In the last few months the number of passwords, pass phrases, pin codes and other personal identification mechanisms I’ve had to use (and endure) has grown dramatically. Every site I sign up for has a different set of requirements for passwords, and those requirements are growing ever more complicated. And if I don’t use the site all that regularly (like, say, three times a day!) I pretty soon forget the password I had to set up, unless I choose one that is common amongst all sites. And we’re all told …