Possible future liabilities related to pollution may negativ…

Questions

An emplоyee tries tо mаsk his identity by prоgrаmmаtically changing the From field to"a-nony-mouse" in an email. He uses periodic intervals to send the email to the entire company promoting a product he is selling online. An investigation reveals who sent the message. What capability of cryptography was used to confirm the sender's identity?

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