Modify the code in Table 11.5 so that it is immune to a linearization attack. Note that the resulting program must take exactly the same amount of time to execute for any incorrect input. Hint: Do not...

Modify the code in Table 11.5 so that it is immune to a linearization attack. Note that the resulting program must take exactly the same amount of time to execute for any incorrect input. Hint: Do not use any predefined functions (such as stremp or strnemp) to compare the input with the correct serial number.