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- 저자 : Tran Song Dat Phuc (검색결과 6 건)
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Distinguishing Attack on CPB-Based Cipher COSB-128
Tran Song Dat Phuc,Changhoon Lee 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.1
COSB-128 is a type of fast controllable permutation block (CPB), which is designed to ensure a high speed of data transformation and high stability to differential analysis. In this paper, we present the possibility to distinguish between a 10-round COSB-128 and a 128-bit random permutation through a full 10-round related-key difference characteristic by proposing a distinguishing attack with high probability on this cipher. This attack is another result from previous study of related-key attack on COSB-128 [2]. From that point, it reveals the potential to extend to the related-key recovery attack on this algorithm in the future.
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Rekeying Approach against Side Channel Attacks
( Tran Song Dat Phuc ),( Byoungjin Seok ),( Changhoon Lee ) 한국정보처리학회 2017 한국정보처리학회 학술대회논문집 Vol.24 No.1
Side-channel attacks and in particular differential power analysis (DPA) attacks pose a serious threat to cryptographic implementations. One approach to counteract such attacks is cryptographic schemes based on fresh re-keying. In settings of pre-shared secret keys, such schemes render DPA attacks infeasible by deriving session keys and by ensuring that the attacker cannot collect side-channel leakage on the session key during cryptographic operations with different inputs. This paper present a study on rekeying approach against side channel attacks with current secure schemes and their rekeying functions.
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New Security Approaches for SSL/TLS Attacks Resistance in Practice
Tran Song Dat Phuc(짠송닷푹),Changhoon Lee(이창훈) 한국전자거래학회 2017 한국전자거래학회지 Vol.22 No.2
SSL의 취약점을 이용한 공격 기법인 BEAST를 발표했던 Juliano Rizzo와 Thai Duong이 새로운 공격 기법인 CRIME(Compression Ration Info-leak Made Easy)을 발표하였다. CRIME 공격은 암호화된 데이터에 대한 비밀 정보를 찾아내기 위해 데이터가 압축 및 암호화되는 방법의 취약점을 이용한 공격이다. 공격자는 이 공격법을 반복하여 데이터를 복호화할 수 있고, HTTP 세션의 쿠기 데이터를 복원할 수 있다. 공격자는 SPDY 및 SSL/TLS의 압축 함수를 대상으로 하는 이 보안 취약점을 이용하여 다양한 길이의 입력데이터를 선택함으로써 암호화된 데이터의 길이를 확인할 수 있다. TLS 프로토콜은 두 통신자(서버 및 클라이언트) 사이에서 발생하는 데이터 통신의 무결성을 보장하고 두 대상에 대한 인증 수단을 제공하고 있으며, 최근 몇 년 동안 이들을 대상으로 TLS 메커니즘의 몇몇 특성들을 이용한 다양한 공격들이 수행되고 연구되었다. 본 논문에서는 CRIME 및 SSL/TLS에 대한 다양한 공격 기법들과 이들에 대한 대응 및 구현 방안에 대하여 논의하며, 실용적인 관점에서 SSL/TLS 공격 대응 방안의 방향을 제시한다. Juliano Rizzo and Thai Duong, the authors of the BEAST attack [11, 12] on SSL, have proposed a new attack named CRIME [13] which is Compression Ratio Info-leak Made Easy. The CRIME exploits how data compression and encryption interact to discover secret information about the underlying encrypted data. Repeating this method allows an attacker to eventually decrypt the data and recover HTTP session cookies. This security weakness targets in SPDY and SSL/TLS compression. The attack becomes effective because the attacker is enable to choose different input data and observe the length of the encrypted data that comes out. Since Transport Layer Security (TLS) ensures integrity of data transmitted between two parties (server and client) and provides strong authentication for both parties, in the last few years, it has a wide range of attacks on SSL/TLS which have exploited various features in the TLS mechanism. In this paper, we will discuss about the CRIME and other versions of SSL/TLS attacks along with countermeasures, implementations. We also present direction for SSL/TLS attacks resistance in practice.
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Recovery-Key Attacks against TMN-family Framework for Mobile Wireless Networks
( Tran Song Dat Phuc ),( Yong-hyeon Shin ),( Changhoon Lee ) 한국인터넷정보학회 2021 KSII Transactions on Internet and Information Syst Vol.15 No.6
The proliferation of the Internet of Things (IoT) technologies and applications, especially the rapid rise in the use of mobile devices, from individuals to organizations, has led to the fundamental role of secure wireless networks in all aspects of services that presented with many opportunities and challenges. To ensure the CIA (confidentiality, integrity and accessibility) security model of the networks security and high efficiency of performance results in various resource-constrained applications and environments of the IoT platform, DDO-(data-driven operation) based constructions have been introduced as a primitive design that meet the demand of high speed encryption systems. Among of them, the TMN-family ciphers which were proposed by Tuan P.M., Do Thi B., etc., in 2016, are entirely suitable approaches for various communication applications of wireless mobile networks (WMNs) and advanced wireless sensor networks (WSNs) with high flexibility, applicability and mobility shown in two different algorithm selections, TMN64 and TMN128. The two ciphers provide strong security against known cryptanalysis, such as linear attacks and differential attacks. In this study, we demonstrate new probability results on the security of the two TMN construction versions - TMN64 and TMN128, by proposing efficient related-key recovery attacks. The high probability characteristics (DCs) are constructed under the related-key differential properties on a full number of function rounds of TMN64 and TMN128, as 10-rounds and 12-rounds, respectively. Hence, the amplified boomerang attacks can be applied to break these two ciphers with appropriate complexity of data and time consumptions. The work is expected to be extended and improved with the latest BCT technique for better cryptanalytic results in further research.
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A Study on Rekeying and Sponged-based Scheme against Side Channel Attacks
Tran Song Dat Phuc(짠송닷푹),Changhoon Lee(이창훈) 한국디지털콘텐츠학회 2018 한국디지털콘텐츠학회논문지 Vol.19 No.3
Simple Power Analysis(SPA) and Differential Power Analysis(DPA) attacks are Side Channel Attacks(SCA) which were introduced in 1999 by Kocher et al [2]. SPA corresponds to attacks in which an adversary directly recovers key material from the inspection of a single measurement trace (i.e. power consumption or electromagnetic radiation). DPA is a more sophisticated attacks in which the leakage corresponding to different measurement traces (i.e. different plaintexts encrypted under the same key) is combined. Defenses against SPA and DPA are difficult, since they essentially only reduce the signal the adversary is reading, PA and DPA. This paper presents a study on rekeying and sponged-based approach against SCA with current secure schemes. We also propose a fixed ISAP scheme with more secure encryption and authentication based on secure re-keying and sponge functions.
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