[cryptography] skype backdoor confirmation

Jeffrey Walton noloader at gmail.com
Mon Jul 15 02:06:13 EDT 2013

On Thu, May 16, 2013 at 3:52 PM, Adam Back <adam at cypherspace.org> wrote:
> So when I saw this article
> http://www.h-online.com/security/news/item/Skype-with-care-Microsoft-is-reading-everything-you-write-1862870.html
> I was disappointed the rumoured skype backdoor is claimed to be real, and
> that they have evidence.  The method by which they confirmed is kind of odd
> - not only is skype eavesdropping but its doing head requests on SSL sites
> that have urls pasted in the skype chat!
Sorry to dig up an old thread....

According to [1], Skype provided the backdoor before Microsoft
purchased the service (but interception increased after M$'s

The NSA also praised the collaboration with the FBI in the case of
messaging and VoIP service Skype. According to the documents, Skype
joined PRISM in early 2011, before it was acquired by Microsoft. That
takeover is alleged to have resulted in a redoubling of efforts to
enable PRISM to access Skype communications. According to the NSA, in
July 2012, the volume of intercepted Skype data tripled following the
introduction of new surveillance capability. There have been repeated
rumours of backdoors in Skype intended to enable encrypted
communications to be intercepted by the security services. Skype has
always denied these reports.

[1] http://www.h-online.com/security/news/item/Microsoft-gave-NSA-s-PRISM-access-to-Skype-Outlook-com-and-SkyDrive-1916730.html

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