Robust Forward-Secure Signature Schemes with Proactive Security

Tzeng, Wen-Guey; Tzeng, Zhi-Jia

doi:10.1007/3-540-44586-2_19

Cited by 20 publications

(17 citation statements)

References 24 publications

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“…Their scheme can be viewed as an improvement of the Bellare-Miner scheme [12]. Tzeng and Tzeng [17] proposed a robust forward-secure signature scheme which enhanced the security of Abdalla and Reyzin's forward-secure signature scheme by using threshold 2 J. Li et al and proactive mechanisms.…”

Section: Related Workmentioning

confidence: 99%

A Forward-Secure Certificate-Based Signature Scheme

Teng

Huang

et al. 2013

The Computer Journal

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Cryptographic computations are often carried out on insecure devices for which the threat of key exposure raises a serious concern. In an effort to address the key exposure problem, the notion of forward security was first presented by Günther in 1990. In a forward-secure scheme, secret keys are updated at regular periods of time; exposure of the secret key corresponding to a given time period does not enable an adversary to 'break' the scheme for any prior time period. In this paper, we first introduce forward security into certificate-based cryptography and define the security model of forward-secure certificate-based signatures (CBSs). Then we propose a forward-secure CBS scheme, which is shown to be secure against adaptive chosen message attacks under the computational DiffieHellman assumption in the random oracle model. Our result can be viewed as the first step toward solving the key exposure problem in CBSs and thus improving the security of the whole system.

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Section: Related Workmentioning

confidence: 99%

A Forward-Secure Certificate-Based Signature Scheme

Teng

Huang

et al. 2013

The Computer Journal

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“…Kozlov and Reyzin [18] proposed a forward signature scheme with fast key update; Song [21] suggested a forward secure group signature scheme; Duc et al [10] proposed a forward secure blind signature scheme based on the strong RSA problem. The researches on threshold signature scheme with forward secrecy are presented in [1] and [22]. Recently, key insulated and intrusion resilience mechanisms are also explored to provide high level of security.…”

Section: Introductionmentioning

confidence: 99%

Yet Another Forward Secure Signature from Bilinear Pairings

Kim

2006

Information Security and Cryptology - ICISC 2005

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Abstract. In this work, we have proposed yet another forward secure signature based on bilinear pairings. Our forward secure signature requires the general security parameters only independent to the total number of time periods. The scheme can perform key evolving for unlimited time periods while maintaining sizes of keys and signature fixed. In addition, the signing algorithm is very efficient with the simple verification algorithm. We also provide a formal definition along with a detailed security proof of our signature scheme under the assumption of Computational Diffie-Hellman problem.

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“…In this case d=inv (17,20)=13. So we get both a new public key (17) The length and number of zero's in each element can be used to calculate the date of using the next date of that element.…”

Section: Enew= Eold+l+h(x)mentioning

confidence: 99%

“…In this case 17 satisfies the first condition in that (1<18<20), and the GCD (17,20) is 1 so we take it as a new public key . if the GCD of the public key is not 1 so we choose the nearest public key in either the left side or the right side of that new public key.…”

Section: Enew= Eold+l+h(x)mentioning

confidence: 99%

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A New Secure Forward Digital Signatures based on Forecasting and Statistical Entropy of Key Exposures

Al-Athari¹,

Hussain²,

Al-Helali³

2016

International Journal of Advanced Research in Computer and Comm

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Abstract:A new method of forward digital signatures is proposed in this paper. All of the previous forward digital signatures depend on changing the private key periodically but they keep the public key. The proposed system will change both private keys and public keys that can be generated only by authorized users to enhance the authenticity of users. Another important proposal is that the expiration of that public key depends on the length of the document so the sender must compute the expired time of his/her document depending on its length. This method also can be used to change the private key depending on the expired date of the document but the public key is still fixed. In order to make this digital signature more efficient, the system must change the private keys in terms of their critical times that indicate the period of exposure of the keys by different attacks types. So the ability to change these keys do not depend on fixed periods as in most forward digital signatures but also depend on these critical times and the entropy of the information of the keys.

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Robust Forward-Secure Signature Schemes with Proactive Security

Cited by 20 publications

References 24 publications

A Forward-Secure Certificate-Based Signature Scheme

A Forward-Secure Certificate-Based Signature Scheme

Yet Another Forward Secure Signature from Bilinear Pairings

A New Secure Forward Digital Signatures based on Forecasting and Statistical Entropy of Key Exposures

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