TestOut SecurityPro (9.4 - 9.6)

Which of the following are true of Triple DES (3DES)? (select two) (9.5 1/15)

• uses a 168-bit key

• Can easily be broken

• Is used in IPsec

• uses 64-bit blocks with 128-bit keys

• Uses the Rijndael block cipher

Which of the following is the most frequently used symmetric key stream cipher? (9.5 2/15)

• Ron's Cipher v2 (RC2)

• Ron's Cipher v4 (RC4)

• Blowfish

• Advanced Encryption Standard (AES)

Which of the following forms of cryptography is best implemented in hardware? (9.5 3/15)

• Symmetric stream

• Asymmetric

• Symmetric block

• Public key

Which of the following symmetric block ciphers does NOT use a variable block length? (9.5 4/15)

• Advanced Encryption Standard (AES)

• Elliptic Curve (EC)

• Ron's Cipher v5 (RC5)

• International Data Encryption Algorithm (IDEA)

Which of the following encryption mechanisms offers the least security because of weak keys? (9.5 5/15)

• IDEA

• AES

• TwoFish

• DES

Which version of the Rivest cipher is a block cipher that supports variable bit length keys and variable bit block sizes? (9.5 6/15)

• RC2

• RC5

• RC4

• RSA

Which of the following symmetric cryptography systems does not support a variable block size? (9.5 7/15)

• AES

• IDEA

• RC5

• Rijndael

You want to encrypt data on a removable storage device. Which encryption method would you choose to use the strongest method possible? (9.5 8/15)

• 3DES

• RSA

• SHA-1

• AES

Which of the following is the weakest symmetric encryption method? (9.5 9/15)

• Blowfish

• AES

• TwoFish

• 3DES

• DES

What type of key or keys are used in symmetric cryptography? (9.5 10/15)

• A shared private key

• Two unique sets of key pairs

• A single key pair

• A unique key for each participant