• Title, Summary, Keyword: masquerading

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Cryptanalysis Of Two Remote User Authentication Schemes Using Smart Cards

  • Yoon Eun-Jun;Ryu Eun-Kyung;Jo Young-Woo;Yoo Kee-Young
    • Proceedings of the IEEK Conference
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    • pp.152-154
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    • 2004
  • In 2004, Ku-Chen proposed an improvement to Chien et al.'s scheme to prevent from some weaknesses. Lee et al. also proposed an improvement to Chien et al.'s scheme to prevent from parallel session attack. This paper, however, will demonstrate that Ku-Chen's scheme is still vulnerable to the parallel session attack and Lee et al.'s scheme is also vulnerable to masquerading server attack.

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Fractured styloid process masquerading as neck pain: Cone-beam computed tomography investigation and review of the literature

  • Khan, Hassan M.;Fraser, Andrew D.;Daws, Steven;Thoppay, Jaisri;Mupparapu, Mel
    • Imaging Science in Dentistry
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    • v.48 no.1
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    • pp.67-72
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    • 2018
  • Historically, Eagle syndrome is a term that has been used to describe radiating pain in the orofacial region, foreign body sensation, and/or dysphagia due to a unilateral or bilateral elongated styloid process impinging upon the tonsillar region. Because elongated styloid processes-with or without associated Eagle syndrome-can present with various symptoms and radiographic findings, it can be challenging for healthcare practitioners to formulate an accurate diagnosis. Abnormal styloid anatomy can lead to a multitude of symptoms, including chronic orofacial/neck pain, thus masquerading as more commonly diagnosed conditions. In this report, we describe a patient who presented to our department with styloid process elongation and fracture. A careful history, physical examination, and a cone-beam computed tomography (CBCT) investigation led to the diagnosis. The patient was then referred for appropriate care. This case report demonstrates the utilization of CBCT in differentiating a fracture site from a pseudo-joint that might mimic a fracture.

Remote System User Authentication Scheme using Smartcards (스마트카드를 이용한 원격 시스템 사용자 인증 프로토콜)

  • Jeong, Min-Kyoung;Shin, Seung-Soo;Han, Kun-Hee;Oh, Sang-Young
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.10 no.3
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    • pp.572-578
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    • 2009
  • Bindu et al. pointed out that Chein et al. scheme is insecure insider attack and man-in-middle attack. And then they proposed new one. In the paper, However, Bindu et al's scheme also have some problems; It is strong masquerading server/user attack and restricted reply attack. Hence we proposed improved scheme. finally, we completely had evaluated the one's security on strong masquerading server/user attack, Insider attack, Restricted attack, Stolen-verifier attack and forward secrecy. In this paper, although proposed scheme includes more operation than Bindu et al. scheme, our scheme overcomes problems of Bindu et al. scheme by the operation that is light as not to influence on modern computing technology.

Cryptanalysis of Remote User Authentication Scheme (원격 사용자 인증 구조의 암호학적 분석)

  • Choi, Jong-Seok;Shin, Seung-Soo;Han, Kun-Hee
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.10 no.2
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    • pp.327-333
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    • 2009
  • In 2004, Das et al. proposed a scheme for preserving a user anonymity. However, In 2005, Chien and Chen pointed out that Das et al. scheme fail to protect the user anonymity, and proposed a new scheme. And then in 2007, Hu et al. pointed out that Chien and Chen scheme also has some problems; it is Strong masquerading server/user attack, Restricted replay attack, Denial of service attack. it also slow wrong password detection, and proposed a new scheme. In 2008, Bindu et al. repeatedly pointed out on Chien and Chen scheme and proposed their scheme. However, we point out that all of their scheme also has some problems; it is not to protect the user anonymity and Denial of service attack. In addition, Bindu et al. is vulnerable to Strong masquerading server/user attack. Therefore, we demonstrate that their scheme also have some problems; it is the user anonymity and denial of service attack as above.

Improvements of a Dynamic ID-Based Remote User Authentication Scheme (동적 ID 기반 원격 사용자 인증 스킴의 보안성 개선)

  • Young-Do, Joo;An, Young-Hwa
    • The Journal of The Institute of Internet, Broadcasting and Communication
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    • v.11 no.6
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    • pp.303-310
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    • 2011
  • Recently, many user authentication schemes using smart cards have been proposed to improve the security weaknesses in user authentication process. In 2009, Wang et al. proposed a more effective and secure dynamic ID-based remote user authentication scheme to improve the security weakness of Das et al.'s scheme, and asserted that the improved scheme is secure against independent of password in authentication phase and provides mutual authentication between the user and the remote server. However, in this paper, we analyze the security of Wang et al. scheme and demonstrate that Wang et al.'s scheme is vulnerable to the man-in-the-middle attack and the off-line password guessing attack. In addition, we show that Wang et al. scheme also fails to provide mutual authentication. Accordingly, we propose an improved scheme to overcome these security weakness even if the secrete information stored in the smart card is revealed. Our proposed scheme can withstand the user impersonation attack, the server masquerading attack and off-line password guessing attack. Furthermore, this improved scheme provides the mutual authentication and is more effective than Wang et al.'s scheme in term of the computational complexities.

Improved Two-Party ID-Based Authenticated Key Agreement Protocol (개선된 두 참여자간 식별자 기반 인증된 키 동의 프로토콜)

  • Vallent, Thokozani Felix;Kim, Hae-Jung;Yoon, Eun-Jun;Kim, Hyunsung
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.38C no.7
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    • pp.595-604
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    • 2013
  • Devising a secure authenticated key agreement (AKA) protocol for two entities communicating over an open network is a matter of current research. McCullagh et al. proposed a new two-party identity-based AKA protocol supporting both key escrow and key escrow-less property instantiated by either in a single domain or over two distinct domains. In this paper, we show that their protocol over two distinct domains suffers from masquerading attack and therefore does not satisfy the claimed security. The attack is made possible due to the lack of sufficient authentication of entity and integrity assurance in the protocol. We then propose an efficient verifiable key agreement protocol by including signature primitive in the authentication procedure to solve the problem of McCullagh et al.'s protocol.

Security Enhancement of Biometrics-based Remote User Authentication Scheme Using Smart Cards (스마트 카드를 이용한 생체인식 기반 원격 사용자 인증 스킴의 보안성 개선)

  • An, Young-Hwa;Joo, Young-Do
    • The Journal of The Institute of Internet, Broadcasting and Communication
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    • v.12 no.1
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    • pp.231-237
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    • 2012
  • In 2011, Das proposed an effective biometrics-based remote user authentication scheme using smart cards that can provide strong authentication and mutual authentication, while eliminating the security drawbacks of Li-Hwang's scheme. In this paper, we have shown that Das's scheme is still insecure against several attacks and does not provide mutual authentication. Also, we proposed the enhanced scheme to overcome these security weaknesses, even if the secret information stored in the smart card is revealed. As a result of security analysis, the enhanced scheme is secure against user impersonation attack, server masquerading attack, off-line password guessing attack, and insider attack. And we can see that the enhanced scheme provides mutual authentication between the user and the server.