NELI-AUTH: Authentication System Based on Non-equal-length Input for Virtual Environment

Existing authentication approaches for virtual reality are either inefficient or susceptible to observation attacks. In this work, we present NELI-AUTH, a non-equal-length input-based identity authentication system for virtual reality. The user may enter the password using the alternative operation of two controllers and the non-equal-length item input procedure to form the final password. This scheme's confirmation operation is difficult to observe, which not only provides a high level of security but also ensures the consistency of the input operation in each verification process, thereby significantly enhancing the input's efficiency in the verification process.