1 An icsa white Paper

Create message hash
and encrypt only hash
with private key.
83502758
Unencrypted
hash of msg
This is
the
original
text.
8u3ofdjgh
djc9d_j3$
Encrypted
hash of msg
This is
the
original
text.
8u3ofdjgh
djc9d_j3$
Encrypted
hash of msg
Create message hash
and decrypt only hash
with public key…
83502758
Unencrypted
hash of msg
83502758
Newly computed
hash of msg
. . . and now compare
the two hashes
SENDER
RECIPIENT
Figure 6. How the PKC Uses Hashes to Check Authenticity and Integrity.