Forgot your Sharepoint Farm passphrase ?

This can happen to you . But no worries You can’t retrieve it, but you can reset it using PowerShell.

Make sure the account you are logged in as is

• A farm admin and
• local admin on server

$passphrase = ConvertTo-SecureString -asPlainText –Force
Set-SPPassPhrase -PassPhrase $passphrase –Confirm

For more info : http://technet.microsoft.com/en-us/library/ff607568.aspx