Results 141 to 150 of about 701 (176)
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An Efficient Certificateless Signature Scheme
2005Traditional certificate based cryptosystem requires high maintenance cost for certificate management. Although, identity based cryptosystem reduces the overhead of certificate management, it suffers from the drawback of key escrow. Certificateless cryptosystem combines the advantages of both certificate based and identity based cryptosystems as it ...
M. Choudary Gorantla, Ashutosh Saxena
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An Improved Certificateless Aggregate Signature
2014 IEEE International Conference on Computer and Information Technology, 2014Recently, Hou et al. Proposed an improved certificate less aggregate signature (CLASS) scheme based on Xiong et al's scheme. They also demonstrated the scheme is provably secure in the random oracle model. Unfortunately, by giving concrete attacks, we point out that Hou et al.'s scheme is not secure in their security model. Then, we propose an improved
Jiang Deng +3 more
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Efficient and Short Certificateless Signature
2008A certificateless signature (CLS) scheme with short signature size is proposed in this paper. Our scheme is as efficient as BLS short signature scheme in both communication and computation, and therefore turns out to be more efficient than other CLS schemes proposed so far.
Raylin Tso, Xun Yi, Xinyi Huang 0001
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2009
Certificateless cryptography combines the best of traditional public-key cryptography and the ID-based paradigm. There is no need to get and verify certificates, and the secret keys are not under the key generation center (KGC)'s escrow.
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Certificateless cryptography combines the best of traditional public-key cryptography and the ID-based paradigm. There is no need to get and verify certificates, and the secret keys are not under the key generation center (KGC)'s escrow.
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Certificateless Aggregate Signature Scheme
2010 International Conference on E-Business and E-Government, 2010This paper puts forward a secure construction of certificateless aggregate signature scheme using bilinear maps. The security of our scheme is based on the infeasibility of the Computational Diffie-Hellman problem and is formally proven in the strongest security model of certificateless aggregate signature schemes.
Hu Chen, Wangan Song, Bing Zhao
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Cryptanalysis of a Certificateless Signcryption Scheme
2019 16th International ISC (Iranian Society of Cryptology) Conference on Information Security and Cryptology (ISCISC), 2019In 2016, Zheng and Li proposed a certificateless signcryption (CL-SC) scheme and claimed that their scheme is confidential (IND-CCA) and unforgeable (EUF-CMA) against both key replacement and malicious KGC attacks, in the standard model. In this paper, we propose both key replacement and malicious KGC attacks against confidentiality and unforgeability ...
Parvin Rastegari, Mohammad Dakhilalian
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Certificateless Threshold Signature Schemes
2005We analyze the relationship and subtle difference between the notion of certificateless public key cryptography (CL-PKC) and identity-based schemes without a trusted private key generator (PKG), then propose a certificateless threshold signature scheme based on bilinear pairings.
Lichen Wang +3 more
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Cryptanalysis and Improvement for Certificateless Aggregate Signature
Fundamenta Informaticae, 2018In order to satisfy application in resource constrained environment, aggregate signature schemes have been widely investigated. Recently, He et al. pointed out that certificateless aggregate signature (CLAS) scheme proposed by Xiong et al. was insecure against the Type II adversary and presented an possible improvement.
Jiguo Li 0001 +2 more
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Efficient Certificateless Proxy Signature Scheme
International Journal of Foundations of Computer Science, 2016A proxy signature scheme allows a proxy signer to sign messages on behalf of an original signer within a given context. We propose a certificateless proxy signature (CLPS) scheme, and prove it's security under a stronger security model. Although some good results were achieved in speeding up the computation of pairing function in recent years, it is ...
Lunzhi Deng, Jiwen Zeng, Huawei Huang
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Efficient Certificateless Signature Schemes
2007Recently, in order to eliminate the use of certificates in certified public key cryptography and the key-escrow problem in identity based cryptography, the notion of certificateless public key cryptography was introduced. In this paper, to construct an efficient certificateless signature (CLS) scheme, we present a new approach compactly and ...
Kyu Young Choi +3 more
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