Multiparty Selective Disclosure using Attribute-Based Encryption

• URL: http://arxiv.org/abs/2505.09034v1
• Date: Wed, 14 May 2025 00:08:30 GMT
• Title: Multiparty Selective Disclosure using Attribute-Based Encryption
• Authors: Shigenori Ohashi,
• Abstract summary: This study proposes a mechanism for SD-JWT (Selective Disclosure Web Token) Disclosures using Attribute-Based Encryption (ABE)<n>By integrating Ciphertext-Policy ABE into the existing SD-JWT framework, the Holder can assign decryption policies to Disclosures, ensuring information is selectively disclosed.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: 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.

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