CLDSafe: An efficient file backup system in cloud storage against ransomware

Joobeom Yun, Junbeom Hur, Youngjoo Shin, Dongyoung Koo

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


Ransomware becomes more and more threatening nowadays. In this paper, we propose CLDSafe, a novel and efficient file backup system against ransomware. It keeps shadow copies of files and provides secure restoration using cloud storage when a computer is infected by ransomware. After our system measures file similarities between a new file on the client and an old file on the server, the old file on the server is backed up securely when the new file is changed substantially. And then, only authenticated users can restore the backup files by using challenge-response mechanism. As a result, our proposed solution will be helpful in recovering systems from ransomware damage.

Original languageEnglish
Pages (from-to)2228-2231
Number of pages4
JournalIEICE Transactions on Information and Systems
Issue number9
Publication statusPublished - 2017 Sept

Bibliographical note

Publisher Copyright:
Copyright © 2017 The Institute of Electronics, Information and Communication Engineers.


  • Cloud storage system
  • Fuzzy hashing
  • Ransomware

ASJC Scopus subject areas

  • Software
  • Hardware and Architecture
  • Computer Vision and Pattern Recognition
  • Electrical and Electronic Engineering
  • Artificial Intelligence


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