which encryption technique is more secure for a string?

Which technique can be used to encrypt a string like 'Hello' and at the other end it can be decrypted . How can I implement it in MATLAB 2019a. Thanks

[Rik]

Have a read here and here. It will greatly improve your chances of getting an answer.

You may also want to read this thread, as discussion of cryptography is not always allowed on this forum.

[Balkar Singh]

Ok Sir. Thanks