2.1 The Caesar Cipher with a shift of THREE is: (Select the correct answer and write down only the question number and the alphabetic letter as your answer.) (2) a. FOURPMATSMITHSTREET b. whhuw vkwlpvwpsuxri irxuspdwvplwkvwuhhw c. d. irxuspdwvplwkvwuhhw 2.2 The final cipher text (derived from 2.1) and then applying FOUR-column columnar transposition cipher is: (Select the correct answer and write down only the question number and the alphabetic letter as your answer.) a. irxuspdwvplwkvwuhhwx b. irxuspdwvplwkvwuhhw c. whhuwvkwlpvwdpsuxri d. isvkhrppvhzdlwwuwwux QUESTION 3 Use table 1 to answer the following questions: Table 1 FLX_ID 0001 0002 0003 0004 0005 FLX_Name Charles Thabo Jane Felix Mary FLX_Gender M M F M F FLX_City Cape Town Cape Town Pretoria Pretoria Pretoria FLX_TB Status Positive Positive Negative Positive Positive FLX_Financial FLX_Period Aid 2000 2000 0 0 6000 (2) ~203~ A direct and indirect attack can be applied to derive sensitive information from table 1. Which one of the following statements is correct? (Select the correct answer and write down only the question number and the alphabetic letter as your answer.) (2) a. A direct attack (List FLX_Name where FLX_Gender = F and FLX_TB_Status = Positive) could reveal that Mary, a female, is positive for TB. b. An indirect attack using SUM could reveal that individuals in Pretoria are receiving the least financial aid. C. An indirect attack (List FLX_Name where FLX_Gender = F and FLX_TB_Status = Positive) could reveal that Mary, a female, is positive for TB. d. An indirect attack using AVE could reveal that individuals in Pretoria are receiving no financial aid.