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PKI Fundamentals |
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- What is Public Key Infrastructure?
- Components of a PKI
- What is a Digital Certificate?
- What is Encryption?
- General Operation
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Digital Signature
- Bob creates a message.
- Bob selects the message to be digitally signed in the
email client he is using.
- A hash function is enacted, creating a message digest
from the message. The message digest is then encrypted by
Bob’s private key. Thus the Digital Signature is created.
NOTE: Bob’s public key is sent with the message and is part
of the PKI Fundamentals.
- The message is then sent to Stephanie.
- Stephanie’s hash function creates a message digest from
the message. Stephanie’s message digest is checked against
Bob’s message digest, which is stored in Bob’s public key.
- Since both message digests match, Stephanie knows that
the message has not been altered and that Bob is the true
originator of the message.
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