A Novel Approach to E-voting with Group Identity-based Identification and Homomorphic Encryption Scheme

This article presents a novel e-voting scheme that combines Group Identity-based Identification (GIBI) with Homomorphic Encryption (HE) based on the discrete logarithmic assumption. The proposed scheme uses the Schnorr-like GIBI scheme for voter identification and authorization using zero-knowledge proofs to ensure the <italic>anonymity</italic> and <italic>eligibility</italic> of voters. The voter v<italic>i,j</italic> is granted the authorization to cast a valid vote for a single candidate C<italic>k</italic>. The use of distributed ElGamal provides <italic>fairness</italic> while the use of partial shares for decryption enables <italic>individual</italic> and <italic>universal verifiability</italic> without the need for a central authority. The proposed scheme is secure under various scenarios and <italic>robust</italic> in the random oracle model. The GIBI-HE scheme offers a promising solution for e-voting, providing a sustainable and accessible environment for voters while supporting the <italic>unreusability</italic> of votes and protecting the <italic>privacy</italic> of voters. Authors