secured hash algorithm

The Hashed Message Authentication Code (HMAC) _____.

• encrypts only the message

• encrypts only the key

• encrypts the key and the message

• encrypts the DHE key only

What is the latest version of the Secure Hash Algorithm?

• SHA-2

• SHA-3

• SHA-4

• SHA-5

Which of the following key exchanges uses the same keys each time?

• Diffie-Hellman-RSA (DHRSA)

• Diffie-Hellman Ephemeral (DHE)

• Diffie-Hellman (DH)

• Elliptic Curve Diffie-Hellman (ECDH)

Proving that a user sent an email message is known as _____.

• non-repudiation

• repudiation

• integrity

• availability

A(n) _____ is not decrypted but is only used for comparison purposes.

• key

• stream

• digest

• algorithm

Which of these is NOT a characteristic of a secure hash algorithm?

• Collisions should be rare.

• A message cannot be produced from a predefined hash.

• The results of a hash function should not be reversed.

• The hash should always be the same fixed size.

If Bob wants to send a secure message to Alice using an asymmetric cryptographic algorithm, which key does he use to encrypt the message?

• Alice's private key

• Bob's public key

• Alice's public key

• Bob's private key

Illya was asked to recommend the most secure asymmetric cryptographic algorithm to his supervisor. Which of the following did he choose?

• SHA-2

• ME-312

• BTC-2

• RSA

A website has a digital certificate issued by a Certificate Authority (CA). The session key generated for the SSL session between a browser and the server hosting the website is encrypted using ___________ .

• A) The CA’s public key.

• B) The CA’s private key.

• C) The public key that comes with the digital

  certificate.

• D) The CA’s public key.

Which of the following is not contained in a digital certificate?

• A) Public key.

• B) Session key.

• C) Validity period.

• D) Hash algorithm.