Did we see symmetric key encryption used for authentication in this chapter? If so, how was it used? Describe the entries in the second row of Figure 3- 9. Comment on the strengths of the choices it...

Did we see symmetric key encryption used for authentication in this chapter? If so, how was it used? Describe the entries in the second row of Figure 3- 9. Comment on the strengths of the choices it uses.

a. For the second-to-last row of Figure 3-9, comment on the strengths of its symmetric encryption cipher and of its hashing algorithm.

b. Describe the entries in the last row of Figure 3-9. Comment on the strengths of the choices it uses.