Password reset for all usernames

Dear Users,
due to a recent hacker attack we need to reset the password of all the usernames on our HPC systems (Fermi, Eurora, PLX).
In few hours from now (May 28, 2014 in the afternoon) you will receive an email from superc@cineca.it with the subject "Important message from CINECA" containing the new password.
For further security we kindly ask you to change this random generated password as soon as possible using the "passwd" command. We also ask you not to use old passwords, since they are considered unsafe. Please, choose a new password that has never been used on our systems.
We also inform you that all the content of the .ssh folder in your home directory will be deleted. This imply that the "SSH Public Key Authentication" access needs to be restored.

We apologize for the inconvenient.

Best regards,
HPC User Support @ CINECA