Re: data point - anonymous E.164 number usage, enum-trial@localhost, enum-l@localhost
- Date: Fri, 27 Feb 2004 08:24:20 +0100
At 01:16 27.02.2004, James Seng wrote:
During discussion of validation rules, one proposal which came up was to
require proof of identity for mobile users.
And the point is?...
For prepaid anonymous SIM cards, this would have meant that more data and
effort is required for validation of the ENUM domain than for aquiring the
underlying phone service itself. Plus, the resulting data, even if
collected, would have no reference data set to be compared to. And: this
applies to quite many subscribers.
Or, to put it differently - any validation effort shall keep the underlying
service data requirements and available data quality in perspective, or it
might result in collecting useless data at high cost.
I'm sure there are many more examples where subscriber identity proof is of
limited use - telcos might not care as much if you are James Seng, but they
care about you paying the bill.
Michael Haberler wrote:
In the context of validation of numbers for ENUM, I have tried to
estimate the amount of mobile users which have totally anonymously bought
a prepaid SIM card, or in other words, users of E.164 numbers which have
no trace at all in a phonebook or other records.
In the EU, all countries except Germany, Hungary and Italy permit totally
anonymous purchase of prepaid SIM cards. This indicates that about 65% of
the EU population have access to anonymous mobile service (even in Italy,
just a taxpayer code is needed which is not subscriber data but allows to
track down a user for law enforcement - but lets leave that out for the
sake of argument; in France I understand a record is made for purposes of
recovering a lost SIM card but not for proof of identity).
There are about 400 Million mobile users in Europe, and penetration of
prepaid is about 40%. Assuming that nobody registers if he doesnt have
to, and multiplying those figures a ballpark estimate is that *there are
about 100 Million E.164 numbers in use in Europe without any subscriber
data just through the use of prepaid SIM cards.