(Reuters) – Yahoo Inc said it will join Google Inc to create a secure email system by next year that could make it nearly impossible for hackers or government officials to read users messages, The Wall Street Journal reported. The move comes as large technology companies unite to beef up their defenses against government intrusion and hacking, most notably after Edward Snowden exposed last year the National Security Agencys mass surveillance programs. Google, Microsoft and Facebook Inc moved to encrypt internal traffic after revelations by Snowden that the spy agency hacked into their connections overseas. Yahoo has altered its email process so users adopting encryption type messages in a separate window, preventing even Yahoo from reading the messages as they are typed, the Journal said.