Digital Signatures

jdreddjdredd Member Posts: 33 ■■□□□□□□□□
One of the questions on the second practice exam (35 questions) referred to digital signatures. "Digital signatures for email messages are encrypted hash values that digitally sign the email to verify the sender. What is the signing part of the process?" The correct answer was "a. Encrypting the message with someones private key" and the explanation was "The actualy 'signing' of the message means that it was encrypted with someones private key."

I thought that you could sign a message without encrypting it? Another option was Hashing the message with the systems private key, although this didn't seem exactly right because in some cases you use your own private key.

Anyway, I am unclear about this.


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