According to @kostascrypto, Sui has introduced zkAt (Zero-Knowledge Authenticator), a novel blockchain primitive that enhances privacy by hiding authentication processes on-chain (source: Twitter/@kostascrypto, May 24, 2025). Unlike zkLogin, Plasma, or Lightning Network, zkAt offers advanced zero-knowledge-based authentication, reducing exposure of sensitive user credentials and improving transaction security. This innovation could attract significant developer and investor interest in Sui's ecosystem, potentially boosting SUI token demand and setting a new standard for privacy-focused DeFi solutions.