Reading Comprehension: Detail Function Questions

The author of the passage most probably discusses ciphers in order to

Incorrect. The main topic of the passage is steganography, not encryption.

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Although ciphers are a means of encryption, it seems that the author is using them to tell us something about steganography rather than about encryption.

Incorrect.

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If the author wanted to promote encryption over steganography, he or she wouldn't have (a) pointed out a major flaw of encryption, which is that ciphers can be broken, and (b) claim that steganography would be a much cleverer way to protect messages.

Incorrect.

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The author clearly states that steganography would be a much cleverer way to protect messages. Therefore, he or she does not discuss ciphers to show that they are better than steganography. 

Incorrect.

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The author discusses ciphers to promote steganography rather than to question its effectiveness. Let's look at a stripped down version of the sentence again

However, (i.e., as opposed to what we discussed so far)

as (/because) ciphers can be broken, (they are less effective, so)

perhaps steganography is much cleverer.

The author is promoting steganography on the account of the inherent vulnerability of ciphers, and not the other way around.

Very good!

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The author uses the fact that ciphers can be broken (thereby eliminating the protection provided by encryption) to introduce us to another method of message protection, called steganography.

present steganography through a vulnerability of encryption
introduce encryption, which is the main topic of the passage
support the claim that encryption is preferable to steganography
show that even though ciphers are not perfect, they are better than steganography
expose the inherent vulnerability of steganography

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