You can change the passphrase A passphrase is similar to a password, except it can be a phrase with a series of words, punctuation, numbers, white space, or any string of characters. Passphrases improve security by limiting access to secure objects, such as private keys and/or a key agent. used to protect a user key.
To change the passphrase.
Open the . dialog box
Click thetab and select a key from the list.
Click. (This button is not available if no key is selected, or if you have selected a certificate managed by either the Reflection Certificate Manager or the Windows Certificate Manager.)