WhichofthefollowingstatementsthatdescribeDiffieHellmanKeyexchangearecorrect?()

A.ADHkeyexchangeisanalgorithmthatutilizesasymmetriccryptographickeys.

B.TheDHkeyexchangeisusedtoestablishasharedsecretoveraninsecuremediumduringanIPSecphase1exchange.

C.TheDHexchangeissusceptibletoman-in-the-middleattacks.

D.TheDHexchangeisusedtoauthenticatethepeerdeviceduringanIPSecphase1exchange.

E.ADHexchangeprovidesPerfectForwardSecrecy（PFS）.