“Key equivalence and why it's bad”, at Educated Guesswork

My IAB colleague Eric Rescorla, at Educated Guesswork, has posted the first of a series — what promises to be a good series — on key-equivalent–based authentication. Check out the series.
 

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Update, 12 Apr: The three-part series is finished.

Links to the entries:

1. Key equivalence and why it's bad (I)
2. Key equivalence II: Symmetric Cryptography
3. Key equivalence III: Asymmetric Techniques