While sending a signed message, a sender
a. sends message key using public key encryption using DES and hashed message using public key encryption
b. sends message using public key encryption and hashed message using DES
c. sends both message and hashed message using DES
d. sends both message and hashed message using public key encryption
a. sends message key using public key encryption using DES and hashed message using public key encryption
b. sends message using public key encryption and hashed message using DES
c. sends both message and hashed message using DES
d. sends both message and hashed message using public key encryption