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Pro Several authentication strategies
FIDO develops and supports not only fingerprint scanners but also iris scanners and any other biometric methods.
Pro Supported by Windows 10
Microsoft has announced that Windows 10 devices will be supporting FIDO for their authentication.
Con Users may find fingerprint or iris scanners a breach of their privacy
There have been various complaints when Apple or Samsung released their mobile devices with fingerprint scanners. Especially now that many companies have been discovered that have not been trustworthy with their users data and have been releasing said data to third parties without permission. This can make future users hesitant to use this technology.