| Authentication |
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| • | How
does the machine know who it is |
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| talking
to??? |
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| • | Who
do I SAY that I am? |
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| • | How
can I verify that? |
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| • | Something
I know (that nobody else should know) |
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| • | Something
I have (that nobody else should have) |
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| • | Something
I am (that nobody else should be…) |
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