Authentication is ubiquitous but often insecure and inconvenient. oculid provides a new, multi-factor, biometric authentication method that is based on individual characteristics of human eye movements. It is particularly resistant to fraud because detailed characteristics of eye movements cannot be imitated as they are beyond human control. For additional security, it is combined with a second factor, e.g. another biometric or a personal code that is entered via oculid´s proprietary gaze based interaction design. oculid’s biometric is suitable for any industry and application.