Facebook Boosts Security With SSL Encryption

Technology upgrade blocks Firesheep and eavesdropping attacks, but, for now, users must opt in.

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Slideshow: How Firesheep Can Hijack Web Sessions
On Wednesday, Facebook announced that its adding HTTPS, which uses SSL/TLS encryption, to secure all communications between browsers and Facebook Web servers. The move means that Facebook users will now see a lock icon or a green SSL address bar when using the Facebook site.
Previously, Facebook used HTTPS only on pages that required users to enter a password. Now, extending HTTPS to all pages means better security because tools such as
Firesheep
-- an automated browser extension able to hijack sessions with Web 2.0 sites -- as well as packet sniffers will no longer work against the site.
Theres only one catch: HTTPS wont be enabled by default. According to Facebook security engineer
Alex Rice
, we hope to offer HTTPS as a default whenever you are using Facebook sometime in the future.
In the interim, the feature will shortly -- over the next few weeks -- become available to all users. To activate it, theyll have to manually select it on the advanced security features page, which is located under the account security section of the account settings page.
Rice warned that users may see some issues, at least in the short term. Encrypted pages take longer to load, so you may notice that Facebook is slower using HTTPS. In addition, some Facebook features, including many third-party applications, are not currently supported in HTTPS. Well be working hard to resolve these remaining issues.
But based on other Web sites experiences, any slowdowns should be minor, as long as Facebook correctly implements the protocol. For example, in July 2010, Google software engineer
Matt Cutts posted
an assessment of Googles experience. In brief: If you stop reading now you only need to remember one thing: SSL/TLS is not computationally expensive anymore.
Google made HTTPS non-optional for all Gmail users in January 2010 as a way to boost security after finding that the protocol required no additional hardware and consumed very few resources. On our production frontend machines, SSL/TLS accounts for less than 1% of the CPU load, less than 10 KB of memory per connection, and less than 2% of network overhead, said Cutts.
Facebook faced criticism for not following Googles lead more quickly, especially after the arrival last year of Firesheep. Its author, Eric Butler, said he built the tool to highlight the
inherent vulnerability
of using Facebook on an unencrypted Wi-Fi network.

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Facebook Boosts Security With SSL Encryption