browsed & found this .
How To Enable Facebook Account Login History?
Copyright © Walker
07 May 2010 03:14
Facebook offers an optional account security feature allows users to be notified (by email) when the account login is done from computer or Internet devices that are never been used or acknowledged by the account owners.
Once you’ve turned on this (new) feature, Facebook will prompt you to register the computer, after the login screen but before loading the Facebook News Feed, if that computer is either never been used to login your Facebook account OR the web browser cache that contains your previous login activities has been emptied / deleted:
Enable Facebook account login activity tracking feature
1) Login to Facebook, click the Account link on the top-right corner followed by Account Settings.
2) Locate the Account Security and click Change. Select Yes and click Submit.
After turn on the Facebook Account Security feature, you (or the bad guy) will be prompted to register the new computer (as mentioned earlier) and an email alert about account login on this new registered computer will be sent to the owner’s registered email address (i.e. the one used to login to Facebook).
If you are using same login password for both the Facebook and email, then this feature is pretty useless as the bad guy would have login the registered email account too and delete that notification.
Although this feature is a bit troublesome to people (me and probably you) who regularly empty web browser cache, I personally think it is worth to be enabling. At least, the bad guy will think twice as he is prompted to register the computer used to login Facebook account that is not of him/her.
P/S: I am also looking forward Facebook to support HTTPS entirely, from the time of account login until logoff, to prevent my “precious” privacy from easily read by network sniffer as the plain-text data packets travel across the computer network.