Cryptography Reference
In-Depth Information
Diagram 7.2 SHA-1 Processing of 512-Bit Block
H
1
H
2
H
3
H
4
H
5
X
j
:
0
≤
j
≤
19
→
Round 1: Steps
j
=0
,
1
,...,
19
for
i
=1
A B C D E
X
j
:
20
≤
≤
→
j
39
Round 2: Steps
j
=20
,
21
,...,
39
for
i
=2
A B C D E
X
j
:
40
≤
j
≤
59
→
Round 3: Steps
j
=40
,
41
,...,
59
for
i
=3
A B C D E
X
j
:
60
≤
≤
→
j
79
Round 4: Steps
j
=60
,
61
,...,
79
for
i
=4
A B C D E
+
+
+
+
+
H
1
H
2
H
3
H
4
H
5
160
-bit Message Digest
Search WWH ::
Custom Search