Question 1

An improvement over the Caesar cipher is based on ____________ substitution.

Accepted Answer

multi-alphabet

Question 2

Which is a block cipher developed by Belgian researchers and providing 128-,192-,and 256-bit key sizes?

Accepted Answer

A) AES 
B) Blowfish 
C) DES3 
D) RSA 
A) AES 
B) Blowfish 
C) DES3 
D) RSA A

Question 3

XOR is a mathematical operation on performed on ____________ numbers that results in the basis for data encryption.

Accepted Answer

binary

Question 4

Which is a public key encryption standard developed by three mathematicians in 1977 that provides very high but slow security?

Accepted Answer

A) AES 
B) DES 
C) DES3 
D) RSA 
A) AES 
B) DES 
C) DES3 
D) RSA

Question 5

Which is NOT a part of a step in the XOR operation of encryption method.

Accepted Answer

A) Convert message text to ASCII 
B) Convert ASCII to binary 
C) XOR binary numbers with a key 
D) XOR ASCII with a key 
A) Convert message text to ASCII 
B) Convert ASCII to binary 
C) XOR binary numbers with a key 
D) XOR ASCII with a key

Question 6

The ____________ cipher is a very old encryption method used by ancient Romans.

Accepted Answer

The answer of The ____________ cipher is a very old...

Question 7

Which is a powerful password cracker that works on Windows and Linux platforms?

Accepted Answer

A) Brutus 
B) John the Ripper 
C) Quantum Cracker 
D) Solarwinds 
A) Brutus 
B) John the Ripper 
C) Quantum Cracker 
D) Solarwinds

Question 8

Information about an individual or organizational identity,their public key,and its expiration date is contained in a digital certificate issued by a(n)____________.

Accepted Answer

certificat

Question 9

Which is NOT an encryption method?

Accepted Answer

A) AES 
B) ASCII 
C) DES 
D) PGP 
A) AES 
B) ASCII 
C) DES 
D) PGP

Question 10

Which is a weakness of Data Encryption Standard?

Accepted Answer

A) It is based on a 1970s era block cipher. 
B) It's complexity in scrambling text makes it very processor-intensive and slow. 
C) The key must be transmitted,thus risking it being compromised. 
D) Throughput is minimal,making it a poor choice for large files. 
A) It is based on a 1970s era block cipher. 
B) It's complexity in scrambling text makes it very processor-intensive and slow. 
C) The key must be transmitted,thus risking it being compromised. 
D) Throughput is minimal,making it a poor choice for large files.

Question 11

Many encryption techniques such as XOR are easily broken because:

Accepted Answer

A) brute force techniques can break them 
B) their basis in binary numbers makes them easy targets for math processors 
C) their public keys are readily available 
D) the underlying letter and word frequency can still be determined 
A) brute force techniques can break them 
B) their basis in binary numbers makes them easy targets for math processors 
C) their public keys are readily available 
D) the underlying letter and word frequency can still be determined

Question 12

Which is NOT a way in which quantum physics might improve encryption in the future?

Accepted Answer

A) Computers based on quantum physics would be much faster. 
B) If someone tried to read a key without authorization,it could result in destruction of the key. 
C) Transferring keys would be immune to interference with subatomic particles. 
D) Transferring keys could be based on changing states of subatomic particles. 
A) Computers based on quantum physics would be much faster. 
B) If someone tried to read a key without authorization,it could result in destruction of the key. 
C) Transferring keys would be immune to interference with subatomic particles. 
D) Transferring keys could be based on changing states of subatomic particles.

Question 13

Operations not found in normal math that can be performed on binary numbers include all of the following EXCEPT:

Accepted Answer

A) AND 
B) OR 
C) NOT 
D) XOR 
A) AND 
B) OR 
C) NOT 
D) XOR

Question 14

Changing a message in a such a way that it can be read easily by the intended recipient but cannot be read easily by any intercepting party is called ____________.

Accepted Answer

The answer of Changing a message in a such a...

Question 15

Which is a symmetric block cipher developed in 1993 that provides variable-length key sizes ranging from 32 to 448 bits?

Accepted Answer

A) AES 
B) Blowfish 
C) DES3 
D) IDEA 
A) AES 
B) Blowfish 
C) DES3 
D) IDEA

Question 16

Attempting to determine a password by simply trying every possible combination within the set parameters until successful is called:

Accepted Answer

A) authentication auditing 
B) brute force 
C) password cracking 
D) password recovery 
A) authentication auditing 
B) brute force 
C) password cracking 
D) password recovery

Question 17

Limiting failed log in attempts minimizes the possibility that attackers will eventually determine a password while using software that repeatedly tries a large range of possibilities in a(n)____________ attack.

Accepted Answer

The answer of Limiting failed log in attempts minimizes the...

Question 18

A free,non-commercial,symmetric block cipher called ____________ uses a variable-length key ranging from 32 to 448 bits.

Accepted Answer

The answer of A free,non-commercial,symmetric block cipher called ____________ uses...

Question 19

Which type of encrypted communication is most common?

Accepted Answer

A) Computer and Internet communications 
B) Radio communications 
C) Telephone conversations 
D) Written documents 
A) Computer and Internet communications 
B) Radio communications 
C) Telephone conversations 
D) Written documents

Question 20

A(n)____________ is actually data attached to a file or e-mail to provide verification of the identity and\or origin of the file or e-mail.

Accepted Answer

The answer of A(n)____________ is actually data attached to a...

An improvement over the Caesar cipher is based on ____________ substitution.

Which is a block cipher developed by Belgian researchers and providing 128-,192-,and 256-bit key sizes?

XOR is a mathematical operation on performed on ____________ numbers that results in the basis for data encryption.

Which is a public key encryption standard developed by three mathematicians in 1977 that provides very high but slow security?

Which is NOT a part of a step in the XOR operation of encryption method.

The ____________ cipher is a very old encryption method used by ancient Romans.

Which is a powerful password cracker that works on Windows and Linux platforms?

Information about an individual or organizational identity,their public key,and its expiration date is contained in a digital certificate issued by a(n)____________.

Which is NOT an encryption method?

Which is a weakness of Data Encryption Standard?

Many encryption techniques such as XOR are easily broken because:

Which is NOT a way in which quantum physics might improve encryption in the future?

Operations not found in normal math that can be performed on binary numbers include all of the following EXCEPT:

Changing a message in a such a way that it can be read easily by the intended recipient but cannot be read easily by any intercepting party is called ____________.

Which is a symmetric block cipher developed in 1993 that provides variable-length key sizes ranging from 32 to 448 bits?

Attempting to determine a password by simply trying every possible combination within the set parameters until successful is called:

Limiting failed log in attempts minimizes the possibility that attackers will eventually determine a password while using software that repeatedly tries a large range of possibilities in a(n)____________ attack.

A free,non-commercial,symmetric block cipher called ____________ uses a variable-length key ranging from 32 to 448 bits.

Which type of encrypted communication is most common?

A(n)____________ is actually data attached to a file or e-mail to provide verification of the identity and\or origin of the file or e-mail.

Introduction to Network Security

Types of Attacks

Fundamentals of Firewalls

Firewall Practical Applications

Intrusion-Detection Systems

Virtual Private Networks

Operating System Hardening

Defending Against Virus Attacks

Defending Against Trojan Horses,spyware,and Adware

Security Policies

Assessing a System

Security Standards

Choosing Defense Strategies

Filters

Exam 6: Encryption

An improvement over the Caesar cipher is based on ____________ substitution.

Which is a block cipher developed by Belgian researchers and providing 128-,192-,and 256-bit key sizes?

XOR is a mathematical operation on performed on ____________ numbers that results in the basis for data encryption.

Which is a public key encryption standard developed by three mathematicians in 1977 that provides very high but slow security?

Which is NOT a part of a step in the XOR operation of encryption method.

The ____________ cipher is a very old encryption method used by ancient Romans.

Which is a powerful password cracker that works on Windows and Linux platforms?

Information about an individual or organizational identity,their public key,and its expiration date is contained in a digital certificate issued by a(n)____________.

Which is NOT an encryption method?

Which is a weakness of Data Encryption Standard?

Many encryption techniques such as XOR are easily broken because:

Which is NOT a way in which quantum physics might improve encryption in the future?

Operations not found in normal math that can be performed on binary numbers include all of the following EXCEPT:

Changing a message in a such a way that it can be read easily by the intended recipient but cannot be read easily by any intercepting party is called ____________.

Which is a symmetric block cipher developed in 1993 that provides variable-length key sizes ranging from 32 to 448 bits?

Attempting to determine a password by simply trying every possible combination within the set parameters until successful is called:

Limiting failed log in attempts minimizes the possibility that attackers will eventually determine a password while using software that repeatedly tries a large range of possibilities in a(n)____________ attack.

A free,non-commercial,symmetric block cipher called ____________ uses a variable-length key ranging from 32 to 448 bits.

Which type of encrypted communication is most common?

A(n)____________ is actually data attached to a file or e-mail to provide verification of the identity and\or origin of the file or e-mail.

Introduction to Network Security

Types of Attacks

Fundamentals of Firewalls

Firewall Practical Applications

Intrusion-Detection Systems

Virtual Private Networks

Operating System Hardening

Defending Against Virus Attacks

Defending Against Trojan Horses,spyware,and Adware

Security Policies

Assessing a System

Security Standards

Choosing Defense Strategies

Filters