Scalable Storage Scheme from Forward Key Rotation

Chunbo Ma; Jun Ao; Jianhua Li

Paper 2007/211

Scalable Storage Scheme from Forward Key Rotation

Chunbo Ma, Jun Ao, and Jianhua Li

Abstract

Kallahalla et al. presented a RSA-based Forward Key Rotation mechanism in secure storage scheme PLUTUS to ensure that the key used for encrypting updated files is related to the keys for all files in the file group. The encryption scheme based on Forward Key Rotation is such a scheme that only the authorized person is allowed access to the designated files and the previous versions. In this paper, we present a Forward Key Rotation storage scheme based on discrete logarithm and prove its security under random oracle model. Moreover, we propose another improved Forward Key storage scheme from pairing on elliptic curves. Compared to the scheme presented by Kallahalla et al., our scheme uses relatively short keys to provide equivalent security. In addition, the re-generated keys can be verified to ensure that the keys are valid in the improved scheme.

Metadata

Available format(s): PDF
Category: Applications
Publication info: Published elsewhere. Unknown where it was published
Contact author(s): machunbo @ sjtu edu cn
History: 2007-06-18: revised; 2007-06-05: received; See all versions
Short URL: https://ia.cr/2007/211
License: CC BY

BibTeX

@misc{cryptoeprint:2007/211,
      author = {Chunbo Ma and Jun Ao and Jianhua Li},
      title = {Scalable Storage Scheme from Forward Key Rotation},
      howpublished = {Cryptology ePrint Archive, Paper 2007/211},
      year = {2007},
      note = {\url{https://eprint.iacr.org/2007/211}},
      url = {https://eprint.iacr.org/2007/211}
}