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Question 1

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Software for maintaining an on-the-fly-encrypted volume. Data is automatically encrypted right before it is saved, then decrypted right after it is loaded, all w/o user intervention.

Question 2

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Which of the following statements is most true regarding binary operations and encryption?

Question 3

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A type of frequency analysis used to attack polyalphabetic substitution ciphers. It's used to try to discover patterns and use that information to decrypt the cipher.

Question 4

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Question 5

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Part of understanding cryptography is understanding the cryptographic primitives that go into any crypto system. A(n) _______ is a fixed-size input to a cryptographic primitive that is random or pse

Question 6

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The most common way steganography is accomplished is via which one of the following?

Question 7

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A _______ product refers to an NSA-endorsed classified or controlled cryptographic item for classified or sensitive U. S. government information, including cryptographic equipment, assembly, or comp

Question 8

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The reverse process from encoding - converting the encoded message back into its plaintext format.

Question 9

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Which of the following asymmetric algorithms is described by U.S. Patent 5,231,668 and FIPS 186

Question 10

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If Bob is using asymmetric cryptography and wants to send a message to Alice so that only she can decrypt it, what key should he use to encrypt the message?

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Represents the total number of possible values of keys in a cryptographic algorithm or other security measure, such as a password.

If Bob is using asymmetric cryptography and wants to send a message to Alice so that only she can decrypt it, what key should he use to encrypt the message?

Message hidden in unrelated text. Sender and receiver have pre-arranged to use a pattern to remove certain letters from the message which leaves only the true message behind.

3DES can best be classified as which one of the following?

In 2007, this wireless security algorithm was rendered useless by capturing packets and discovering the passkey in a matter of seconds. This security flaw led to a network invasion of TJ Maxx and data theft through a technique known as wardriving. Which Algorithm is this referring to?

Nicholas is working at a bank in Germany. He is looking at German standards for pseudo random number generators. He wants a good PRNG for generating symmetric keys. The German Federal Office for Information Security (BSI) has established four criteria for quality of random number generators. Which ones can be used for cryptography?

Ahlen is using a set of pre-calculated hashes to attempt to derive the passwords from a Windows SAM file. What is a set of pre-calculated hashes used to derive a hashed password called?

Which of the following is the successor of SSL?

You are studying classic ciphers. You have been examining the difference between single substitution and multi-substitution. Which one of the following is an example of a multi-alphabet cipher?

A cryptanalysis success where the attacker discovers additional plain texts (or cipher texts) not previously known.

Question 117 - 212-81 discussion

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With Cipher feedback (CFB) what happens?

A.

The key is reapplied

B.

The ciphertext block is encrypted then the ciphertext produced is XOR'd back with the plaintext to produce the current ciphertext block

C.

The block cipher is turned into a stream cipher

D.

The message is divided into blocks and each block is encrypted separately. This is the most basic mode for symmetric encryption

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asked 18/09/2024

Minh Phan

29 questions

User

Your answer: A B C D

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