A heterogeneous signcryption scheme for smart grid with trusted multi-ciphertext equality test.

Area of Science:

• Computer Science
• Cybersecurity
• Cryptography

Background:

• Smart grids improve energy efficiency but introduce significant security vulnerabilities.
• Existing security solutions struggle with heterogeneous cryptosystems, low security, and inefficient data retrieval.
• Traditional public key cryptography faces challenges with certificate management.

Purpose of the Study:

• To propose a novel heterogeneous signcryption (HSC) scheme with a trusted multi-ciphertext equality test (MET).
• To enhance security and efficiency in smart grid communications, particularly for power data.
• To address limitations of existing security schemes, including interoperability and certificate management.

Main Methods:

• Developed a heterogeneous signcryption (HSC) scheme integrating multi-ciphertext equality test (MET) technology.
• Utilized blockchain and smart contract technologies to ensure the credibility of test results.
• Provided security proofs under the random oracle model, based on established computational problems (BDH, CDH, q-SDH).

Main Results:

• The proposed HSC scheme supports secure communication between identity-based and certificateless cryptosystems.
• It ensures confidentiality and authentication of power data while eliminating certificate management overhead.
• The MET technology reduces the computational cost of equality tests.
• Blockchain integration guarantees the trustworthiness of test outcomes without relying on cloud servers.

Conclusions:

• The novel HSC scheme offers enhanced security attributes and lower computational overhead compared to existing solutions.
• It effectively addresses the security challenges in smart grid environments.
• The integration of advanced cryptographic and blockchain technologies provides a robust and efficient security framework.