Internet 2010 in numbers " , business report by Pingdom, Inc. Available online at: http://royal.pingdom.com, 2011. ,
Facebook Statistics " , business report by Facebook, Inc. Available online at, 2010. ,
Available online at, RFC IETF Network Working Group, 1939. ,
RFC 3501: Internet Message Access Protocol ? Version 4rev1 Available online at, 2003. ,
DOI : 10.17487/rfc3501
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.179.184
A face(book) in the crowd, Proceedings of the 2006 20th anniversary conference on Computer supported cooperative work , CSCW '06, 2006. ,
DOI : 10.1145/1180875.1180901
RFC 4880: OpenPGP Message Format Available online at, 2007. ,
DOI : 10.17487/rfc4880
RFC 3156: MIME security with OpenPGP Available online at, 2001. ,
DOI : 10.17487/rfc3156
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.179.1009
RFC 2177: IMAP4 IDLE command Available online at, 1997. ,
DOI : 10.17487/rfc2177
Fact Sheet Available online at: http://newsroom.fb.com/content/default ,
RFC 6120: Extensible Messaging and Presence Protocol (XMPP): Core Available online at, 2011. ,