생체 인증에서의 프라이버시 보호 기술

The use of biometric information is increasingly used as a user authentication means, and accordingly, there is a concern that privacy of personal information may be infringed due to leakage of biometric information. In order to solve this problem, a secure biometric authentication technology including privacy preservation function that does not infringe personal information is being studied in addition to solution through legislation. In this paper, we describe the types of personal information infringement in biometric authentication and discuss various privacy-preservation based biometric authentication methods proposed to prevent such infringement. Specifically, the methods proposed to recent have been classified into two types: one based on linking of biometric information and key information and another one of transforming and protecting biometric information itself. Then, the techniques belonging to each category are analyzed including finding out the pros and cons of them compared with each other.