Obfuscatable multi-recipient re-encryption for secure privacy-preserving personal health record services

Area of Science:

• Cloud Computing
• Data Security
• Health Informatics

Background:

• Cloud computing offers attractive solutions for personal health record (PHR) services.
• Storing sensitive health data in the cloud poses significant privacy risks due to potential security breaches.
• Encryption of patient data on cloud servers is essential for PHR service providers.

Purpose of the Study:

• To develop a secure re-encryption method resistant to white-box attacks.
• To ensure efficient re-encryption for multi-recipient scenarios in cloud-based PHR systems.
• To address the security and efficiency limitations of existing re-encryption techniques.

Main Methods:

• Designed a multi-recipient re-encryption functionality.
• Employed randomness-reusing techniques for enhanced security.
• Utilized obfuscation to protect the re-encryption implementation.

Main Results:

• The proposed solution demonstrates security even under white-box attack conditions.
• Comparative analysis indicates a lower computational cost compared to existing related work.
• The technique effectively handles multi-recipient re-encryption efficiently.

Conclusions:

• The developed technique provides a secure and efficient method for re-encryption.
• It enhances privacy preservation for personal health record systems.
• This approach can be a foundational element for robust cloud-based PHR services.