Question 11 (1 point)

Using public key encryption is computationally faster than using symmetric key encryption.

Question 11 options:

	True
	False

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Question 12 (1 point)

The major long-term problem in developing effective encryption methods has been

Question 12 options:

	developing effective scrambling methods
	generating random keys
	distributing keys in a secure manner
	keeping the scrambling method secret

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Question 13 (1 point)

When using a public key encryption method, the message receiver needs to

Question 13 options:

	securely send his/her public key to the message sender.
	securely send his/her private key to the message sender.
	make his/her public key available in an open, non-secure manner.
	know the size of the sender's public key

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Question 14 (1 point)

A hash algorithm is a one-way function.

Question 14 options:

	True
	False

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Question 15 (1 point)

Alice sends Bob a plaintext contract. When Bob receives the contract, he wants assurance that Eve did not change the contract during transmission. What actions can Alice and Bob take so that Bob receives the assurance he is seeking.

Question 15 options:

	Alice can create a signed digest with her private key and send the digest and the contract to Bob. Bob then creates a digest of the contract, decrypts Alice's digest with Alice's public key, and compares his digest to Alice's digest. If the digests are identical, then Bob has assurance that the contract was not altered during transmission.
	Alice can create a signed digest of the contract with her private key and send the digest to Bob. Bob can then decrypt the digest with Alice's public key.
	Alice can create a signed digest with Bob's public key and send the digest and the contract to Bob. Bob then creates a digest of the contract, decrypts Alice's digest with his private key, and compares his digest to Alice's digest. If the digests are identical, then Bob has assurance that the contract was not altered during transmission.
	Alice and Bob can agree to use the RSA encryption method to protect the contract.

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Question 16 (1 point)

Using one of the publicly known secure hash algorithms, a digest is created from a one-page letter. If the size of the digest in bits is compared to the size of the letter in bits,

Question 16 options:

	the size of the digest
	a comparison cannot be determined since the digest size in bits will be random
	the size of the digest > the size of the letter
	the size of the digest = the size of the letter