Mala sends a text file mystikz.txt to his friend Coki, along with a digital signature of the file, and Mala's digital certificate.

On this exam, the text Mala_priv{ msg } is an abbreviation for "the result of the text msg being encrypted with Mala's private key," and MD5{ foo } is an abbreviation for "the MD5 hash of the text foo"

Which of the following choices best represents the structure of the digital signature of mystikz.txt

Mala_pub{MD5{mystikz.txt}}

MD5{Mala_pub{mystikz.txt}}

Mala_pub{MD5{Mala_priv{mystikz.txt}}}

Mala_priv{MD5{mystikz.txt}}

MD5{Mala_priv{mystikz.txt}}

Mala_priv{MD5{Mala_pub{mystikz.txt}}}