QUESTION 1

1. An intermediate party cannot change both the data and the Message Authentication Code without the ________________ detecting that the data has been corrupted.

   		intermediate part
   		sender and receiver
   		sender
   		receiver

0.5 points

QUESTION 2

1. Message digest can verify that data ________________.

   		is complete
   		has not been tampered with
   		has traveled fast
   		has delivered to the destination

0.5 points

QUESTION 3

1. There are two main operations are performed on digital signatures, one is creating digital signature by taking a piece of data, and the scened is creating a message digest of the data and ___________________.

   		signing it with a private key
   		without signing it
   		signing it with a public key
   		signing it with a secret key

0.5 points

QUESTION 4

1. Verifying the digital signature is done by creating a message digest of the data and verifying the signed digest using a _____________.

   		secret key
   		public key
   		private key
   		the digital signature it self

0.5 points

QUESTION 5

1. ________________ method adds only the specified subset of the array of data.

   		public void update(byte[] input, int offset, int length)
   		public void update(byte[] input, int length)
   		public void update(byte[] input)
   		public void update(byte input)