Enhanced Secure Thresholded Data Deduplication Scheme for Cloud Storage

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F18%3A00318915" target="_blank" >RIV/68407700:21230/18:00318915 - isvavai.cz</a>

Výsledek na webu

<a href="http://ieeexplore.ieee.org/abstract/document/7553458/" target="_blank" >http://ieeexplore.ieee.org/abstract/document/7553458/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/TDSC.2016.2603501" target="_blank" >10.1109/TDSC.2016.2603501</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Enhanced Secure Thresholded Data Deduplication Scheme for Cloud Storage

Popis výsledku v původním jazyce

As more corporate and private users outsource their data to cloud storage, recent data breach incidents make end-to-end encryption increasingly desirable. Unfortunately, semantically secure encryption renders various cost-effective storage optimization techniques, such as data deduplication, ineffective. On this ground Stanek et al. [1] introduced the concept of “data popularity” arguing that data known/owned by many users do not require as strong protection as unpopular data; based on this, Stanek et al. presented an encryption scheme, where the initially semantically secure ciphertext of a file is transparently downgraded to a convergent ciphertext that allows for deduplication as soon as the file becomes popular. In this paper we propose an enhanced version of the original scheme. Focusing on practicality, we modify the original scheme to improve its efficiency and emphasize clear functionality. We analyze the efficiency based on popularity properties of real datasets and provide a detailed performance evaluation, including comparison to alternative schemes in real-like settings. Importantly, the new scheme moves the handling of sensitive decryption shares and popularity state information out of the cloud storage, allowing for improved security notion, simpler security proofs and easier adoption. We show that the new scheme is secure under the Symmetric External Diffie-Hellman assumption in the random oracle model.

Název v anglickém jazyce

Enhanced Secure Thresholded Data Deduplication Scheme for Cloud Storage

Popis výsledku anglicky

As more corporate and private users outsource their data to cloud storage, recent data breach incidents make end-to-end encryption increasingly desirable. Unfortunately, semantically secure encryption renders various cost-effective storage optimization techniques, such as data deduplication, ineffective. On this ground Stanek et al. [1] introduced the concept of “data popularity” arguing that data known/owned by many users do not require as strong protection as unpopular data; based on this, Stanek et al. presented an encryption scheme, where the initially semantically secure ciphertext of a file is transparently downgraded to a convergent ciphertext that allows for deduplication as soon as the file becomes popular. In this paper we propose an enhanced version of the original scheme. Focusing on practicality, we modify the original scheme to improve its efficiency and emphasize clear functionality. We analyze the efficiency based on popularity properties of real datasets and provide a detailed performance evaluation, including comparison to alternative schemes in real-like settings. Importantly, the new scheme moves the handling of sensitive decryption shares and popularity state information out of the cloud storage, allowing for improved security notion, simpler security proofs and easier adoption. We show that the new scheme is secure under the Symmetric External Diffie-Hellman assumption in the random oracle model.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10201 - Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

IEEE Transactions on Dependable and Secure Computing

ISSN

1545-5971

e-ISSN

1941-0018

Svazek periodika

—

Číslo periodika v rámci svazku

99

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

694-707

Kód UT WoS článku

000438090700012

EID výsledku v databázi Scopus

2-s2.0-85049780971