Sometimes,you have downloaded or created a lot of files.No doubt, you need to compress these files in order to save your space.Both the rar and zip are compression algorithms to compress your files so that their size decrease.You may wonder what is the difference between rar and zip.Rar uses winrar,zip uses winzip and winrar,As my opinion Rar is better than zip as it compresses files upto 15% while zip compresses upto 8%.The following article is mainly tell about how to password protected rar file and how to decrypt password protected rar file if you have lost the password.