Question about key encryption

Assignment Help Data Structure & Algorithms

Reference no: EM1380347

Assume Alice wishes to send an e-mail to Bob. Bob has a public private key pair, and Alice has Bob's certificate. But Alice does not have a public, private key pair. Alice and Bob (and the entire world) share the same hash function.

[1] In this condition, is it possible to design a scheme so that Bob can verify that Alice created the message? If so, show how with a block diagram for Alice and Bob.

[2] Is it possible to design a scheme that provides confidentiality for sending the message from Alice to Bob? If so, show how with a block diagram for Alice and Bob.

Reference no: EM1380347

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