Firms must relook what, how they share online
Organizations that are looking to tap or use the file hosting sites to share documents with business associates should be wary of the type of content they put online and appropriate policies to protect Data providers such cloud.
While the file hosting sites are useful to enable the sharing of files that can not be sent by e-mail because of limits on mail servers, users and companies must be diligent, said Ronnie Ng, Director of Systems Engineering at Symantec Singapore.
Confidential business should be sent via an alternative channel such as FTP (File Transfer Protocol), he noted in an e-mail.To further improve the protection of security, encryption and password can be seen, Ng said.
His advice follows the publication of a study of 88 sites hosting files by a group of university researchers, which found that many such sites generate uniform resource identifiers (URI) in a predictable way. These identifiers are unique secret links used by the owner of a document to share a file. The study results were released at the 4th Usenix Workshop on Large-scale Exploits and emerging threats earlier this year.
The five researchers from Belgium and France claimed that in less than a month, they were able to disclose hundreds of thousands of private files. At the same time, by uploading some test "honey files" to a number of these sites, they also found that attackers were actively accessing private data.
Symantec's Ng cautioned that, given the risks highlighted in the report, the use of file-sharing sites can lead to the loss, misuse or theft of company data.Organizations that do make use of cloud services such must understand that the property of the privacy and security is shared between the provider and the organization, he added.
"It is the responsibility of an organization to ensure that the policies of the provider of data privacy are either aligned or strengthened to ensure compliance," he said.
He added that organizations should, among other things, best practices, define clearly what information is sensitive or proprietary in their policy of data protection for the cloud, as well as tools and procedures for classifying information to company.
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A third provider, he added, lamented that making changes to generate more secure URIs would "negatively affect" the performance of the site and did not implement any, despite the researchers' offer of alternatives to increase security without impacting
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