Suppose Alice wants to generate a public-private key pair for public key encryption.
Pick all the desirable properties of the public key encryption system. (Marks may be deducted for wrong choices.)

Question

Suppose Alice wants to generate a public-private key pair for public key encryption.   
 Pick all the desirable properties of the public key encryption system.  (Marks may be deducted for wrong choices.)

Answer

If Bob knows Alice's public key it should be hard for him to encrypt a message for Alice.

Answer

It should be easy for Alice to generate a public-private key pair.

Answer

It should be easy for Bob to determine the decryption key if he knows the public key, the message, and the ciphertext.

Answer

It should be easy for Alice to decrypt a message sent to her encrypted using her public key.

Crowdly

Suppose Alice wants to generate a public-private key pair for public key encrypt...

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