[Mip4] Does MIP support RegReq authentication without having to do timekeeping?

Alexandru Petrescu <alexandru.petrescu@gmail.com> Thu, 14 March 2013 17:21 UTC

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Date: Thu, 14 Mar 2013 18:21:02 +0100
From: Alexandru Petrescu <alexandru.petrescu@gmail.com>
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Subject: [Mip4] Does MIP support RegReq authentication without having to do timekeeping?
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MIP4 participants,

I would like to learn whether Mobile IPv4 spec supports an
authentication scheme for RegReq/RegRep which does not rely on timekeeping.

Let me explain why.

We use a Mobile Router in a moving network that gets connected to the
Home Agent.  The Mobile Router's power supply may be turned off (its
battery dies out after an extended period of inactivity, like in a
vehicle).  At that point the MR looses its time.

When it finally wakes up, it has to perform a Registration Req/Rep with
the HA, without assuming that its time is correct.  Or, the MIP4
regreq/regrep HA implementation that we use seems to rely on having the
right time, otherwise the registration fails.

Under these conditions, is it possible to use an auth mechanism which
does not rely on timekeeping?

Alex