What is subscriber identity module?

A SIM card (full form Subscriber Identity Module or Subscriber Identification Module), is an integrated circuit (IC) intended to securely store the international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephony devices (such as …

What is IMSI and TMSI?

The Temporary Mobile Subscriber Identity (TMSI) is a temporary identification number that is used in the GSM network instead of the IMSI to ensure the privacy of the mobile subscriber. The TMSI prohibits tracing of the identity of a mobile subscriber by interception of the traffic on the radio link.

What is ADM in SIM card?

Administrative (ADM)—The card issuer who provides SIM to the subscriber can access only after prescribed requirements for administrative access are fulfilled.

Is IMSI and IMEI the same?

The IMSI (International Mobile Subscriber Identity) is a code used by the phone company to identify the SIM on the mobile network. The IMEI (International Mobile Station Equipment Identity) is an international “Serial number” for your phone (device itself) to properly identify it on the carriers network.

Where is IMSI stored?

Subscriber Identity Module (SIM)
The IMSI is stored in the Subscriber Identity Module (SIM) inside the phone and is sent by the phone to the appropriate network. The IMSI is used to acquire the details of the mobile in the Home Location Register (HLR) or the Visitor Location Register (VLR).

What’s the meaning of SIM?

Subscriber Identity/Identification Module
Subscriber Identity/Identification Module: a removable card inside a cell phone that stores data unique to the user, as an identification number, passwords, phone numbers, and messages.

What is TMSI in GSM identifiers?

Temporary Mobile Subscriber Identity (TMSI) This is stored on the network side only in the VLR and is not passed to the Home Location Register (HLR). Together with the current location area, the TMSI identifies a subscriber uniquely. It can contain up to 4 × 8 bits.

What is the difference between IMSI and MSISDN?

An international mobile subscriber identity (IMSI) number uniquely identifies a mobile phone subscriber and is usually stored within a SIM card. A mobile subscriber integrated services digital network (MSISDN) number is a mobile’s phone number.

Which digital forensics is related to SIM?

SIM card forensics provide valuable information about contacts, SMSs, call logs, and much more. There are commercial and open-source tools that can assist an investigator in extracting relevant evidence from SIM cards.

What is PRI and PRL?

The PRL is configuration information that a cellular phone needs to communicate on networks other than the carrier network. The PRI configures the data rates between the device and the cell tower. This ensures that the device is able to communicate with the tower at the correct rate.

What is the difference between an MSISDN and IMSI number?

How does IMSI work?

‘IMSI’ stands for ‘international mobile subscriber identity’, a number unique to your SIM card. IMSI catchers are also known as ‘Stingrays’. An ‘IMSI catcher’ is a device that locates and then tracks all mobile phones that are connected to a phone network in its vicinity, by ‘catching’ the unique IMSI number.