Fibonacci Cipher
The Fibonacci cipher walks the Fibonacci sequence out to the middle of the alphabet and back: 1, 1, 2, 3, 5, 8 … 233, then mirrors down again to 1.
Letter values
a
1
b
1
c
2
d
3
e
5
f
8
g
13
h
21
i
34
j
55
k
89
l
144
m
233
n
233
o
144
p
89
q
55
r
34
s
21
t
13
u
8
v
5
w
3
x
2
y
1
z
1