Encryption techniques are used to securely transmit data over networks. Pseudorandom noise adds statistical randomness to encrypted signals. Data encryption converts plaintext into unreadable ciphertext. Link encryption encrypts data as it is transmitted between network points. A virtual private network (VPN) uses encryption to create a secure connection over public lines like the internet and allow private network extension.

1. How Encryption For Strong Security
Works
● Pseudoramdom Noise
● Data Encryption
● Link Encryption
● VPN
s1170132 Manamu Abe
s1170133 Keigo Amma
s1170144 Ryo Kanno
s1170145 Masataka Kubota

2. Pseudoramdom Noise
● In cryptography,
pseudorandom noise
(PRN) is signal similar
to noise which satisfies
one or more of the
standard test for
statistical randomness.

3. Data Encryption
● Data encryption
is a process in
which plaintext
data is
converted into
ciphertext so
that it cannot be
read.

4. Link Encryption
● Link encryption is the
data security process
of encrypting
information at the
data link level as it is
transmitted between
two points within a
network.

5. VPN
●VPN(Virtual Private
Network) is service to
connect data
communications
between systems.
●
We can use public
lines like common
carrier leased lines with
VPN

6. REFERENCE
 Pseuderandom Noise
http://dimtel.com/_media/support/notes/tek00012.png?w=&h=&cache=cache
http://en.wikipedia.org/wiki/Pseudorandom_noise
 Data Encryption
http://www.wisegeek.com/what-is-data-encryption.htm
http://www.filibeto.org/sun/lib/nonsun/oracle/11.1.0.6.0/B28359_01/network.111/b28530/asotrans.htm
 Link Encryption
http://searchsecurity.techtarget.com/sDefinition/0,,sid14_gci526309,00.html
http://www.palowireless.com/bluearticles/cc1_security1.asp
 VPN
http://en.wikipedia.org/wiki/Vpn
http://computer.howstuffworks.com/enlarge-image.htm?terms=vpn+-phantom&page=0