, M Sabudin Proceedings of the Fourth IASTED International Conference 605 (237), 31 , 2008 2008 Citations: 2
MOST CITED SCHOLAR PUBLICATIONS
Cost and performance analysis on decentralized file systems for blockchain-based applications: State-of-the-art report A Ismail, M Toohey, YC Lee, Z Dong, AY Zomaya 2022 IEEE International Conference on Blockchain (Blockchain), 230-237 , 2022 2022 Citations: 37
Trabac: A tokenized role-attribute based access control using smart contract for supply chain applications A Ismail, Q Wu, M Toohey, YC Lee, Z Dong, AY Zomaya 2021 IEEE International Conference on Blockchain (Blockchain), 584-589 , 2021 2021 Citations: 10
A point-based semi-automatic expertise classification (PBaSE) method for knowledge management of an online Special Interest Group A Ismail, S Sulaiman, M Sabudin, S Sulaiman 2008 International Symposium on Information Technology 2, 1-7 , 2008 2008 Citations: 7
A model for knowledge portal to support communities of practice A Ismail, S Sulaiman 2011 Malaysian Conference in Software Engineering, 451-457 , 2011 2011 Citations: 4
A classification and visualization approach for knowledge management of a special interest group S Sulaiman, A Ismail, AT Khader, M Sabudin Proceedings of the Fourth IASTED International Conference 605 (237), 31 , 2008 2008 Citations: 2
Perspectives on Knowledge Sharing System for Special Interest Group (SIG): Culture, Power Issues and User Interface A Ismail, S Sulaiman, M Sabudin 2009 International Conference on Computer Technology and Development 1, 416-420 , 2009 2009 Citations: 1
Classifying Expertise in a Special Interest Group Knowledge Portal Using a Point-Based Semi-Automatic Expertise (PBASE) Method A Ismail, S Sulaiman, M Sabudin, R Abdullah, S Sulaiman Knowledge Management , 2010 2010
