- ISIM
An IP Multimedia Services Identity Module (ISIM) is an application running on a
UICC smart card in a3G mobile telephone in theIP Multimedia Subsystem (IMS). It contains parameters for identifying and authenticating the user to the IMS. The ISIM application can co-exist with SIM andUSIM on the same UICC making it possible to use the same smartcard in both GSM networks and earlier releases of UMTS.The ISIM contains a private user identity (a NAI address,
username@operator.com
), one or more public user identities (a SIP,sip:user@operator.com
, or TEL,tel:+1-212-555-12345
, address) and a long-term secret used to authenticate and calculate cipher keys.External links
* [http://www.3gpp.org/ftp/Specs/html-info/31103.htm 3GPP TS 31.103] - ISIM standard
Wikimedia Foundation. 2010.