Network Security Specialist – Fundamentals of Encryption Quiz Answers

Question: Which encryption algorithm uses a variable length symmetric key?

• RSA
• Blowfish
• DES
• PGP

Question: Which of the following is a symmetric key system using blocks?

• RSA
• DES
• PGP
• Diffie-Hellman

Question: What is the purpose of a certificate?

• To verify that software is virus free
• To guarantee that a signature is valid
• To validate the sender of a digital signature or software
• To validate the recipient of a software.

Question: Secure Multipurpose Internet Mail Extensions (S/MIME) use X.509 certificates to secure e-mail communication

• True
• False

Question: Which of the following is an encryption method developed by three mathematicians?

• PGP
• DES
• DSA
• RSA

Question: Blowfish is an asymmetric stream cipher

• True
• False

Question: Which hashing algorithm do modern Windows systems use?

• SHA1
• SHA2
• LM
• NTLM

Question: Which of the following encryption algorithms is a block cipher and uses the Rijndael algorithm?

• DES
• RSA
• AES
• NSA

Question: What is a digital signature?

• A piece of encrypted data added to other data to verify the sender
• A scanned version of your signature, often in .jpg format
• A signature that is entered via a digital pad or other device
• A method for verifying the recipient of a document

Question: Which of the following uses key sizes equal to 128, 192 and 256 bits?

• DES
• RSA
• 3DES
• AES