Question: Encryption Question: Cara is dating Dan and Evan. Cara wants to send a message to break up with Dan. Dan has been receiving lots of

Encryption Question:

Cara is dating Dan and Evan. Cara wants to send a message to break up with Dan. Dan has been receiving lots of spam email lately, so Cara wants to make sure that Dan knows the message is from her. In addition, Cara doesn't want Evan to know that she's breaking up with Dan, so she wants to encrypt the message to Dan.

How does Cara send a digitally signed and encrypted "I'm breaking up with you" message to Dan?

Assume that m = "I'm breaking up with you".

	a.	K_D^-( K_C^-(m))
	b.	K_D⁺( K_C⁺(m))
	c.	K_D⁺( K_C^-(m))
	d.	K_D^-( K_C⁺(m))

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