Id-Based Digital Multisignature Scheme

A new kind of digital signature scheme, correlative message group (CMG) signature, which concerning a group of correlative messages, is proposed in this paper. Each message m i in the correlative message group {m 1 , m 2 , . . . , mn} can only be delivered to the dedicated recipient U i . The recipient U j will not know m i (j = i; 1 ≤ i, j ≤ n), but each U j (j = 1, 2, . . . , n) should be able to verify the CMG signature. The procedure of generating and verifying the CMG signature is described, and the security and performance of which are analyzed. A sample application of CMG signature to e-commerce is presented in this paper also.

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Certificateless Public Verification for the Outsourced Data Integrity in Cloud Storage

Huang

Zhou

Zhang

et al. 2018

J CIRCUIT SYST COMP

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By advances in cloud storage systems, users have access to the data saved in the cloud and can manipulate the data without limitation of time and place. As the data owner no longer possesses data physically, he is required to ensure the integrity of the data stored in the cloud with the public key given by public key infrastructure (PKI). Thus the security of PKI and certificates are essential. However, there are numerous security risks in the traditional PKI and it is complex to administer the certificates. Certificateless public key cryptography is used in this paper to solve these problems. We also use elliptic curve group to reduce computation overhead. In this paper, we design a certificateless public verification mechanism to check the integrity of data outsourced in the cloud and we further extend it to support a multiuser group by batch verification. Specifically, a public verifier who replaces the data owner to check the integrity in the proposed scheme does not require to manage any certificates during the verification process. Meanwhile, a verifier is not required to download the entire file for integrity checking. Theoretical analyses verify the security of our scheme and experimental results show its efficiency.

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Id-Based Digital Multisignature Scheme

Cited by 5 publications

References 8 publications

Correlative Message Group Digital Signature and Its Application to E-Commerce

Correlative Message Group Digital Signature and Its Application to E-Commerce

Correlative Message Group Digital Signature and Its Application to E-Commerce

Certificateless Public Verification for the Outsourced Data Integrity in Cloud Storage

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