Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Analysis of the Revocable-Storage Identity-Based Encryption
  Scheme   Cloud computing can provide a flexible way to effectively share data among
multiple users since it can overcome the time and location constraints of
computing resource usage. However, the users of cloud computing are still
reluctant to share sensitive data to a cloud server since the cloud server
should be treated as an untrusted entity. In order to support secure and
efficient data sharing in cloud computing environment, Wei et al. recently
extended the concept of identity-based encryption (IBE) to support key
revocation and ciphertext update functionalities, and proposed a
revocable-storage identity-based encryption (RS-IBE) scheme. In this paper, we
show that the RS-IBE scheme of Wei et al. does not satisfy the correctness
property of RS-IBE. In addition, we propose a method to modify the existing
RS-IBE scheme to be a correct and secure scheme.

26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph