GSM Security Quiz
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Questions and Answers

What is the purpose of using TMSI in GSM networks?

  • To compromise the security of the network
  • To add complexity to the system
  • To prevent an eavesdropper from identifying the subscriber (correct)
  • To increase the bandwidth of the channel

    • Which key is used for the authentication of subscribers in GSM networks?

  • Ki (correct)
  • IMSI
  • LAI
  • IMEI

    • What is the primary goal of GSM security design requirements?

  • To increase the error rate in the system
  • To ensure confidentiality and anonymity on the radio path (correct)
  • To compromise the security of operators
  • To add significant overhead on call setup

    • What is the role of the Key Management Scheme in GSM networks?

    <p>To provide subscriber authentication through a shared key</p> Signup and view all the answers

    What is the main purpose of using the Temporary Mobile Subscriber Identity (TMSI)?

    <p>To protect the identity of the subscriber from eavesdroppers</p> Signup and view all the answers

    What is the purpose of using the International Mobile Equipment Identity (IMEI) in GSM?

    <p>To identify the physical mobile device</p> Signup and view all the answers

    What is the primary goal of using the Subscriber Identity Module (SIM) in GSM networks?

    <p>To store keys, identifiers, and algorithms for authentication</p> Signup and view all the answers

    What is the purpose of using the Location Area Identity (LAI) in GSM architecture?

    <p>To identify the location area of the mobile station</p> Signup and view all the answers

    What is the purpose of the Central Equipment Identity Register (CEIR)?

    <p>To maintain a black list of stolen or non-type mobiles</p> Signup and view all the answers

    What is the role of the Authentication Center (AuC) in a GSM network?

    <p>Provides parameters for authentication and encryption functions</p> Signup and view all the answers

    What is the primary purpose of the A8 algorithm in GSM networks?

    <p>Generation of session key Kc</p> Signup and view all the answers

    What is the goal of the A3 algorithm in GSM mobile station authentication?

    <p>Generation of SRES response to MSC’s random challenge</p> Signup and view all the answers

    What is the primary function of the A5 encryption algorithm in GSM?

    <p>Encryption of data transmitted over the radio link</p> Signup and view all the answers

    What is the primary role of the Home Location Register (HLR) in a GSM network?

    <p>Manages subscriber location and handles call routing</p> Signup and view all the answers

    What technology is the SIM card based on?

    <p>ISO 7816 defining card size, contact layout, and electrical characteristics</p> Signup and view all the answers

    What was the significance of the attack on the A5/2 encryption algorithm?

    <p>It was cracked using a single PC within seconds</p> Signup and view all the answers

    What was the outcome of the attack on the COMP128 algorithm in SIM cards?

    <p>Extraction of COMP128 keys using side channels</p> Signup and view all the answers

    What is the primary function of the Visitor Location Register (VLR) in a GSM network?

    <p>Stores temporary subscriber information when not in the home network</p> Signup and view all the answers

    What was the outcome of the attack on the strong A5/1 algorithm in GSM networks?

    <p>Scheme breaking within two minutes of intercepted call</p> Signup and view all the answers

    What is the primary purpose of the Equipment Identity Register (EIR) in a GSM network?

    <p>Maintains a black list of stolen or non-type mobiles</p> Signup and view all the answers

    What is the primary purpose of using the Temporary Mobile Subscriber Identity (TMSI) in GSM networks?

    <p>To prevent an eavesdropper from identifying the subscriber</p> Signup and view all the answers

    What is the primary function of the Authentication Center (AuC) in a GSM network?

    <p>To authenticate the subscriber using the Subscriber Authentication Key (Ki)</p> Signup and view all the answers

    What is the primary role of the Home Location Register (HLR) in a GSM network?

    <p>To store subscriber's personal information and billing details</p> Signup and view all the answers

    What is the primary goal of GSM security design requirements?

    <p>To define security procedures for key generation and distribution</p> Signup and view all the answers

    What is the primary function of the Visitor Location Register (VLR) in a GSM network?

    <p>To assign and update Temporary Mobile Subscriber Identity (TMSI)</p> Signup and view all the answers

    What is the primary purpose of the Equipment Identity Register (EIR) in a GSM network?

    <p>To detect compromised mobile equipment</p> Signup and view all the answers

    What is the primary goal of using the Subscriber Identity Module (SIM) in GSM networks?

    <p>To authenticate the subscriber using the Subscriber Authentication Key (Ki)</p> Signup and view all the answers

    What is the primary purpose of using the International Mobile Equipment Identity (IMEI) in GSM?

    <p>To identify the physical mobile device</p> Signup and view all the answers

    What is the primary function of the Central Equipment Identity Register (CEIR) in a GSM network?

    <p>Maintaining a list of stolen or non-type mobiles</p> Signup and view all the answers

    What is the primary goal of using the Authentication Center (AuC) in a GSM network?

    <p>Providing parameters for authentication and encryption functions</p> Signup and view all the answers

    What was the outcome of the attack on the COMP128 algorithm in SIM cards?

    <p>Extraction of the K i within several hours</p> Signup and view all the answers

    What is the primary purpose of the Equipment Identity Register (EIR) in a GSM network?

    <p>Maintaining a black list of stolen or non-type mobiles</p> Signup and view all the answers

    What is the primary goal of GSM security design requirements?

    <p>Subscriber authentication and network protection</p> Signup and view all the answers

    What is the primary function of the Visitor Location Register (VLR) in a GSM network?

    <p>Stores generated triples by the HLR when a subscriber is not in his home network</p> Signup and view all the answers

    What is the primary purpose of the Home Location Register (HLR) in a GSM network?

    <p>Stores generated triples by the HLR when a subscriber is not in his home network</p> Signup and view all the answers

    What is the primary purpose of using the Temporary Mobile Subscriber Identity (TMSI) in GSM networks?

    <p>Subscriber identification during challenge-response authentication</p> Signup and view all the answers

    What is the primary function of the Authentication Scheme in GSM networks?

    <p>Subscriber identification and challenge-response authentication</p> Signup and view all the answers

    What is the primary purpose of the International Mobile Equipment Identity (IMEI) in GSM networks?

    <p>Identifying stolen or compromised equipment</p> Signup and view all the answers

    What is the primary purpose of the Subscriber Identity Module (SIM) in GSM networks?

    <p>Subscriber authentication and network protection</p> Signup and view all the answers

    What is the primary goal of the A3 algorithm in GSM mobile station authentication?

    <p>Generation of SRES response to MSC’s random challenge</p> Signup and view all the answers

    What is the primary benefit of GPRS over GSM?

    <p>Higher data rates and efficient resource utilization</p> Signup and view all the answers

    Which modulation technique is used for GPRS data transmission?

    <p>GMSK</p> Signup and view all the answers

    What type of technology is used for the duration of connection in GSM?

    <p>Circuit-Switched</p> Signup and view all the answers

    What is the billing type of connection for GPRS?

    <p>Volume based charging</p> Signup and view all the answers

    What is the primary function of the Packet Data Traffic Channel (PDTCH) in GPRS?

    <p>Transferring data between mobile station and base station</p> Signup and view all the answers

    What is the purpose of the Packet Common Control Channel (PCCCH) in GPRS?

    <p>Broadcasting system information</p> Signup and view all the answers

    What does the Packet Timing Control Channel (PTCCH) in GPRS primarily handle?

    <p>Sending bursts and timing information</p> Signup and view all the answers

    What is the primary function of the Packet Associated Control Channel (PACCH) in GPRS?

    <p>Conveying signaling information</p> Signup and view all the answers

    What is the main purpose of the Packet Random Access Channel (PRACH) in GPRS?

    <p>Uplink from MS to BS to initiate transfer</p> Signup and view all the answers

    What is the primary role of the Packet Notification Channel in GPRS?

    <p>Point-to-multipoint multicast notification</p> Signup and view all the answers

    What is the function of the Packet Broadcast Control Channel (PBCCH) in GPRS?

    <p>Broadcasting system information</p> Signup and view all the answers

    What is the primary purpose of the Packet Access Grant Channel (PAGCH) in GPRS?

    <p>Downlink for resource assignment</p> Signup and view all the answers

    What is the data rate achieved per time slot in GPRS after corrections?

    <p>14 kbps</p> Signup and view all the answers

    What is the responsibility of the GGSN in GPRS network architecture?

    <p>Interfacing with the GPRS backbone network and external packet data networks</p> Signup and view all the answers

    What is the purpose of the GPRS Tunneling Protocol (GTP) in GPRS network architecture?

    <p>Tunneling user data packets and related signaling information between GSNs</p> Signup and view all the answers

    What does the GPRS Register integrate with in GPRS network architecture?

    <p>GSM-HLR</p> Signup and view all the answers

    What does GSN stand for in GPRS network architecture?

    <p>Gateway GPRS Support Node</p> Signup and view all the answers

    What is the maximum data rate achieved by combining up to 8 time slots in GPRS?

    <p>114 kbps</p> Signup and view all the answers

    What is the primary function of the SGSN in GPRS network architecture?

    <p>Packet routing, transfer, mobility management, and authentication</p> Signup and view all the answers

    What is the role of the GGSN in GPRS network architecture?

    <p>Interfacing with the GPRS backbone network and external packet data networks</p> Signup and view all the answers

    What type of logical channel is the Packet Data Channel (PDCH) in GPRS?

    <p>Traffic channel</p> Signup and view all the answers

    What is the main purpose of GPRS session management in GPRS network architecture?

    <p>Managing procedures such as attach, detach, PDP context activation, and Quality of Service attributes</p> Signup and view all the answers

    What does the GPRS network architecture resemble when connecting with IP-based packet data networks?

    <p>An IP subnetwork</p> Signup and view all the answers

    What is the role of GPRS mobile state and location management in GPRS network architecture?

    <p>Managing three states for the mobile station: idle, ready, and standby, along with routing area updates and mobility management</p> Signup and view all the answers

    What is the primary benefit of GPRS over GSM?

    <p>Efficient use of radio bandwidth</p> Signup and view all the answers

    What is the primary role of the GPRS Tunneling Protocol (GTP) in GPRS network architecture?

    <p>Packet data transfer management</p> Signup and view all the answers

    What technology is used for the duration of connection in GSM?

    <p>Circuit-switched technology</p> Signup and view all the answers

    What is the billing type of connection for GPRS?

    <p>Volume based charging</p> Signup and view all the answers

    What is the primary function of the Packet Broadcast Control Channel (PBCCH) in GPRS?

    <p>Broadcasting system information</p> Signup and view all the answers

    What is the primary role of the Packet Notification Channel in GPRS?

    <p>Point-to-multipoint multicast notification</p> Signup and view all the answers

    What is the primary function of the Packet Access Grant Channel (PAGCH) in GPRS?

    <p>Downlink for resource assignment</p> Signup and view all the answers

    What is the primary function of the Packet Data Traffic Channel (PDTCH) in GPRS?

    <p>For data transfer</p> Signup and view all the answers

    What is the primary function of the Packet Timing Control Channel (PTCCH) in GPRS?

    <p>Uplink/Downlink Sending bursts/timing info</p> Signup and view all the answers

    What is the primary purpose of the Packet Associated Control Channel (PACCH) in GPRS?

    <p>Conveys signaling info</p> Signup and view all the answers

    What type of logical channel is the Packet Data Channel (PDCH) in GPRS?

    <p>Physical data channel</p> Signup and view all the answers

    What is the primary function of the Packet Common Control Channel (PCCCH) in GPRS?

    <p>Broadcasts system information</p> Signup and view all the answers

    What is the data rate achieved per time slot in GPRS after corrections?

    <p>14 kbps</p> Signup and view all the answers

    What is the primary responsibility of the SGSN in GPRS network architecture?

    <p>Packet routing and transfer</p> Signup and view all the answers

    What is the role of the GGSN in GPRS network architecture?

    <p>Interfacing with external packet data networks</p> Signup and view all the answers

    What is the maximum data rate achieved by combining time slots in GPRS?

    <p>114 kbps</p> Signup and view all the answers

    What is the primary function of the GPRS Tunneling Protocol (GTP)?

    <p>Tunneling user data packets and signaling information between GSNs</p> Signup and view all the answers

    What does the GPRS network architecture resemble when connecting with IP-based packet data networks?

    <p>An IP subnetwork with GGSN acting as an IP router</p> Signup and view all the answers

    What are the three states for the mobile station in GPRS mobile state and location management?

    <p>Idle, ready, and standby</p> Signup and view all the answers

    What is the primary goal of GPRS session management in GPRS network architecture?

    <p>Quality of Service attributes</p> Signup and view all the answers

    What is the primary function of the GPRS Register in GPRS network architecture?

    <p>Maintaining GPRS subscriber data and routing information</p> Signup and view all the answers

    What technology does GPRS support when interconnecting with IP-based packet data networks?

    <p>Both IPv4 and IPv6</p> Signup and view all the answers

    What is the primary responsibility of GSNs in GPRS network architecture?

    <p>Tunneling user data packets and signaling information between GSNs</p> Signup and view all the answers

    What is the primary function of the Packet Data Channel (PDCH) in GPRS?

    <p>Physical channel for GPRS traffic, allocated based on current traffic load and service priority</p> Signup and view all the answers

    What is the primary benefit of GPRS over GSM?

    <p>Volume-based charging</p> Signup and view all the answers

    What is the data rate achieved per time slot in GPRS after corrections?

    <p>14.4 Kbps</p> Signup and view all the answers

    What is the primary function of the SGSN in GPRS network architecture?

    <p>Location management of mobile stations</p> Signup and view all the answers

    Which modulation technique is used for GPRS data transmission?

    <p>GMSK</p> Signup and view all the answers

    What is the maximum data rate achieved by combining up to 8 time slots in GPRS?

    <p>115 kbps</p> Signup and view all the answers

    What is the role of the GGSN in GPRS network architecture?

    <p>Serving as the interface between the GPRS network and external packet data networks</p> Signup and view all the answers

    What is the primary function of the Packet Associated Control Channel (PACCH) in GPRS?

    <p>Conveying signaling information</p> Signup and view all the answers

    What is the primary purpose of using the International Mobile Equipment Identity (IMEI) in GSM networks?

    <p>Uniquely identifying mobile equipment</p> Signup and view all the answers

    What is the primary role of the Packet Notification Channel in GPRS?

    <p>Point-to-multipoint multicast notification</p> Signup and view all the answers

    What was the outcome of the attack on the A5/2 encryption algorithm in GSM networks?

    <p>It was found to be vulnerable and not suitable for secure communication</p> Signup and view all the answers

    What technology is the SIM card based on?

    <p>GSM</p> Signup and view all the answers

    What is the primary function of the Authentication Scheme in GSM networks?

    <p>Verifying the identity of the subscriber</p> Signup and view all the answers

    What is the maximum data rate achieved by combining time slots in GPRS?

    <p>114 kbps</p> Signup and view all the answers

    What is the primary function of the GGSN in GPRS network architecture?

    <p>Interfacing with external packet data networks</p> Signup and view all the answers

    What is the primary role of the SGSN in GPRS network architecture?

    <p>Packet routing and transfer</p> Signup and view all the answers

    What is the primary function of the GPRS Tunneling Protocol (GTP) in GPRS network architecture?

    <p>Tunneling user data packets and related signaling information between GSNs</p> Signup and view all the answers

    What is the primary purpose of GPRS session management?

    <p>Procedures such as attach, detach, and PDP context activation</p> Signup and view all the answers

    What are the three states for the mobile station in GPRS mobile state and location management?

    <p>Idle, ready, standby</p> Signup and view all the answers

    What is the data rate achieved per time slot in GPRS after corrections?

    <p>14 kbps</p> Signup and view all the answers

    What type of backbone networks are GSNs connected through in GPRS network architecture?

    <p>IP-based networks</p> Signup and view all the answers

    What does the GPRS Register integrate with in GPRS network architecture?

    <p>GSM-HLR</p> Signup and view all the answers

    What technology is used for the duration of connection in GPRS?

    <p>Packet-switching</p> Signup and view all the answers

    What does the Packet Data Channel (PDCH) in GPRS primarily handle?

    <p>Physical channel for GPRS traffic</p> Signup and view all the answers

    What type of data networks can GPRS interconnect with?

    <p>Both IPv4 and IPv6 networks</p> Signup and view all the answers

    Study Notes

    GPRS Network Architecture and Operation

    • GPRS operates on a 200 kHz wide radio channel and carries a digital data stream of 271 kbps, divided into 8 time slots each carrying 34 kbps per slot.
    • The data rate achieved after corrections is 14 kbps per time slot, and GPRS can combine up to 8 time slots for a data rate of 114 kbps.
    • GPRS network architecture includes GSNs, with SGSN (Serving GPRS Support Node) and GGSN (Gateway GPRS Support Node) being key elements.
    • SGSN is responsible for delivering data packets to mobile stations, packet routing, transfer, mobility management, and authentication.
    • GGSN interfaces the GPRS backbone network and external packet data networks, converting GPRS packets from SGSN to the PDP format and performing authentication.
    • GPRS Register is integrated with GSM-HLR, maintaining GPRS subscriber data and routing information, and storing the current SGSN address.
    • GSNs are connected through IP-based backbone networks, including intra-PLMN and inter-PLMN networks, requiring roaming agreements.
    • GPRS Tunneling Protocol (GTP) is used to tunnel user data packets and related signaling information between GSNs.
    • GPRS can interconnect with IP-based packet data networks, supporting both IPv4 and IPv6, and resembling an IP subnetwork with GGSN acting as an IP router.
    • GPRS session management involves procedures such as attach, detach, PDP context activation, and Quality of Service attributes.
    • GPRS mobile state and location management includes three states for the mobile station: idle, ready, and standby, along with routing area updates and mobility management.
    • GPRS logical channels include the Packet Data Channel (PDCH), which is a physical channel for GPRS traffic, allocated based on current traffic load and service priority.

    GPRS Network Architecture and Operation

    • GPRS operates on a 200 kHz wide radio channel and carries a digital data stream of 271 kbps, divided into 8 time slots each carrying 34 kbps per slot.
    • The data rate achieved after corrections is 14 kbps per time slot, and GPRS can combine up to 8 time slots for a data rate of 114 kbps.
    • GPRS network architecture includes GSNs, with SGSN (Serving GPRS Support Node) and GGSN (Gateway GPRS Support Node) being key elements.
    • SGSN is responsible for delivering data packets to mobile stations, packet routing, transfer, mobility management, and authentication.
    • GGSN interfaces the GPRS backbone network and external packet data networks, converting GPRS packets from SGSN to the PDP format and performing authentication.
    • GPRS Register is integrated with GSM-HLR, maintaining GPRS subscriber data and routing information, and storing the current SGSN address.
    • GSNs are connected through IP-based backbone networks, including intra-PLMN and inter-PLMN networks, requiring roaming agreements.
    • GPRS Tunneling Protocol (GTP) is used to tunnel user data packets and related signaling information between GSNs.
    • GPRS can interconnect with IP-based packet data networks, supporting both IPv4 and IPv6, and resembling an IP subnetwork with GGSN acting as an IP router.
    • GPRS session management involves procedures such as attach, detach, PDP context activation, and Quality of Service attributes.
    • GPRS mobile state and location management includes three states for the mobile station: idle, ready, and standby, along with routing area updates and mobility management.
    • GPRS logical channels include the Packet Data Channel (PDCH), which is a physical channel for GPRS traffic, allocated based on current traffic load and service priority.

    GPRS Network Architecture and Operation

    • GPRS operates on a 200 kHz wide radio channel and carries a digital data stream of 271 kbps, divided into 8 time slots each carrying 34 kbps per slot.
    • The data rate achieved after corrections is 14 kbps per time slot, and GPRS can combine up to 8 time slots for a data rate of 114 kbps.
    • GPRS network architecture includes GSNs, with SGSN (Serving GPRS Support Node) and GGSN (Gateway GPRS Support Node) being key elements.
    • SGSN is responsible for delivering data packets to mobile stations, packet routing, transfer, mobility management, and authentication.
    • GGSN interfaces the GPRS backbone network and external packet data networks, converting GPRS packets from SGSN to the PDP format and performing authentication.
    • GPRS Register is integrated with GSM-HLR, maintaining GPRS subscriber data and routing information, and storing the current SGSN address.
    • GSNs are connected through IP-based backbone networks, including intra-PLMN and inter-PLMN networks, requiring roaming agreements.
    • GPRS Tunneling Protocol (GTP) is used to tunnel user data packets and related signaling information between GSNs.
    • GPRS can interconnect with IP-based packet data networks, supporting both IPv4 and IPv6, and resembling an IP subnetwork with GGSN acting as an IP router.
    • GPRS session management involves procedures such as attach, detach, PDP context activation, and Quality of Service attributes.
    • GPRS mobile state and location management includes three states for the mobile station: idle, ready, and standby, along with routing area updates and mobility management.
    • GPRS logical channels include the Packet Data Channel (PDCH), which is a physical channel for GPRS traffic, allocated based on current traffic load and service priority.

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    Description

    Test your knowledge of GSM security concerns, goals, and measures with this quiz designed for students of Kuwait University's Computer Engineering Department CpE 451 course on Wireless and Mobile Networking. Challenge your understanding of protecting customer privacy, avoiding fraud, ensuring anonymity, and achieving confidentiality in mobile communication networks.

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