There is a good post in the Agile forum about the potential of using Touch ID with 1Password on iOS. Until Apple opens this up to third parties it is all academic but it looks like they are at least considering the possibilities.  

I’ve read a few of the articles about spoofing Touch ID and they all seem pretty difficult and at this point it seems to me far superior to a 4 digit unlock code.  These are, granted, early days with this technology so it will be interesting to see where this goes over the next year. 

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