The two parties encode confidential data in a form that is not directly readable by the other party.双方以某种形式将机密数据加密, 这样对方就不能直接读取。

The ability to read German encoded military messages was of inestimable help to the Allies in winning the war.能够破译德国军用密码电文对同盟国赢得战争的胜利帮助巨大。