Below we show the decoder disc for the Caesar cipher shifting by 3 characters.
Click on the arrows
⤿
or
⤾
to turn the inner disc and decrease or increase the shift.
Shift by 3 characters
Shift by 11 characters
From the disc we can read of the images of J
at the elements of the domain of J
J(-)=x,
J(a)=y,
J(b)=z,
J(c)=-,...,
J(x)=u
J(y)=v
J(z)=w
We encrypt the word
chariot
with this Caesar cipher that shifts by 3 characters. We have
J(c)=-,
J(h)=e,
J(a)=y,
J(r)=o,
J(i)=f,
J(o)=l,
J(t)=q,
Thus we encrypt chariot as
-eyoflq
(b) Decryption
The images of the inverse J-1 of J
at the elements of the codomain of J are
J-1(-)=c,
J-1(a)=d,
J-1(b)=e,
J-1(c)=f,...
J-1(x)=-,
J-1(y)=a,
J-1(z)=b
We decrypt
qebxafbxfpx-ypq
with this Caesar cipher that shifts by 3 characters. We have
J-1()=t,
J-1()=h,
J-1()=e,
J-1()=-,
J-1()=d,
J-1()=i,
J-1()=s,
J-1()=c,
J-1()=a
Thus the plain text is
the-die-is-cast
