Subject: [Sipping] Comments on sip-guid-00

From: "Eric Burger" <[email-masked]>
Date: Sun, 29 Feb 2004 14:49:55 -0500

First, a statistics issue.  I disagree that the time, in of itself, has quite the properties asserted.  For example, given a billion UA's, if they have a 15-minute clock drift with a Normal distribution, well over 3,000 of them will think it is the same time in any given 5-minute window.

That is still pretty good odds, but not the one-in-a-trillion asserted.  This gets worse if the UA's have random number generators that have a correlation with their notion of time (e.g., time is used as a salt, boot at the same time with the same salt, etc.).  [Yes, I did Monte Carlo simulations a lifetime ago...]

The text goes through the algorithm for generating a GUID, but then the example has what looks like an IP address in it.  Is that a proper interpretation?  Where does the 10.33.15.8 come from?

_______________________________________________
Sipping mailing list  https://www1.ietf.org/mailman/listinfo/sipping
This list is for NEW development of the application of SIP
Use [email-masked] for questions on current sip
Use [email-masked] for new developments of core SIP