We know that, according to cryptographic scientists, encryption is a powerful, when the minimum key length is equal to the length of the text. In my encryption algorithm, I want to use four keys, 2 keys on the recipient side, And 2 keys on the sender's side, (of course, the keys on the sender's side are the same as the initial value). The length of the keys can be unlimited. Does using four keys make the algorithm stronger, or it become overhead ?

of course our my method is very faster then AES,DES,...