Which three statements about SCEP are true? (choose three)
A.
The certificate request format uses PKCS#10
B.
Cryptographically signed and encrypted message are conveyed using PKCS#7
C.
It supports multiple cryptographic algorithms including RSA
D.
CRL retrieval is supported though CDP (certificate distribute point) queries
E.
It support synchronous granting
F.
It supports online certification revocation