Switch -P[pwd] - set password
Set a password <pwd> to encrypt files during archiving or to decrypt during extracting. The password is case-sensitive. If you omit the password in the command line, you will be prompted to enter it.
In the shell mode a password may be entered through Enter default password dialog or in the Archive name and parameters dialog.
Example
add the contents of the folder "games" to the archive "secret", using the password ZaBaToAd
WinRAR a -pZaBaToAd -r secret games\*.*
Notes
- if you wish to achieve real security do not use a password shorter than 8 characters or one which is easy to guess;
- do not forget your passwords or your data will be completely lost.