Use the similar encryption procedure to decrypt the password.
Procedure
Place the encrypted string in the command prompt instead of the text password. For example,
$MQ_HOME/bin>passwordEncryptDecryptTool.bat "cfMrxokzKTm3zJJLpDW7Jg==".
After entering the encrypted string as an input, the utility returns the original decrypted password. In this case,
tibco123.
Warning: You must specify the double quotation marks ('') for the text password or an encrypted password, else the utility does not perform encryption or decryption.