Security of Cloud-Based Revocable Identity-Based Proxy Re-Encryption Scheme

Designing secure revocable storage systems for a large number of users in a cloud-based environment is important. Cloud storage systems should allow its users to dynamically join and leave the storage service. Further, the rights of the users to access the data should be changed accordingly. Recentl...

Full description

Saved in:
Bibliographic Details
Published inIEICE Transactions on Information and Systems Vol. E99.D; no. 7; pp. 1933 - 1936
Main Authors PARK, Seunghwan, LEE, Dong Hoon
Format Journal Article
LanguageEnglish
Published The Institute of Electronics, Information and Communication Engineers 2016
Subjects
ciphertext update
cloud-based identity-based proxy re-encryption
key revocation
revocable identity-based encryption
Online AccessGet full text

Cover

More Information
Summary:Designing secure revocable storage systems for a large number of users in a cloud-based environment is important. Cloud storage systems should allow its users to dynamically join and leave the storage service. Further, the rights of the users to access the data should be changed accordingly. Recently, Liang et al. proposed a cloud-based revocable identity-based proxy re-encryption (CR-IB-PRE) scheme that supports user revocation and delegation of decryption rights. Moreover, to reduce the size of the key update token, they employed a public key broadcast encryption system as a building block. In this paper, we show that the CR-IB-PRE scheme with the reduced key update token size is not secure against collusion attacks.
ISSN:0916-8532
1745-1361
DOI:10.1587/transinf.2016EDL8042