58898
doi
10.5281/zenodo.58898
oai:zenodo.org:58898
user-supercloud
user-eu
Laguillaumie, Fabien
Orange Labs
Paindavoine
Marie
Verifiable Message-Locked Encryption
Canard, Sébastien
Orange Labs
info:eu-repo/semantics/openAccess
Creative Commons Attribution Non Commercial Share Alike 4.0 International
https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode
<p>One of today’s main challenge related to cloud storage is to maintain the functionalities and the efficiency of customers’ and service providers’ usual environments while protecting the confidentiality of sensitive data. Deduplication is one of those functionalities: it enables cloud storage providers to save a lot of memory by storing only once a file uploaded several times. However, classical encryption schemes block deduplication. One needs to use a “message-locked encryption” scheme (MLE), which allows the detection of duplicates and the storage of only one encrypted file on the server, which can be decrypted by any owner of the file. However, in most existing scheme, a user can bypass this deduplication protocol. In this article, we provide servers verifiability for MLE schemes: the servers can verify that the ciphertexts are well-formed. This property forces a customer to prove that she complied to the deduplication protocol, thus preventing her to deviate from the prescribed functionality of MLE. Then, we provide an MLE scheme satisfying this new security property. To achieve the deduplication consistency, our construction primarily relies on zero-knowledge proofs. Unlike Abadi et al.’s MLE, we instantiate those proofs, so<br>
that we obtain a more efficient scheme, secure in the random oracle model.</p>
Zenodo
2016-07-06
info:eu-repo/semantics/conferencePaper
639386
user-supercloud
user-eu
award_title=USER-CENTRIC MANAGEMENT OF SECURITY AND DEPENDABILITY IN CLOUDS OF CLOUDS; award_number=643964; award_identifiers_scheme=url; award_identifiers_identifier=https://cordis.europa.eu/projects/643964; funder_id=00k4n6c32; funder_name=European Commission;
1579540424.082045
615496
md5:47445e300a23056c9c634aac786f70ba
https://zenodo.org/records/58898/files/Verifiable-Message-Locked-Encryption-2016.pdf
public
isVersionOf
doi