Which on the following statements about symmetric cryptography is false? (D).
A - The key must be secure shared between the sender and recipient. TRUE B - The algorithm that uses the key to transform data is not considered part of the security system. - TRUE. C - It's undemanding on system resources to encrypt and decrypt information. TRUE D - It's often used to exchange symmetric keys so that faster symmetric encryption can be used. FALSE.
Folks could you please talk more about options C and D.
Tks in advance!!
SCJP | SCWCD | SCBCD | SCWSD 5 | SCEA (I) 1.4 | SCEA 5 | IBM SOA 669
Symmetric-key algorithms are generally much less computationally intensive than asymmetric key algorithms. In practice, asymmetric key algorithm are typically hundreds to thousands times slower than a symmetric key algorithm.
This explains why C is true. And D is false because actually the asymmetric encryption is used during SSL handshake to exchange symmetric keys. The second part of the sentence D is true - symmetric keys are later used as such an encryption method is faster
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