Design and implement your own encryption system capable of encrypting and decrypting messages. Once finished, answer the following questions:

$1-$Describe your encryption method and provide an example. $[2$ marks$]$

$2-$Is your cryptosystem symmetric or asymmetric based? How can the sender and the

receiver know the keys? $[2$ marks$]$

$3-$Encrypt the plaintext $$Its me$$ using the proposed cryptosystem. $[1$ mark$]4-$Is the proposed cryptosystem secure$?$ Can the key or plaintext be retrieved by an

attacker? $[2$ marks$]$