Results 141 to 150 of about 676 (175)

Certificateless Concurrent Signature Scheme

2008 The 9th International Conference for Young Computer Scientists, 2008
Certificateless public key cryptography was introduced to remove the use of certificate to ensure the authentication of the user's public key in the traditional certificate-based public key cryptography and overcome he key escrow problem in the identity-based public key cryptography.
Zhenjie Huang, Xuanzhi Lin, Rufen Huang
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An Improved Certificateless Aggregate Signature

2014 IEEE International Conference on Computer and Information Technology, 2014
Recently, 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, Chunxiang Xu, Huai Wu, Guangyuan Yang   +3 more
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An Efficient Certificateless Signature Scheme

2005
Traditional 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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Cryptanalysis of a Certificateless Signcryption Scheme

2019 16th International ISC (Iranian Society of Cryptology) Conference on Information Security and Cryptology (ISCISC), 2019
In 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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Generic Construction of Certificateless Encryption

2004
As the Internet becomes an indispensable element of modern life, PKC (Public Key Cryptography) is gaining a considerable attention because it can assure the security requirements of many applications. To guarantee the authenticity of public keys, traditional PKC requires certificates to be signed by a CA (Certification Authority).
Yum, DH, Lee, PJ
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Security Mediated Certificateless Signatures

2007
In PKC 2006, Chow, Boyd and Gonzalez Neito introduced the notion of security mediated certificateless (SMC) cryptography. SMC cryptography equips certificateless cryptography with instantaneous revocation. They presented a formal security model with two constructions for SMC encryption. This paper studies SMC signatures.
Wun-She Yap, Sherman S. M. Chow, Swee-Huay Heng, Bok-Min Goi   +3 more
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Certificateless Encryption

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.
openaire   +1 more source

Cryptanalysis and Improvement for Certificateless Aggregate Signature

Fundamenta Informaticae, 2018
In 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, Hong Yuan, Yichen Zhang 0003   +2 more
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Efficient Certificateless Signature Schemes

2007
Recently, 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, Jong Hwan Park, Jung Yeon Hwang, Dong Hoon Lee 0001   +3 more
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Efficient and Short Certificateless Signature

2008
A 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
openaire   +3 more sources