最新的EC-COUNCIL Certified Encryption Specialist - 212-81免費考試真題
In steganography, ________ is the data to be covertly communicated (in other words, it is the message you wish to hide).
正確答案: C
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A linear congruential generator is an example of what?
正確答案: B
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A measure of the uncertainty associated with a random variable.
正確答案: C
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Changing some part of the plain text for some matching part of cipher text. Historical algorithms typically use this.
正確答案: D
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A symmetric Stream Cipher published by the German engineering firm Seimans in 1993. A software based stream cipher that uses a Lagged Fibonacci generator along with concepts borrowed from shrinking generator ciphers.
正確答案: D
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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.
正確答案: A
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Which of the following is a fundamental principle of cryptography that holds that the algorithm can be publicly disclosed without damaging security?
正確答案: C
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John works as a cryptography consultant. He finds that people often misunderstand the reality of breaking a cipher. What is the definition of breaking a cipher?
正確答案: B
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Which one of the following is a component of the PKI?
正確答案: A
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A part of understanding symmetric cryptography understands the modes in which it can be used. You are explaining those modes to a group of cryptography students. The most basic encryption mode is____________.
The message is divided into blocks, and each block is encrypted separately with no modification to the process.
The message is divided into blocks, and each block is encrypted separately with no modification to the process.
正確答案: A
Which one of the following uses three different keys, all of the same size?
正確答案: B
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What is a variation of DES that uses a technique called Key Whitening?
正確答案: C
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What size key does Skipjack use?
正確答案: D
In a ______ the attacker discovers a functionally equivalent algorithm for encryption and decryption, but without learning the key.
正確答案: B
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