• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 2005년도 추계종합학술대회
• /
• pp.1011-1014
• /
• 2005

In this paper, we propose a method that extracts an invariant biometric key in order to apply this biometric key to the crypto-biometric system. This system is a new authentication architecture which can improve the security of current cryptographic system and solve the problem of stored template protection in conventional biometric system, also. To use biometric information as a cryptographic key in crypto-biometric system, same key should be generated from the same person. However, it is difficult to obtain such an invariant biometric key because biometric data is sensitive to surrounding environments. The proposed method solves this problem by clustering Iris Codes obtained by using independent component analysis (ICA).

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제7권8호
• /
• pp.2010-2026
• /
• 2013

The combination of biometrics and cryptography gains a lot of attention from both academic and industry community. The noisy biometric measurement makes traditional identity based cryptosystems unusable. Also the extraction of key from biometric information is difficult. In this paper, we propose an efficient biometric identity based signature scheme (Bio-IBS) that makes use of fuzzy extractor to generate the key from a biometric data of user. The component fuzzy extraction is based on error correction code. We also prove that the security of suggested scheme is reduced to computational Diffie-Hellman (CDH) assumption instead of other strong assumptions. Meanwhile, the comparison with existing schemes shows that efficiency of the system is enhanced.

• 스마트미디어저널
• /
• 제6권2호
• /
• pp.15-25
• /
• 2017

The security and privacy issues derived from unsecurely storing biometrics templates in biometric authentication/ recognition systems have opened a new research area about how to secure the stored biometric templates. Biometrics-based key generation is the newest approach that provides not only a mechanism to protect stored biometric templates in authentication/ recognition systems, but also a method to integrate biometric systems with cryptosystems. Therefore, this approach has attracted much attention from researchers worldwide. A review of current research state to summarize the achievements and remaining works is necessary for further works. In this study, we first outlined the requirements and the primary challenges when implementing these systems. We then summarize the proposed techniques and achievements in representative studies on biometrics-based key generation. From that, we give a discussion about the accomplishments and remaining works with the corresponding challenges in order to provide a direction for further researches in this area.

• 한국멀티미디어학회논문지
• /
• 제13권6호
• /
• pp.875-883
• /
• 2010

In this paper, we present a secure biometric hashing scheme for face recognition by random fusion of global and local features. The Fourier-Mellin transform and Radon transform are adopted respectively to form specialized representation of global and local features, due to their invariance to geometric operations. The final biometric hash is securely generated by random weighting sum of both feature sets. A fourfold key is involved in our algorithm to ensure the security and privacy of biometric templates. The proposed biometric hash can be revocable and replaced by using a new key. Moreover, the attacker cannot obtain any information about the original biometric template without knowing the secret key. The experimental results confirm that our scheme has a satisfactory accuracy performance in terms of EER.

• 정보와 통신
• /
• 제32권6호
• /
• pp.39-49
• /
• 2015

In cryptographic applications, the key protection is either knowledge-based (passwords) or possession-based (tamper-proof device). Unfortunately, both approaches are easily forgotten or stolen, thus introducing various key management issues. By incorporating biometrics technologies which utilize the uniqueness of personal characteristics, the security of cryptosystems could be strengthened as authentication now requires the presence of the user. Biometric Cryptosystem (BC) encompasses the design of cryptographic keys protection methods by incorporating biometrics. BC involves either key-biometrics binding or direct key generation from biometrics. However, the wide acceptance and deployment of BC solutions are constrained by the fuzziness related with biometric data. Hence, error correction codes (ECCs) should be adopted to ensure that fuzziness of biometric data can be alleviated. In this overview paper, we present such ECC solutions used in various BCs. We also delineate on the important facts to be considered when choosing appropriate ECCs for a particular biometric based solution from accuracy performance and security perspectives.

• 정보보호학회논문지
• /
• 제26권1호
• /
• pp.69-79
• /
• 2016

생체 정보를 이용한 사용자 인증은 사용자가 어떠한 정보도 소유하거나 기억할 필요가 없으므로 사용자 측면에서 매우 편리하다. 그러나 생체 정보는 한번 노출되면 영구적으로 사용할 수 없기 때문에 인증 수행 시 생체 정보의 프라이버시 보호가 필수적이다. 또한 생체 정보는 본질적으로 노이즈가 있기 때문에 인증 수행 시 적절한 오차 범위 이내에서 이를 처리할 수 있어야 한다. 최근 퍼지 추출기(fuzzy extractor)를 이용한 생체 정보 기반 인증 프로토콜에 대한 연구가 활발히 진행되고 있으나, 사용자가 헬퍼 데이터(helper data)를 추가적으로 기억해야 하는 문제점이 존재한다. 본 논문에서는 함수 암호 중 하나인 HV-KEM(Hidden Vector Key Encapsulation Mechanism)을 이용하여 사용자가 어떠한 정보도 소유하거나 기억할 필요 없는 생체 정보 기반 인증 프로토콜을 제안한다. 또한, 인증 프로토콜 설계를 위한 HV-KEM의 보안 요구사항을 정립하고 제안하는 인증 프로토콜을 정확성/안전성/효율성 측면에서 분석한다.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제14권7호
• /
• pp.2919-2937
• /
• 2020

Post-Quantum Cryptography (PQC) is rapidly developing as a stable and reliable quantum-resistant form of cryptography, throughout the industry. Similarly to existing cryptography, however, it does not prevent a third-party from using the secret key when third party obtains the secret key by deception, unauthorized sharing, or unauthorized proxying. The most effective alternative to preventing such illegal use is the utilization of biometrics during the generation of the secret key. In this paper, we propose a biometric-based secret key generation scheme for multivariate quadratic signature schemes, such as Rainbow. This prevents the secret key from being used by an unauthorized third party through biometric recognition. It also generates a shorter secret key by applying Principal Component Analysis (PCA)-based Confidence Interval Analysis (CIA) as a feature extraction method. This scheme's optimized implementation performed well at high speeds.

• 한국컴퓨터정보학회논문지
• /
• 제28권3호
• /
• pp.59-65
• /
• 2023

다양한 분야에서 블록체인을 적용한 연구가 활발하게 증가함에 따라 블록체인의 사용자를 증명하는 개인키의 관리가 중요하게 되었다. 개인키를 분실하게 되면 본인의 모든 데이터에 대한 권한을 잃게 된다. 이에 대한 문제점을 해결하고자 기존에는 블록체인 지갑, 부분 정보를 이용한 개인키 복구, 분산 저장을 통한 개인키의 복구 등을 제안하였다. 본 논문에서는 Shamir's Secrete Sharing(SSS) 스킴과 생체정보를 이용하여 안전한 개인키의 백업 및 복구 방안을 제안하고 이에 대한 안전성을 메시지 교환시의 견고성, 재생공격, 중간자 공격 및 위변조 공격에 대해 평가한다.

• Journal of Multimedia Information System
• /
• 제3권2호
• /
• pp.13-20
• /
• 2016

Biometric authentication for account-based mobile payment continues to gain attention because of improvements on sensors that can collect biometric information. We propose an enhanced method for mobile payment security based on biometric authentication. In this mobile payment system, the communication between the user and the relying party is based on public key infrastructure. This method secures both the key and the biometric template in the user side using fuzzy vault biometric cryptosystems, which is based on non-random chaff point generator. In this paper, we consider an important process for the common fuzzy vault system, that is, the feature extraction method. We evaluate various feature extraction methods to enhance the accurate performance of the system.

• 정보보호학회논문지
• /
• 제22권2호
• /
• pp.347-355
• /
• 2012

바이오 보안토큰은 바이오 인식 센서와 바이오인식 정보를 처리할 수 있는 MCU, 보안토큰으로 구성된 USB 형태의 하드웨어 기기로서, 기기 내부에서 바이오인식 센서로 가입자의 바이오인식 정보를 추출하여 보안토큰에 안전하게 저장하며, 사용자 인증시 바이오인식 센서로 부터 취득된 바이오인식 정보와 저장되어 있는 바이오인식 정보를 기기내부 MCU에서 매칭하여 사용자를 인증하는 독립된 하드웨어 보안모듈이다. 기존의 보안토큰이 제공하는 개인인증기법이 ID/패스워드에 기반한 방법이므로 이의 유출로 인해 생길 수 있는 피해를 최소화하고, 고의적인 공인인증서의 오용을 막을 수 있도록 높은 수준의 사용자인증기법을 제공한다. 이에 본 논문에서는 공개키기반구조(PKI: Public Key Infrastructure)를 연동한 바이오보안 토큰의 이용에 있어서 사용자의 바이오인식 정보를 보호하면서 바이오인식 정보를 이용하여 보안 수준이 높은 사용자 인증이 가능한 기법을 제시한다.