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Exam 12: Cryptography

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Question 1

Multiple Choice

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Which function ensures that a sender and receiver cannot deny sending or receiving a specific message?

A) Authentication
B) Nonrepudiation
C) Availability
D) Integrity

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Question 2

Multiple Choice

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Cryptography is the process of converting plaintext,which is readable text,into unreadable or encrypted text called which if the following?

A) ciphertext
B) cleartext
C) maskedtext
D) subtext

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Question 3

Multiple Choice

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In what type of attack does the attacker need access to the cryptosystem,and the ciphertext to be decrypted to yield the desired plaintext results?

What is an encryption algorithm?

What type of attack is being conducted when the attacker has messages in both encrypted form and decrypted forms?

Match each item with a statement below. -Uses two keys: one to encrypt data and one to decrypt data

What is Triple Data Encryption Standard (3DES)?

What encryption algorithm can be used for both encryption and digital signing,uses a one-way function,and is still widely used in e-commerce?

Which of the following is the process of converting ciphertext back into plaintext?

Which of the following is a range of allowable values that is used to generate an encryption key?

Which of the following is a scripting language for Windows and Linux that performs repetitive tasks,such as password cracking?

What type of attack is being performed when an attacker intercepts the initial communications between a Web server and a Web browser while forcing a vulnerable server to insecurely renegotiate the encryption being used down to a weaker cipher?

If a security expert decides to study the process of breaking encryption algorithms,they are performing which of the following?

When an attacker has access to a password file,they can run a password-cracking program that uses a dictionary of known words or passwords as an input file.What type of attack is this attacker performing?

What is a certificate?

What is a digital signature?

Match each item with a statement below. -The use of random data alongside plaintext as an input to a hashing function so that the output is unique

How can confidentiality and authentication be achieved using public key cryptography?

Match each item with a statement below. -Used to find the same hash value for two different inputs and reveal any mathematical weaknesses in a hashing algorithm

Which of the following refers to verifying the sender or receiver (or both) is who they claim to be?