Cloud Data Security Techniques for Payment Card Systems: A Review of Cryptographic and Blockchain-Based Approaches (Published)
With the exponential growth of payment card transactions, the global shift from cash to digital payments has intensified, and the Payment Card Industry (PCI) has embraced cloud computing for its scalability and efficiency. Traditional cloud storage systems, however, rely on trusted third-party providers, which can result in centralized storage, high costs, and trust concerns. This review examines a wide range of literature on cloud computing, cloud security and trust, e-commerce risk, and cryptographic techniques relevant to the protection of payment card data stored and shared in the cloud. It surveys the rise of cloud computing and its service and deployment models, the security issues and attack vectors that affect cloud-based systems, the role of phishing in payment card fraud, and the influence of perceived risk on consumers’ online purchase intention and trust. It further reviews cryptographic techniques used to secure cloud data, including symmetric and public-key encryption, searchable encryption, homomorphic encryption, and attribute-based cryptography (encryption, signatures, and signcryption), before examining blockchain technology as a decentralizing mechanism for cloud trust. A comparative analysis of existing cloud data security protocols is presented, showing that Attribute-Based Signcryption (ABSC) offers the most comprehensive coverage of confidentiality, integrity, availability, authenticity, and access control relative to Attribute-Based Encryption (ABE) and Attribute-Based Signatures (ABS) used independently. The review concludes that blockchain-integrated attribute-based signcryption is a promising direction for decentralizing trust in cloud-stored payment card data, but that such constructions require rigorous, formally verified security analysis before deployment, since at least one prominent scheme has been shown to be insecure.
Keywords: Blockchain, Cloud Computing, Cryptography, attribute-based signcryption, payment card security, perceived risk; phishing
The Invisible War on the Chain: Cyber Defense Strategies for Enterprise Blockchain Security (Published)
Blockchain technology adoption across industries creates a complex security landscape despite inherent cryptographic protection. This article explores critical risk elements including smart contract vulnerabilities, private key management challenges, consensus mechanism attacks, oracle vulnerabilities, and integration points with legacy systems. It outlines comprehensive defense mechanisms spanning formal verification processes, hardware security modules, network segmentation, governance frameworks with multi-signature requirements, and continuous monitoring solutions. As organizations increasingly implement blockchain for supply chain transparency, asset tracking, and transaction platforms, security strategies must evolve to address both blockchain-specific threats and traditional cybersecurity risks. The shifting security paradigm requires specialized expertise, regular training, participation in information sharing communities, and adaptive governance frameworks. Future challenges include quantum computing threats, scalability trade-offs, regulatory compliance, increasing smart contract complexity, and cross-chain interoperability concerns, necessitating proactive security planning that anticipates blockchain evolution.
Keywords: Authentication, Cryptography, Decentralization, Verification, interoperability
A Framework for Security of Data in Telemedicine (Published)
One of the challenges of telemedicine as observed in the literature is the issue of insecurity of data. This has come with its attendant lack of confidentiality and data integrity, the attributes most needed in medical records. An attempt to proffer solution to this problem is in the design of a framework comprising Rivest, Shamir and Adleman (RSA) cipher combined with the F4 frequency domain steganography algorithm. The framework is demonstrated with a simulated scenario. Complicated though this integration seems to be, the foolproof security offered outweighs the computational complexity.
Keywords: Confidentiality, Cryptography, F4, Integrity, RSA, Security, Steganography, telemedicine
ROLE OF CRYPTOGRAPHY IN WIRELESSES SENSOR: FUTURE POTENTIAL (Published)
Wireless Sensor Network (WSN) assists to communicate with limited frequency and bandwidth through the group of independent nodes. WSN has an extensive application in both industrial and commercial areas to manage peril environments incorporating nuclear power plants and wilderness areas. Cryptography is used for writing secret code and it is an ancient technique. Moreover Cryptography is required in data and telecommunications in order to communicate with unreliable medium especially in the internet. Cryptography technique is classified in several ways but for this paper, the technique will be classified on the basis of number of keys used for decryption and encryption. Elliptic Curve Cryptography is an efficient technique in providing security solution for wireless networks. As compared with traditional public key cryptography such as RSA, eclipse curve cryptography attains better result in providing security services. The findings reported that the newly developed protocol was more scalable, less weight and required less memory compared to symmetric based cryptography. This paper concludes that Cryptography is one such technique to confront security problems in WSN. However cryptography alone is not enough to confront WSN problems. It is essential to use the key management process carefully in order to achieve higher security system networks
Keywords: Cryptography, Elliptic Curve Cryptography, RSA, Wireless Sensor Network, system networks