Question

Compare and contrast symmetric and asymmetric encryption technologies, to include the advantages and disadvantages of each

Answer 1

Hey here is your answer.

   Symmetric encryption :- In this only one key is provided . which is used to both encryption and decryption. SO any 2 person or system who wants to communicate with Symmetric technology    must have to have the key file at both end to process the information. So those who don't have the shared key can not read or access the data.

       Advantages :-
           1. This kind of techniques are fast while processing the data either encryption or decryption.
           2. Main aspect of this being secure is the key the bigger the key is the more safe encryption will be against various attacks.

       Disadvantages :-
           1.Main flaw in this is how the secure key will be exchanged between 2 systems or entity. as if the key is leaked then whole algo does not have the meaning.
           2.Number of keys. as 2 systems require one key so we can say that if 4 systems decide to talk to each other then they will require 6 keys one key for each possible pair.As the number of system increases number of keys will increase.

   Asymmetric encryption :- This is different then the Symmetric one. Here keys exists is pairs(Public key and private key). That means there is one key for encryption purpose(Public key)    and other one is for decryption purpose(private key). So a sender can encrypt the message (sign the message) using private key. And the person on the other end can verify that the        message is authentic using the public key of sender. if checking is ok then they can proceed to decrypt the message using their own private key.

       Advantages :-
           1.We can detect that a message has been tempered or not. when we receive the message cross verifying it will sender public key will tell if its been tempered or not.
           2.Its easy to handle as everyone can publish their public key on various platforms and can keep private key a secret to only decrypt.
       Disadvantages :-
           1.Its process of decrypting is very slow when we compare it to symmetric one. So its not good when we have to decrypt large number of files or messages.
           2.And its risky if we loose our private key we cant decrypt messages and its irreparable.

In case of any doubt please comment. Happy Learning :)