Apple Fingerprints, Keychain: Why Randomness Matters
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This week, Apple's announcement of the new iPhone 5S with an integrated biometric fingerprint reader for device access has got a lot of attention. Instead of requiring users to type a password to get access to their devices, the fingerprint reader, dubbed "Touch ID" is the password.
I've been using biometric devices for authentication for a long time, and the sad reality is that in large-scale deployments, they often fail for a number of reasons. I see Touch ID as a convenience and usability feature, rather than as a new security feature.