Decode or encode .txt messages based on character mapping located in a .csv file. Currently can only encode or decode English letter characters and not other symbols such as ., !, etc. It will also keep capital lettering the same as the original message.
For example, the following message: "Hello. This is a test message to see if this works. If you are reading this, then it does."
Will be encoded to: "Gdkkn. Sghr hr z sdrs ldrrzfd sn rdd he sghr vnqjr. He xnt zqd qdzchmf sghr, sgdm hs cndr.""
Using the following character mapping:
a,z
b,a
c,b
d,c
e,d
f,e
g,f
h,g
i,h
j,i
k,j
l,k
m,l
n,m
o,n
p,o
q,p
r,q
s,r
t,s
u,t
v,u
w,v
x,w
y,x
z,y
Click on the link below to view the code on GitHub.