Although traffic analysis, tempest attacks, viruses and Trojan horses are all useful techniques for gathering
information, cryptanalysts realize that their real goal is to
find a way of cracking the RSA cipher, the cornerstone of
modern encryption. The RSA cipher is used to protect the
most important military, diplomatie, commercial and
criminal communications - exactly the messages that
intelligence gathering organizations want to decipher.
- The Code Book,
Simon Singh
How is information presented in this passage?
Information is revealed chronologically.
Information is organized around the central idea that
the RSA cipher is extremely strong.
The text uses vivid descriptions with a storytelling
style to explain events,

Breaking RSA code is the greatest challenge for cryptanalysts.

Explanation:

Breaking RSA code is the greatest challenge for cryptanalysts.

some attention getter quotes to support your thesis regarding brain work could be the following: :

a. storage capacity of your brain is virtually unlimited.

b. your brain produces sufficient electricity to light-up a small bulb.

c. different brain circuits are involved with reading aloud or silently.

d. your brain by itself does not feel pain.

e. reading allows your brain to download info directly.

f. brains of two musicians performing together can synchronize.

the figurative meanings of these lines are questioning the tyger's strength and beauty. the meaning contributes to the overall message of them poem because it is explaining how strong the tyger is.

now just elaborate off of that. : )