A one-to-one function and its inverse can be used to make information secure. The function is used to encrypt a message, and its inverse is used to decrypt the encrypted message. The following numerical values are assigned to each letter of the alphabet:

A

1

B

2

C

3

D

4

E

5

F

6

G

7

H

8

I

9

J

10

K

11

L

12

M

13

N

14

O

15

P

16

Q

17

R

18

S

19

T

20

U

21

V

22

W

23

X

24

Y

25

Z

26

Using the function f(x)=3x-1, the message HELLO would be encrypted 23 14 35 35 44 since H corresponds to 8 and f(8)=3(8)-1=23, etc.

This week, each student is to use a one-to-one function to encode a word or phrase that relates to some topic that we have covered in this class. Post your function and your encrypted message to the discussion forum by selecting "Add a new discussion topic" below. Label the Subject with your name.

Then, choosefouroneof your classmate's posts to decrypt.Select a message that has not already been decoded.You will need to first find your classmate's inverse function, explaining carefully how you determined it. Then decrypt the message.Putallof this information in your reply post.Use your 3 remaining comments to branch off and discuss any topics and terminology of this course in order to help each other review for the final exam.