Digital Signature: Receiver

DS

Received Plaintext

MD

MD

1.

2.

Hash

Decrypt with

True Party’s

Public Key

3.

Are they Equal?

Hash the received

plaintext with the same

hashing algorithm the

sender used. This gives

the message digest

2. Decrypt the digital

signature with the sender’s

public key. This also should

give the message digest.

3. If the two match, the

message is authenticated;

The sender has the true

Party’s private key

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