Definitions Authentication ·消息认证/报文的鉴别 身份认证 Message authentication has no timeliness Entity authentication happens in real time 双向和单向认证 復大辱软件学院5 Definitions Authentication • 消息认证/报文的鉴别 • 身份认证 – Message authentication has no timeliness – Entity authentication happens in real time • 双向和单向认证