Blown to Bits Chapter 5- Reflection Questions

Homework:  Read Chapter 5 in Blown to Bits (located under forms and docs in the "Blown to Bits" folder.
Answer the following reflection questions.


Share your reflections with stark.brooklinehighschool@gmail.com as well as post your reflections to your blog:
  • What is encryption?
  • What is cryptography? Provide an example.
  • What is security through obscurity? Why is it bad?
  • What is the key agreement protocol? Why is it important to Internet commerce?
  • What is a certificate? What role does it play in Internet security?
Free response: In your opinion are digital signatures more important than handwritten signatures?  Explain your opinion with good reasons

Encryption is a way of encoding messages so they can't be read by eavesdroppers. An example would be a Cesar Cipher, it is used to move letters and encode messages. Cryptography is a is the art of sending indecipherable messages. A Vigenere Cipher is a type of cryptography where letters are shifted using key words and a table to stop frequency analysis. Security through obscurity is when encryption methods becomes widespread, and this is bad because it makes it easier for people to develop a key to break the encryption. The key agreement protocol is when the sender and receiver choose a key and multiply it by a number. They also send a 3rd number which leads to the key being harder to find. A certificate is another role in Internet security that verifies who you are communicating with is actually the ones who you think you are contacting with. I believe that handwritten signatures are more secure because the person attached to it has to physically sign off giving them a better knowledge of how they write their name. People would have an easier time figuring out if this was forgery or not. Digital signatures can be duplicated making it more obscure to see if it was forgery or not. Handwritten also give a bit of personality and uniqueness off the person, making it harder to copy their signature.

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