 network byte order and without any
   padding.

4.3. Requirements

   A server compliant with this specification:

      1. SHOULD NOT allow a user to use the same value for their
         seed and secret pass phrase.
      2. MUST disable all OTP access to any principal whose
         sequence number would be less than one
      3. MUST decrement the sequence number if a reinitialization
         response includes a valid current-OTP, but the server is
         unable to successfully process the new-param