Signing a Message with PGP

}

Unsigned, plaintext

document

Generate hash

code using MD5

Generate signature

using RSA

Carol

sender’s private key

Digital signature

added(MD5/RSA)

using sender’s

private key

sender’s private

key ring

Encrypt session

key using RSA

Receiver supplies

pass phrase

message

signature

step1: PGP fetches the sender's private key from the private key ring

using your wanted USER ID .

step2: PGP prompts user for pass phrase to recover your private

key encrypted by your session key.

step3: The signature of the message is generated .