Discussion 1

Write a short response to the following:

Explain the concept of cryptography.

What are the various types of cryptography?

Summarize the mechanisms that make up a strong cryptosystem and how the cryptosystem could be used to secure a system.

Discussion 2

Some countries block traffic from the Internet. In fact China is most famous for it. They literally have modified their routers that manage the traffic into and with in their country to block certain types of traffic and monitor the rest. Here is more on that:

http://www.expatfocus.com/c/aid=2593/articles/general/ten-countries-that-restrict-internet-usage/

http://www.usatoday.com/story/news/world/2014/02/05/top-ten-internet-censors/5222385/

If countries can block traffic, why cannot they block malware and threats?