Symmetric
No.It is asymmetric.
A sponge is not symmetric, therefore is referred to as asymmetric.
There are 2 types of cryptography such as: 1- Symmetric-key or Secret key Cryptography 2- Asymmetric-key or Public key Cryptography
Some have symmetry , but not all !!! Square, Rectangle, Rhombus, Kite all have symmetry. A trapezium can be both asymmetric, and symmetric.
Asymmetric
Symmetric
No, it could be another asymmetric relation.
No.It is asymmetric.
use/ application
A sponge is not symmetric, therefore is referred to as asymmetric.
Mostly for performance - symmetric encryption is much much faster (order of magnitudes) than asymmetric encryption.
No. The star makes it asymmetric in the horizontal axis.
Asymmetric is the opposite of symmetric
Symmetric means that the design of the image is balanced and both sides are equal. An asymmetric image is when the design does not repeat itself so if you fold it in half the designs will not meet in the same areas.
Symmetric cryptography uses the same secret (private) key to encrypt and decrypt its data whereas asymmetric uses both a public and private key. Symmetric requires that the secret key be known by the party encrypting the data and the party decrypting the data. Asymmetric allows for distribution of your public key to anyone with which they can encrypt the data they want to send securely and then it can only be decoded by the person having the private key. This eliminates the need of having to give someone the secret key (as with symmetric encryption) and risk having it compromised. The issue with asymmetric is that it is about 1000 times slower than symmetric encryption which makes it impractical when trying to encrypt large amounts of data. Also to get the same security strength as symmetric, asymmetric must use strong a stronger key than symmetric. If you do a quick search on the differences between symmetric and asymmetric you can find many more explanations. This just a quick overview.
PKI must use asymmetric encryption because it is managing the keys in many cases. This implies the use of public and private key pairs, which is asymmetric.