Tags OpenSSL Heartbleed Viet Nam needs more apps using PKI Wednesday, Jun 18, 2014 Viet Nam has been using public key infrastructure (PKI) for a few years, and the country should develop more applications to take advantage of it. Online transactions are now safe: Bkav Monday, Apr 14, 2014 Users can make online transactions safely in Viet Nam without worrying about OpenSSL Heartbleed bug, said Viet Nam''s leading security company Bkav.