Explain block ciphers and stream ciphers

Assignment Help Computer Networking

Reference no: EM133084289

Cyber Security Problem Sheet

Question 1. Briefly explain a basic cryptographic system using a diagram.

Question 2. Describe the difference between symmetric and asymmetric encryption techniques. Give example for each type. The examples should include the followings
o Sizes of keys
o Computing power required to encrypt/decrypt

Question 3. Explain block ciphers and stream ciphers with examples.

Question 4. Suppose a symmetric cipher is to be used to provide confidentiality for messages sent within an organisation.
a) How many keys are required for two people to communicate confidentially using a symmetric cipher?
b) How many keys are required for five people to communicate confidentially using a symmetric cipher, such that any two of the five people can communicate securely?
c) How many keys are required for ten people to communicate confidentially using a symmetric cipher, such that any two of the ten people can communicate securely?

Question 5. Provide brief description on the followings.
o Digital signature
o Certificate Authorities

Reference no: EM133084289

Questions Cloud

Covered interest rate parity violations : Which market participants are most likely to benefit from covered interest rate parity (CIRP) violations?

Define health care marketing : Assume that you work in a large health care organization that offers health services to the broader community. Define health care marketing.

What is the phenomenon called : -Health officials have suggested that the spread of AIDS in Houston can be partly contained if more males used condoms while engaging in sexual intercourse.

Describe the online business : Describe the online business. Identify your target market and the customer profile. Compare your idea to the competitors

Explain block ciphers and stream ciphers : Explain block ciphers and stream ciphers with examples and How many keys are required for two people to communicate confidentially using a symmetric cipher

Explain mitigation strategies for each threat : Explain mitigation strategies for each threat after evaluating he likelihood and impact and Create a short description of each cyber security threat described

Explain the function of a price in market economy : 1. In a short paragraph, define what a price signal is. Describe the type of signal that producers high price would get if there was a and a low price. Then, de

Describe the roles of the base station : What virtualisation software used at Fed Uni, to host guest server operating systems and Describe the differences between type 1 and type 2 Virtualisation

Information systems development topic selection : Discuss the advantages and disadvantages of the waterfall approach to system development. What are the 4 different kinds of feasibility that must be assessed?

User Account

All Pages