6. John would like to produce a message digest of a 2,048-byte message he plans to send to Mary.

If he uses the SHA-1 hashing algorithm, what size will the message digest for this particular

message be?

A. 160 bits

B. 512 bits

C. 1,024 bits

D. 2,048 bits

7. Which one of the following message digest algorithms is considered flawed and should no longer

be used?

A. SHA-1

B. MD2

C. MD4

D. MD5

give answer with explanation 6 or 7