Whichtwostatementsregardingasymmetrickeyencryptionaretrue？（）
A.Thesamekeyisusedforencryptionanddecryption.
B.Itiscommonlyusedtocreatedigitalcertificatesignatures.
C.Itusestwokeys：oneforencryptionandadifferentkeyfordecryption.
D.Anattackercandecryptdataiftheattackercapturesthekeyusedforencryption