TSG-SA WG3 (Security) meeting #4	TSGS-WG3#4(99)193
London, UK, 16-18 June 1999	

Source:	3GPP SA WG 3 (Security)

To:	3GPP TSG CN

Title:	Resources for cryptographic algorithms in the AuC

Liaison Statement

SA 3 is specifying the requirements on the cryptographic algorithms to be used in the 3G mobile system [1]. 
In order for these algorithms to fit on and/or be optimally designed for the equipment on which they are to be executed SA 3 kindly asks CN to provide characteristic values for the following AuC properties:
	X6	Word size 
	X7	Clock speed
	X8	Memory size
Those values will be used in the follwing requirement on the functions for authentication and key agreement [1, §5.1.5]:
“The functions f0—f5 shall be designed so that they can be implemented either in software or in hardware in the AuC on a X6 -bit microprocessor running at X2 MHz and with X3 kbits of memory and produce XRES, CK, IK and AUTN in less than X9 ms.”
X9 to be determined by SA2.
Reference:
	[1]	S3-99147. 3G TS 33.105 version 0.1.1. 3G Security: Cryptographic Algorithm Requirements.