Results 231 to 240 of about 197,054 (272)

Improved heterogeneous aggregation signature scheme

2020 IEEE 9th Joint International Information Technology and Artificial Intelligence Conference (ITAIC), 2020
The heterogeneous aggregate signcryption scheme can authenticate the signatures of multiple messages, thereby ensuring the authenticity of the messages. And this technology also solves the communication problem under different cryptosystems. However, most of the current schemes have hidden dangers of insecurity, and the signcryption may be forged ...
Shijin Li, Yijia Gao, Ting Shi, Fushou Tao   +3 more
openaire   +1 more source

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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Aggregate Proxy Signature and Verifiably Encrypted Proxy Signature

2007
An aggregate signature is a single short string that convinces any verifier that, for all 1 ≤ i ≤ n, signer i signed message mi, where the n signers and n messages are distinct. The main motivation of aggregate signatures is compactness. In this paper, the concept of aggregate proxy signature (APS) is first proposed to compact the proxy signatures ...
Jin Li, Kwangjo Kim, Fangguo Zhang, Xiaofeng Chen   +3 more
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.
Li, Jiguo, Yuan, Hong, Zhang, Yichen
openaire   +2 more sources

Towards Lattice Based Aggregate Signatures

2014
We propose the first lattice-based sequential aggregate signature (SAS) scheme that is provably secure in the random oracle model. As opposed to factoring and number theory based systems, the security of our construction relies on worst-case lattice problems. Generally speaking, SAS schemes enable any group of signers ordered in a chain to sequentially
Rachid El Bansarkhani, Johannes Buchmann
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Sequential Aggregate Signatures, Multisignatures, and Verifiably Encrypted Signatures Without Random Oracles

Journal of Cryptology, 2012
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Lu, Steve, Ostrovsky, Rafail, Sahai, Amit, Shacham, Hovav, Waters, Brent   +4 more
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A new certificateless aggregate signature scheme

Computer Communications, 2009
Aggregate signatures are useful in special areas where the signatures on many different messages generated by many different users need to be compressed. In this paper, we study aggregate signatures in certificateless public key settings. We first present the notion and security model of certificateless aggregate signature schemes.
Lei Zhang, Futai Zhang
openaire   +1 more source

Aggregating Falcon Signatures with LaBRADOR

Several prior works have suggested to use non-interactive arguments of knowledge with short proofs to aggregate signatures of Falcon, which is part of the first post-quantum signatures selected for standardization by NIST. Especially LaBRADOR, based on standard structured lattice assumptions and published at CRYPTO’23, seems promising to realize this ...
Aardal, Marius A., Aranha, Diego F., Boudgoust, Katharina, Kolby, Sebastian, Takahashi, Akira   +4 more
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Some aggregate forward-secure signature schemes

TENCON 2008 - 2008 IEEE Region 10 Conference, 2008
Ordinary digital signatures have an inherent weakness: if the secret key is leaked, then all signatures, even the ones generated before the leak, are no longer trustworthy. Forward-secure digital signatures address this weakness, they ensure that the past signatures remain secure even if the current secret key is leaked.
N.R. Sunitha, B.B. Amberker
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Aggregate Signature with Traceability of Devices Dynamically Generating Invalid Signatures

2021
Aggregate signature schemes enable us to aggregate multiple signatures into a single short signature. One of its typical applications is sensor networks, where a large number of users and devices measure their environments, create signatures to ensure the integrity of the measurements, and transmit their signed data. However, if an invalid signature is
Ryu Ishii, Kyosuke Yamashita, Yusuke Sakai, Takahiro Matsuda, Tadanori Teruya, Goichiro Hanaoka, Kanta Matsuura, Tsutomu Matsumoto   +7 more
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