Coordinated Group Authentication

Step 1

Step 2

C

C

C

C

C

C

A/DK

DK

DK

DK

DK

A

• Assume a server can only authenticate a subset of users.

• Protocol:

  • All servers are queried to see if any can authenticate the user.
  • Each server returns either a positive authentication or DK (don’t know).
  • One positive answer is sufficient.

Previous slide

Next slide

Back to first slide

View graphic version