Embodiments of the present invention provide a system for security analysis and authentication. The system can generate a one time password (OTP) signature for a user using a neural network machine learning system. This OTP signature can be analyzed by multiple applications that each utilize different certain authentication verification matching requirements, such that security concerns and strengths of varied downstream applications are taken into account on an individual application basis. Each application determines an authentication value for the user based on the OTP signature, and access or other permissions are granted in response to the authentication value meeting or exceeding a threshold value for that application.