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ECCouncil 212-81 Practice Test - Questions Answers, Page 8

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List of questions

Question 71

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Which of the following are valid key sizes for AES (choose three)?

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Question 72

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A cipher is defined as what

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Question 73

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A measure of the uncertainty associated with a random variable.

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Question 74

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Which of the following is a type of encryption that has two different keys. One key can encrypt the message and the other key can only decrypt it?

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Question 75

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Which of the following is a substitution cipher used by ancient Hebrew scholars?

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Question 76

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A transposition cipher invented 1918 by Fritz Nebel, used a 36 letter alphabet and a modified Polybius square with a single columnar transposition.

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Question 77

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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.

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Question 78

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Cryptographic hashes are often used for message integrity and password storage. It is important to understand the common properties of all cryptographic hashes. What is not true about a hash?

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Question 79

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John is going to use RSA to encrypt a message to Joan. What key should he use?

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Question 80

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A _____ is a function that takes a variable-size input m and returns a fixed-size string.

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Related questions

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.
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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.
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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?
John is going to use RSA to encrypt a message to Joan. What key should he use?
3DES can best be classified as which one of the following?