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Blown to Bits Chapter 5 Notes questions and answers already psssed 2024
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Blown to Bits Chapter 5 NotesEncryption - correct answer ✔the art of encoding messages so they can't be
understood by
eavesdroppers or adversaries into whose hands the messages might fall
De-scrambling an encrypted message requires knowing the sequence of
symbols - correct answer ✔the "key"
USA PATRIOT Act - correct answer ✔gave the FBI sweeping new powers to
combat terrorism; does not mention encryption. U.S. authorities have made no
serious attempt to legislate control over cryptographic software since Gregg's
proposal
-allowing greater government access to electronic communications and other
information; criticized by some as violating civil liberties
explosion of commercial transactions - correct answer ✔-Congress suddenly
realized that it had to
allow banks and their customers to use encryption tools, as well as airlines
and
their customers, and eBay and Amazon and their customers.
-Anyone using the Internet for commerce needed the protection that
encryption provided.
-millions of such people that the entire U.S. and world economy depended on
public confidence in the security of electronic
transactions
Why is encryption so important to Internet communications? - correct answer
✔answer lies in the Internet's open architecture
, Packets - correct answer ✔-Bits move through the
Internet not in a continuous stream, but in discrete blocks
-consists of about 1500 bytes, no more
- like postcards, with everything exposed
for anyone to see
routers - correct answer ✔-As the packets move through the Internet, they
are steered on their way by computers
-located at the switching points
-Every data packet gets handled at every router: stored, examined, checked,
analyzed, and sent on its way
Encryption was no longer a munition; it was
money. - correct answer ✔State Department demanded that an encryption
researcher register as an international arms
dealer. Now suddenly, encryption was less like a weapon and more like the
armored cars used to transport cash on city streets, except that these
armored cars were needed by everyone.
public-key cryptography - correct answer ✔-became possible for every man,
woman, and child to transmit credit card numbers to Amazon more securely
than any general had been able to communicate military orders fifty years
earlier, orders on which the fate of nations depended
-two young mathematicians, operating outside the intelligence community that
was the center of cryptography research, published a paper that made a
reality out of a seemingly absurd scenario: Two parties work out a secret key
that enables them to exchange messages securely—even if they have never
met and all their messages to each other are in the open, for anyone to hear
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