 document.

References

   [<A HREF="rfc822.html">RFC 822</A>]   Crocker, D., "Standard for the Format of ARPA Internet
               Text Messages," <A HREF="rfc822.html">RFC 822</A>, August 1982.

   [<A HREF="rfc1825.html">RFC 1825</A>]  Atkinson, R., "Security Architecture for the Internet
               Protocol," <A HREF="rfc1825.html">RFC 1825</A>, August 1995.

   [<A HREF="rfc1938.html">RFC 1938</A>]  Haller, N. and C. Metz, "A One-Time Password System,"
               <A HREF="rfc1938.html">RFC 1