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WikiPedia: VPSKeys http://googleonlinesecurity.blogspot.com/2010/03/c... http://siblog.mcafee.com/cto/vietnamese-speakers-t... http://www.nytimes.com/2010/04/01/world/asia/01vie... http://vps.org/xinloi_vpskey.html http://www.vps.org/ http://www.bbc.co.uk/vietnamese/vietnam/2010/03/10... http://www.mofa.gov.vn/vi/tt_baochi/pbnfn/ns100405...