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Gong, Long, Hong and Chen defined the security model of certificateless aggregate signature schemes for the first time. However, there are some weaknesses exist in their model. In this paper, we point out some drawbacks of the security model of Gong et al.'s and present a new one. A certificateless aggregate signature scheme that is provably secure in our model is also presented. The security of our...
We propose a new aggregate signature scheme from bilinear pairings. It requires constant pairing operations in the verification and the size of aggregate signature is independent of the number of signers. In the public key infrastructure (PKI) setting, it is the first aggregate signature scheme with these properties. Hence, it is very practical in the environments with computational power limited...
This paper introduces a new digital signature primitive that allows a proxy signer to sign messages on behalf of the original signer, in a way that do not allow the recipient of the signature to disclose the contents of the signed information to any third party without the proxy signer's consent. The above primitive, called proxy chameleon signature enjoys all the attributes in the normal proxy signature...
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