Alice receives an email with a signed document from Bob. She verifies the digital signature using Bob's public key and finds it valid. This ensures that the document was:
- Authenticated
- Encrypted
- Not tampered with
- Sent securely
When Alice verifies the digital signature using Bob's public key, it ensures that the document was not tampered with. Digital signatures provide data integrity, and if the signature is valid, it means the document has not been altered since it was signed by Bob.
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