Proposal for Optical One-time Password Authentication Using Digital Holography

Abstract

A new optical one-time password (OTP) authentication method using digital holography is proposed, which enhances security strength in the authentication system. A challenge-response optical OTP algorithm based on two-factor authentication is presented using two-step phase-shifting digital holography, and two-way authentication is also performed using challenge-response handshake in both directions. Identification (ID), password (PW), and OTP are encrypted with a shared key by applying phase-shifting digital holography, and these encrypted pieces of information are verified by each party by means of the shared key. The encrypted digital holograms are obtained by Fourier-transform holography and are recorded on a CCD with 256 quantized gray-level intensities. Because the intensity pattern of such an encrypted digital hologram is distributed randomly, it guards against a replay attack and results in higher security level. The proposed method has advantages, in that it does not require a time-synchronized OTP, and can be applied to various authentication applications. Computer experiments show that the proposed method is feasible for high-security OTP authentication.

Analysis of Distinguishable Security between the One-Time Password Extraction Function Family and Random Function Family

“…Authentication methods using OTPs are divided into synchronous and asynchronous methods, and are classified into timing synchronization, event synchronization, and combination synchronization [13]. Each method has its advantages and disadvantages, and the timing method may vary, depending on the situation.…”