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What is one of the advantages of using both symmetric and asymmetric cryptography in SSL/TLS?
A.
Supporting both types of algorithms allows less-powerful devices such as mobile phones to use symmetric encryption instead.
B.
Symmetric algorithms such as AES provide a failsafe when asymmetric methods fail.
C.
Symmetric encryption allows the server to security transmit the session keys out-of-band.
D.
Asymmetric cryptography is computationally expensive in comparison. However, it is well-suited to securely negotiate keys for use with symmetric cryptography.
I would say :
D. Asymmetric cryptography is computationally expensive in comparison. However, it is well-suited to securely negotiate keys for use with symmetric cryptography.
Your Option "D" is different from what you typed. Misleading. And are some phones not more powerful than some PCs? We have phones that are 8GB RAM/1 TB 6Ghz Windows Core i5.
[TLS] uses a symmetric key for bulk encryption, an asymmetric key for authentication and key exchange, and message authentication codes for message integrity
Appendix A, p.3273/3257
One of the advantages of using both symmetric and asymmetric cryptography in SSL/TLS is that asymmetric cryptography is used for secure key exchange and authentication, while symmetric cryptography is used for data encryption and decryption. Asymmetric cryptography is computationally expensive, so using it only for the initial key exchange and then switching to faster symmetric cryptography for actual data encryption provides a balance between security and performance. This approach allows secure negotiation of session keys, which are then used for symmetric encryption, which is faster and more efficient for data transmission.
D. Asymmetric cryptography is computationally expensive in comparison. However, it is well-suited to securely negotiate keys for use with symmetric cryptography.
D. Asymmetric cryptography is computationally expensive in comparison. However, it is well-suited to securely negotiate keys for use with symmetric cryptography.
Answer: D
In SSL/TLS, asymmetric cryptography is used during the initial handshake to securely exchange and negotiate session keys. Once the keys have been exchanged, symmetric cryptography is used for encrypting the data transmitted between the client and server. Symmetric encryption is more efficient and faster than asymmetric encryption, making it more suitable for bulk data encryption during the communication session.
Asymmetric cryptography is computationally expensive in comparison. However, it is well-suited to securely negotiate keys for use with symmetric cryptography.
Asymmetric Cryptography is typically used to transmit Symmetric keys due to the high resource cost associated with Asymmetric. No current devices fails between either.
Asymmetric Cryptography is typically used to transmit Symmetric keys due to the high resource cost associated with Asymmetric. No current devices fails between either.
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