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GSM Security Quiz
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GSM Security Quiz

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@TidyLight7628

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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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