以下关于完美向前保护（PFS）的说法，错误的是（ ） 。A.PFS的英文全称是Perfect Forward Secrecy B.PFS是指即使攻击者破解了一个密钥，也只能还原这个密钥加密的数据，而不能还原其他的加密数据 C.IPSec不支持PFS D.要实现PFS必须使用短暂的一次性密钥
以下关于完美向前保护（PFS）的说法，错误的是（ ） 。
A.PFS的英文全称是Perfect Forward Secrecy B.PFS是指即使攻击者破解了一个密钥，也只能还原这个密钥加密的数据，而不能还原其他的加密数据 C.IPSec不支持PFS D.要实现PFS必须使用短暂的一次性密钥
相关考题：
Which statement contains the correct parameters for a route－based IPsec VPN?() A. [edit security ipsec] user@host# show proposal ike1-proposal { protocol esp; authentication-algorithm hmac-md5-96; encryption-algorithm 3des-cbc; lifetime-seconds 3200; }policy ipsec1-policy { perfect-forward-secrecy { keys group2; } proposals ike1-proposal; } vpn VpnTunnel { interface ge-0/0/1.0; ike { gateway ike1-gateway; ipsec-policy ipsec1-policy; } establish-tunnels immediately; }B. [edit security ipsec] user@host# show proposal ike1-proposal { protocol esp; authentication-algorithm hmac-md5-96; encryption-algorithm 3des-cbc; lifetime-seconds 3200; } policy ipsec1-policy { perfect-forward-secrecy { keys group2; } proposals ike1-proposal; } vpn VpnTunnel { interface st0.0; ike { gateway ike1-gateway; ipsec-policy ipsec1-policy; } establish-tunnels immediately; }C. [edit security ipsec] user@host# show proposal ike1-proposal { protocol esp; authentication-algorithm hmac-md5-96; encryption-algorithm 3des-cbc; lifetime-seconds 3200;} policy ipsec1-policy { perfect-forward-secrecy { keys group2; } proposals ike1-proposal; } vpn VpnTunnel { bind-interface ge-0/0/1.0; ike { gateway ike1-gateway; ipsec-policy ipsec1-policy; } establish-tunnels immediately; }D. [edit security ipsec] user@host# show proposal ike1-proposal { protocol esp; authentication-algorithm hmac-md5-96; encryption-algorithm 3des-cbc; lifetime-seconds 3200; }policy ipsec1-policy { perfect-forward-secrecy { keys group2; } proposals ike1-proposal; } vpn VpnTunnel { bind-interface st0.0; ike { gateway ike1-gateway; ipsec-policy ipsec1-policy; } establish-tunnels immediately; }
17、海龟函数中向前移动forward（)也可以简写成fd（)。