Efficient Blockchain-Assisted Distributed Identity-Based Signature Scheme for Integrating Consumer Electronics in Metaverse

The metaverse has dramatically transformed the traditional online realm and garnered significant interest from researchers and industry experts. By integrating with consumer electronics such as wearables and smart devices, it presents an immersive virtual world where individuals can engage in diverse activities. As this integration accelerates, there is an increasing need for robust and efficient methods to secure digital communications and transactions. The distributed Identity-Based Digital Signature (IBS) scheme has emerged as a promising solution to address the challenges of authenticity and integrity. However, most distributed IBS schemes are designed to rely on a trusted Key Generation Center (KGC), which introduces security risks of key escrow and a single point of failure. Meanwhile, the extensive use of cryptographic primitives such as homomorphic encryption and zero-knowledge proofs leads to the inefficiency of most schemes. Therefore, this paper proposes a blockchain-assisted fully distributed IBS scheme for integrating consumer electronics in the metaverse that complies with the IEEE P1363 Standard. In detail, our proposal completely eliminates the need for the trusted KGC and the signing key generation process is distributed among multiple users. In addition, we utilize oblivious transfer instead of homomorphic encryption to construct the signature's additive share, making our scheme more efficient. Under the discrete logarithm assumption, it has been demonstrated that our scheme possesses existential unforgeability. Finally, based on the theoretical and experimental simulation analyses, our work shows outstanding effectiveness and practicality.