Which of the following statements about cryptography are true? Public-key encryp

Question

Which of the following statements about cryptography are true? Public-key encryption is more efficient than shared key encryption, in the sense that information can be encrypted and decrypted faster. Using public-key cryptography, it is possible to check that the informationen really comes from the claimed sender. With symmetric encryption, both the sender and the receiver need to know the secret key. With shared key cryptography, the shared key can be published freely. A weakness with public-key encryption is that the public key can only be used once.

Explanation / Answer

public key encryption is more efficient than shared key encryption
in the sense that information can be encrypted and decrypted faster.

Ans:True .Because it needs both private and public key.

Using public key cryptography it is possible to check that the information
really comes from the claimed sender.

Ans:true

With symmetric encryption both the sender and the receiver need to know the secret key.

Ans:True

for both the sender and receiver of a message of same secret key.

with shared key cryptography the shared key can be published freely

ans:False

The public key can be published freely.

A weakness with public key encryption is that the public key can only be used once.

True

It can be used once against security adverse.

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