Report of SMG10 ad hoc meeting 26 October 1999, den Haag  (approved)
Source: Ansgar Bergmann

Table of contents:

0 	Opening of the meeting	1
1 	Agenda	1
2 	GPRS issues	2
3 	CTS	2
4 	LI	2
5 	LCS	2
6 	Triplet re-use	3
7 	Other issues	3
Annex A: List of participants	4
Annex B: List of documents	5
Annex C: Proposals of the ad hoc meeting for agreement by correspondence in SMG10 before SMG#30	5

0 	Opening of the meeting
Stephan Pütz, S3 Vice Chair, opened the meeting, welcomed the delegates and thanked KPN for hosting the meeting, which had been convened on short notice as an ad hoc meeting to clarify some urgent issues. The meeting did not make any decisions but rather prepare proposals for agreement by correspondence in time for SMG#30. As the SMG 10 Chairman (Mike Walker) and the SMG10 Vice Chairman (David Miles) were not able to attend the meeting, Mike Walker had asked Stephan Pütz to chair the meeting.
1 	Agenda
The following agenda was approved:
1.	Agenda
2.	GPRS issues
3.	CTS
4.	LI
5.	LCS
6.	Triplet re-use
7.	Other issues

2 	GPRS issues
•	The revised draft LS to SMG#30 on GEA-2 in AP99-118 (revision of AP99-111) will be sent to SMG10 for agreement by correspondence.
A CR to 03.20 to ensure that ciphering is mandatory for GPRS is pending.
3 	CTS
Concerning CR 01.56-A001, approved by SMG#29, it had been reported to SMG10-99#2 that the CR had been based on an unofficial version of the specification (so-called version 1.1.1) which has a lot of differences to the approved version 7.0.0. 
•	The ad hoc meeting agreed to follow the proposal in AP-99115. This proposal should be endorsed by SMG10 by correspondence: To implement the explicit changes of the CR and to add a sentence which is shown in section 8.3 of the CR (3rd bullet) even if it is not shown with revision marks; to propose to SMG10 to agree that this version becomes the official version 7.1.0. Some of the changes performed in so called version 1.1.1 might be essential. If so, corresponding CRs should be produced by SMG10, to result in a version 7.2.0. The versions 7.0.0 and 7.1.0 should remain unpublished, version 7.2.0 should be published. 
The meeting was informed that Charles Brookson (as the custodian of A5/1) will write a letter to France Telecom, the owner of the algorithm, to ask for usage of A5/1 for CTS.
4 	LI
No input.
5 	LCS
SMG10 had received a LS from T1P1 on LCS (AP-99114, forwarded by Timo Rantalainen on 21 October 08:11) in which T1P1 asks SMG10 to review the CR to 03.71 on the question whether the requirements of SMG10 are incorporated, before sending the CR to SMG#30 for approval. 
Asbørn Grøvlen (Nokia) presented AP99-117, GSM Location Standardization, AP99-116, Shortened stage 2 for Location Services, both source T1P1, as well as a LS from T1P1 on LCS in AP99-114.
Clarifications at SMG10 ad hoc: 
•	IBM had essential patents on DES. Valtteri N explained that they have expired in the mean time.
Comments at SMG10 ad hoc: 
•	Differential GPS as a basis for location services is vulnerable by attacks because a differential GPS transmitter is not difficult to build. Also the software in the mobile station could be changed to fake, e.g., E-OTD localisation.
•	See draft LS to T1P1, copy to SMG#30 in AP-99119 stating that SMG10 endorses stage 2 but that it has identified two risks (see above). The LS should be approved by SMG10 by correspondence before SMG#30.
6 	Triplet re-use
N2 had requested some minor changes to the triplet re-use CR in AP99-081. 
•	CR in 112 to be send to SMG10 for agreement by correspondence. 
Note that CRs to earlier versions are not deemed necessary, as the error is not essential.
7 	Other issues
The meeting was informed that there will be a LS from SMG10 WPB to SMG10 proposing that SMG10 WPD and the TC SEC group on LI should continue their work in a joint group.

Annex A:	List of participants
Name	Company	SDO	S3	SMG10	
Stefan Pütz, S3 Vice Chair	T-Mobil	ETSI	x	x	
Wael Adi	BOSCH TELECOM DANMARK A/S	ETSI	x	x	
Adnan Al-adnani	PANASONIC MOBILE COMMUNICATIONS	ETSI	-	-	
Stefan Andersson	ERICSSON L.M.	ETSI	-	-	
Hiroshi Aono	NTT DoCoMo	TTC	x	x	
Nigel Barnes	MOTOROLA Ltd	ETSI	-	-	
Stephen Beer	Dera	ETSI	x	x	
Colin Blanchard	BT	ETSI	x	x	
Rolf Blom	ERICSSON L.M.	ETSI	x	x	
Charles Brookson	DTI	ETSI	x	x	
Takeshi Chikazawa	Mitsubishi Electric Co.	ARIB	x	x	
Per Christoffersson	TELIA AB	ETSI	x	x	
Simon Corfield	Dera	ETSI	x	x	
Luc de Bie	Siemens Atea	ETSI	x	x	
Louis Finkelstein	Motorola	T1	x	-	
Masahiro Furuse	NTT DoCoMo	ARIB	-	-	
Günther Horn	SIEMENS AG	ETSI	x	-	
Peter Howard	VODAFONE Group Plc	ETSI	x	x	
Brian King	Motorola Inc.	T1	-	-	
Mariko Kishi	Mitsubishi Electric Co.	ARIB	-	-	
Geir Køien 	TELENOR AS	ETSI	x	x	
Michael Marcovici	Lucent Technologies	T1	x	-	
Semyon Mizikovsky	Lucent Technologies	T1		-	
Sebastien Nguyen Ngoc	France Telecom	ETSI	x	-	
Valtteri Niemi	NOKIA Corporation	ETSI	x	x	
Petri Nyberg	Sonera Corp.	ETSI	x	-	
Ludovic Rousseau	GEMPLUS Card International	ETSI	x	x	
Roland Schmitz	Deutsche Telekom AG	ETSI	-	-	
Benno Tietz	Mannesmann Mobilfunk	ETSI	x	x	
Marco Tosalli	TELECOM ITALIA S.p.A.	ETSI	-	-	
Peter Trautmann	BMWi	ETSI	x	-	
Bart Vinck	Siemens Atea NV	ETSI	x	-	
Berthold Wilhelm	BMWi	ETSI	-	-	
Ansgar Bergmann (Secretary)	ETSI	ETSI	x	x	
x = participated
Annex B:	List of documents
AP99-109	Discussion points for SMG10 ad hoc 99-10	AB	
AP99-110	Liaison statement to SMG10 on changes to GSM 09.02 to clarify triplet re-use conditions	N2	
AP99-111	draft LS to SMG#30 on GEA-2	Vodafone	
AP99-112	revised CR on triple re-use	Vodafone	
AP99-113	LS from SAGE to SMG10 on Use of Encryption algorithms for CTS	SAGE	
AP99-114	LS from T1P1 on Location Services	T1P1	
AP99-115	Problem report on GSM 01.56	AB	
AP99-116	stage 2 for LSC	T1P1	
AP99-117	T1P1.5 LCS slides	T1P1	
AP99-118	revised draft LS to SMG#30 on GEA-2	SMG10 ad hoc	
AP99-119	draft LS to T1P1, cc SMG on LCS	SMG10 ad hoc	
AP99-120	[reserved 		
Annex C:	Proposals of the ad hoc meeting for agreement by correspondence in SMG10 before SMG#30
•	The revised draft LS to SMG#30 on GEA-2 in AP99-118 (revision of AP99-111) will be sent to SMG10 for agreement by correspondence.
•	The ad hoc meeting agreed to follow the proposal in AP99-115. This proposal should be endorsed by SMG10 by correspondence: To implement the explicit changes of the CR and to add a sentence which is shown in section 8.3 of the CR (3rd bullet) even if it is not shown with revision marks; to propose to SMG10 to agree that this version becomes the official version 7.1.0. Some of the changes performed in so called version 1.1.1 might be essential. If so, corresponding CRs should be produced by SMG10, to result in a version 7.2.0. The versions 7.0.0 and 7.1.0 should remain unpublished, version 7.2.0 should be published. 
•	Draft LS to T1P1, copy to SMG#30 in AP99-119 stating that SMG10 endorses stage 2 but that it has identified two risks. The LS should be approved by SMG10 by correspondence before SMG#30.
•	CR in AP99-112 to be send to SMG10 for agreement by correspondence.