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Jan Dietz

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Posts posted by Jan Dietz

  1. You can use any auth app, it doesn't need to communicate with anything after setup. The extra security benefit it the 'something you have' part of authentication.

     

    The key stays on your phone and together with the current time it comes up with a predictable number the server can verify.

     

    Recording a bunch of numbers doesn't help you deduct the key, so you will need to hold the actual device (unlocked) in order to identify yourself. It's a nice extra layer of protection beyond just a password which regularly gets stolen :)

     

    There are three common factors used for authentication:

    • Something you know (such as a password)
    • Something you have (such as a smart card)
    • Something you are (such as a fingerprint or other biometric method)
  2. Just wondering if there's an actual need for a push button at all (I understand with the given lowish resistance given), but why not permanently wire in a 1K or so resistor 1/4W and a red LED? This will trickle charge the caps on the inverter, and all failure modes are accounted for:

     

    - Short: LED is bright

    - Resistor bypassed: LED fails open

     

    If you're paranoid you can add a car fuse 5A or so.

     

    Mind you for me 5V is the 'high voltage rail' so I may be missing something ????

     

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