Problem:

a) Explain what you understand by the term brute force attack, giving an example of such an attack

b) Briefly outline the concept of Caesar cipher and identify any associated weaknesses.

c) Explain what you understand by encryption/decryption and state on what two things the security of encrypted data is entirely dependent.

d) Explain briefly what SSL (Secure Socket Layer) is and how it can be applied to e-banking services to ensure security?

e) Briefly explain what a Digital Certificate is and how it is used in conjunction with PKI (Public Key Infrastructure)?

f) Explain how asymmetric key encryption ensures both confidentiality and authenticity.