How the symmetric encryption can be taken to the cloud security and big data security?
PKI allows the exchange of shared keys for symmetric encryption. So you will use asymmetric during the initial handshake and .symmetric encryption afterwards
The most efficient approach is to use asymmetric key encryption to distribute the secret key for the symmetric key algorithm, and then use symmetric key encryption for fast, voluminous data transfer. Symmetric key algorithms are simply faster.
http://www.differencebetween.com/difference-between-symmetric-and-vs-asymmetric-encryption/
Cloud is mainly used to store large amount of data and to for analysis on the stored data. Security of data and information while in transit over an unsecured medium like internet is critical for every application. Due to the volume of data, it is time consuming to implement asymmetric encryption for communication. Symmetric encryprion is more faster than asymmetric. But both parties in communication should be aware of the symmetric key. So we make use of asymmetric encryption to secuely transfer the symmetric key. This key is used for encrypting the further communications.
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