With the cloud storage services, users can easily form a group and share data with each other. Considering the cloud is untrusted, public auditing is needed to ensure the integrity of the shared data. Once a user is revoked from the group, signatures from this revoked users need to be re-computed by an existing user, which may incur heavy communication and computation cost. Proxy re-signatures can be used here to allow the cloud to compute re-signatures on behalf of the group. However, a malicious cloud is able to arbitrarily convert signatures from one user to another using the re-signing keys. Moreover, collusion between revoked users and malicious clouds will disclose the secret values of the remaining users. In this paper, we propose a novel public auditing scheme for the integrity of shared data with efficient collusion-resistant user revocation. In addition, we extend the proposed scheme to support securely signature and verification outsourcing, which allow more efficiency for group users and the auditor. The numerical analyses and experimental results demonstrate that our scheme is provably secure and highly efficient, the outsourcing algorithms make the signatures generation and verification process more efficient and affordable for mobile devices.
Computers & Security – Elsevier
Published: Mar 1, 2018
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera