Question
Bob has a public-private key pair (pub_Bob, pri_Bob). Alice needs to send some information to Bob. She wants to make sure that when Bob opens
Bob has a public-private key pair (pub_Bob, pri_Bob). Alice needs to send some information to Bob. She wants to make sure that when Bob opens the message, he can verify that this is from Alice but not anyone else. So she sends out the message as: [ Alice, Epub_Bob(message) ] to Bob. Basically, she first sends out her name in clear text, then encrypts the message with Bobs public key. Please discuss, can an attacker M impersonate Alice and send out a packet in Alices name? How can he do it? Here we assume that M also has the public key of Bob. For the same question, if Alice sends out [ Epub_Bob(Alice, message) ], can M still impersonate Alice? (Here Alice puts her name in the encryption.)
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started