In short, the ZIP format uses an encryption algorithm. Encryption is simply the use of an algorithm called Cipher to encrypt information so that no one else can see it.
The encryption format AES-128 (Advanced Encryption Standard) used in RAR archives is more secure than the encryption format used in ZIP. Therefore, if you are going to encrypt sensitive data, you should use the RAR archive format more. Here’s what you need to know about zip and RAR formats.