A subscriber identity module or subscriber identification module (SIM) is an integrated circuit that securely stores the International Mobile Subscriber Identity (IMSI) and the related key used to identify and authenticate subscribers on mobile telephony devices (such as mobile phones and computers).
A SIM is embedded into a removable SIM card, which can be transferred between different mobile devices. SIM cards were first made the same size as a credit card (85.60 mm × 53.98 mm × 0.76 mm). The development of physically smaller mobile devices prompted the development of a smaller SIM card, the mini-SIM card. Mini-SIM cards have the same thickness as full-size cards, but their length and width are reduced to 25 mm × 15 mm.
A SIM card contains its unique serial number (ICCID), international mobile subscriber identity (IMSI), security authentication and ciphering information, temporary information related to the local network, a list of the services the user has access to and two passwords: a personal identification number (PIN) for ordinary use and a personal unblocking code (PUK) for PIN unlocking.
Other articles related to "subscriber identity module, subscriber, identity":
... EAP for GSM Subscriber Identity Module (EAP-SIM) is used for authentication and session key distribution using the Subscriber Identity Module (SIM) from the Global System for Mobile ... GSM cellular networks use a subscriber identity module (SIM) card to carry out user authentication ...
... EAP for GSM Subscriber Identity Module (EAP-SIM) is used for authentication and session key distribution using the Subscriber Identity Module (SIM) from the Global System for Mobile Communications (GSM) ... GSM cellular networks use a subscriber identity module (SIM) card to carry out user authentication ...
... channels Cx (I-CSCF, S-CSCF), HSS Used to send subscriber data to the S-CSCF including Filter criteria and their priority ... Forward SIP requests which are destined to a Public Service Identity hosted by the AS Originate a session on behalf of a user or Public Service Identity, if the AS has no knowledge of a S-CSCF assigned to that user ... allow AS to activate/deactivate filter criteria stored in the HSS on a per subscriber basis Diameter Si IM-SSF, HSS Transports CAMEL subscription information ...
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