2025/05/14 by Shigenori Ohashi, Ohashi, Shigenori
Computer Science · #Cryptography and Data Security #Security in Wireless Sensor Networks
paper · pdf · doi:10.48550/arxiv.2505.09034
This study proposes a mechanism for encrypting SD-JWT (Selective Disclosure JSON Web Token) Disclosures using Attribute-Based Encryption (ABE) to enable flexible access control on the basis of the Verifier's attributes. By integrating Ciphertext-Policy ABE (CP-ABE) into the existing SD-JWT framework, the Holder can assign decryption policies to Disclosures, ensuring information is selectively disclosed. The mechanism's feasibility was evaluated in a virtualized environment by measuring the processing times for SD-JWT generation, encryption, and decryption with varying Disclosure counts (5, 10, 20). Results showed that SD-JWT generation is lightweight, while encryption and decryption times increase linearly with the number of Disclosures. This approach is suitable for privacy-sensitive applications like healthcare, finance, and supply chain tracking but requires optimization for real-time use cases such as IoT. Future research should focus on improving ABE efficiency and addressing scalability challenges.