The update also revoked several digital certificates improperly issued in mid-2011 by TurkTrust, a Turkish "certificate authority," or CA. While Google, Microsoft and Mozilla had previously revoked those same certificates, this was Apple's first move. It has yet to update Safari for OS X to do the same.
Today's update was the third for iOS 6, although the first two were minor refreshes that either fixed a handful of security flaws (November's iOS 6.0.1) or addressed a single issue ( December's iOS 6.0.2).
Owners of the iPhone 3GS, iPhone 4, iPhone 4S and iPhone 5; iPad 2, third- and fourth-generation iPad, and iPad Mini; and iPod Touch fourth-generation and later can retrieve 6.1 over the air by tapping the "Settings" icon, then the "General" tab, and finally "Software Update."
Gregg Keizer covers Microsoft, security issues, Apple, Web browsers and general technology breaking news for Computerworld. Follow Gregg on Twitter at @gkeizer, on Google+ or subscribe to Gregg's RSS feed. His email address is email@example.com.
Read more about ios in Computerworld's iOS Topic Center.