Cryptography Reference
In-Depth Information
2.
L
(
d
j
=
F
(
R
(
d
j
)
R
(
d
j
.
⊕
3.
SW
(
R
(
e
j
,L
(
e
)
).
j
Lastly, unswap the last pair, then execute,
L
(
d
)
17
=
R
(
d
)
16
P
1
and
R
(
d
)
⊕
=
17
L
(
d
)
16
⊕
P
2
. Diagrams 3.4 and 3.5 illustrate Blowfish encryption/decryption.
Diagram 3.4 Blowfish Encryption
Plaintext (64 bits)
↓
L
(
e
0
(32 bits)
R
(
e
0
(32 bits)
L
(
e
)
0
R
(
e
)
0
P
1
→
✄
✁
+
Roun
d 1
✂
✄
✂
✁
F
→
✄
✁
R
(
e
)
1
−−−−→
+
✂
↓
R
(
e
)
1
L
(
e
)
1
L
(
e
)
1
R
(
e
)
1
.
.
.
.
.
.
P
16
→
✄
✁
+
Roun
d 1
6
✂
✄
✂
✁
F
→
✄
✁
R
(
e
)
16
−−−−→
+
↓
✂
R
(
e
)
16
L
(
e
)
16
L
(
e
)
16
R
(
e
)
16
R
(
e
)
16
L
(
e
)
16
✄
✂
✁
✄
✂
✁
P
18
→
+
+
←
P
17
L
(
e
)
17
R
(
e
)
17
Ciphertext (64 bits)
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