2. ・ 3 sentences from the article
● Information security is provided on
computers and over the Internet
by a variety of methods.
● The Greek historian Plutarch wrote,
for example, about Spartan generals
who sent and received sensitive
messages using a scytale, a thin
cylinder made out of wood.
3. ・The important thing about a hash value
is that it is nearly impossible to derive
the original input number without
knowing the data used to create the
hash value.
4. ・Why are these sentences
important?
・The ssentence is very important .
First sentence is explaining about
encryption works .There are a whole lot
of information .Fof example,Credit-card
information,Social
Securitynumbers,Private
correspondence,Personal
details,Sensitive company
information,Bank-account information .
5. ・Secound sentences is writing about
symmetric key.User uses individual
secret key ( cord ).It is sent over the
network to another computer ,and the
key join another secret key.This way is
very safety and very convenient.
・Third sentences is writing about
hashing algorithm. The key in pbulic
key encryption is usig on a hash
value.A hashing algorithm is usig it of all
others.It is important for us to
6. to derive the original input number
without knowing the data used to create
the hash value.
So,I think that the 3 sentences are
important.
