TSG-T Working Group 3 (USIM) meeting #4	TSGT3#4(99)-115
Tokyo 21st – 23rd April 1999	
Agenda Item:	9
Source: 	Rapporteur for USIM interface specification (Nippon Ericsson)
Title:	Draft Work Item on USIM Interface Specifications 
Document for:	Approval	
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Work Item on USIM Interface Specifications based on GSM 11.11
1	Justification 

This work item creates specifications for USIM specific commands, file structure, content of EFs and application protocol to be used between UICC (USIM) and 3G mobile terminal. 

2	3GPP Work Area 
TSG-T 
	WG1: Conformance	
	WG2: MS capability	
X	WG3: USIM	

3	Linked work items
•	UICC and USIM functional characteristics
•	UICC electrical and mechanical interface specifications
•	UICC common interface specifications 

4	Service Aspects
Files for the USIM application are used to store information related with the services provided by 3G system.

5	MMI-Aspects
None
6	Charging Aspects
None

7	Security Aspects
When authentication and ciphering mechanisms for USIM are defined, the logical interface specifies a command to run algorithms for authentication, ciphering and integrity protection, and a response for related parameters.
8	Impacts 
 
Affects:	USIM	ME	NW	Others	
Yes	X	X			
No 					
Don't know 			X		

9	Expected Output and Timescales 
This work item is for release 1999.

Affected existing specifications	
Spec No.	CR	Subject	Approved at TSG-T	Comments	
 31.zz		USIM interface specification	December 1999	Initial draft to be approved in April 1999	

10	Work item rapporteur
Nippon Ericsson

11	Supporting companies

12	Work item leadership
3GPP TSG-T  WG3

13	Others