# US 10,482,274 B2 · Terminal device and method for protecting terminal device, and terminal management server > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,482,274 B2 - Document ID: US10482274B2 - Status: Granted - Kind: B2 - Application number: 15/005,763 - Filed: 2016-01-25 - Published: 2016-05-19 - Granted: 2019-11-19 - Earliest claimed: 2013-08-29 - Assignees: SK Telecom Co., Ltd. - Applicants: SK Telecom Co., Ltd. - Inventors: Eungsuk Lee - Web page: https://patentgrep.com/patent/US10482274B2 ## CPC - G06F 21/60: Protecting data - G06F 9/44: Arrangements for executing specific programs - G06F 9/4416: {Network booting; Remote initial program loading [RIPL]} - G06F 11/30: Monitoring - G06F 15/16: Combinations of two or more digital computers each having at least an arithmetic unit, a program unit and a register, e.g. for a simultaneous processing of several programs {(coordinating program control therefor G06F9/52; in regulating and control system G05B)} - G06F 21/604: {Tools and structures for managing or administering access control systems} - G06F 21/6218: {to a system of files or objects, e.g. local or distributed file system or database} - H04L 63/083: {using passwords (cryptographic mechanisms or cryptographic arrangements for entity authentication using a predetermined code H04L9/3226)} - H04L 63/0853: {using an additional device, e.g. smartcard, SIM or a different communication terminal (cryptographic mechanisms or cryptographic arrangements for entity authentication involving additional secure or trusted devices H04L9/3234)} - H04W 12/08: Access security - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A terminal device includes: a condition checking unit to monitor an operation state of the terminal device by executing a terminal managing program, and determine whether the terminal device is in a state of a preset condition for terminal protection; a communication control unit to control the communication unit to be connected to the terminal management server using the location information when the condition checking unit determines that the terminal device is in a state of the condition for terminal protection, and control the communication unit to send the identification information to the terminal management server; and a lock control unit configured to lock the terminal device by executing the terminal managing program when a lock command is issued by, and received from, the terminal management server. ## Claims ### Claim 1 A terminal device comprising: a communication unit configured to communicate with a terminal management server; a memory unit configured to store unique identification information, location information to be used in accessing the terminal management server; and a terminal managing program for locking the terminal device; a condition checking unit configured to monitor an operation state of the terminal device by executing the terminal managing program, and determine whether the terminal device is in a state of a preset condition for terminal protection, the preset condition including subscriber identity module (SIM) separated away from the terminal device; a communication control unit configured to, when the condition checking unit determines that the terminal device is in a state of the preset condition for terminal protection, control the communication unit to access the terminal management server through an access point in a wireless communication channel other than a mobile communication network, and control the communication unit to send, through the access point in the wireless communication channel other than the mobile communication network, the identification information to the terminal management server; and a lock control unit configured to lock the terminal device by executing the terminal managing program when a lock command is issued by, and received, through the access point in the wireless communication channel other than the mobile communication network, from, the terminal management server. ### Claim 2 (depends on 1) The terminal device of claim 1, wherein the condition checking unit is configured to determine that the terminal device is in a state of the preset condition for terminal protection when the preset condition occurs while the terminal device is operated. ### Claim 3 (depends on 1) The terminal device of claim 1, wherein the communication control unit is configured to monitor a communication channel of the communication unit when the terminal device is determined to be in a state of the preset condition for terminal protection, and control the communication unit to be connected to the terminal management server through the communication channel when the communication channel is connected. ### Claim 4 (depends on 1) The terminal device of claim 1, wherein the identification information, the location information and the terminal managing program are stored in a non-volatile data storage area, which is not reset even by initialization, of storage areas of the memory unit. ### Claim 5 A method of protecting a terminal device comprising one or more processors, the method executed by the one or more processors, the method comprising: monitoring, by the terminal device, an operation state of the terminal device to determine whether the terminal device is in a state of a preset condition for terminal protection, the preset condition including subscriber identity module (SIM) separated away from the terminal device; accessing, by the terminal device, a terminal management server through an access point in a wireless communication channel other than a mobile communication network, when the terminal device is in a state of the preset condition for terminal protection; sending, by the terminal device through the access point in the wireless communication channel other than the mobile communication network, identification information of the terminal device to the accessed terminal management server; locking, by the terminal device, the terminal device when a lock command is issued by, and received, through the access point in the wireless communication channel other than the mobile communication network, from, the terminal management server. ### Claim 6 (depends on 5) The method of claim 5, wherein in said determining whether the terminal device is in a state of the preset condition for terminal protection, the terminal device is determined to be in a state of the preset condition for terminal protection when the preset condition occurs. ### Claim 7 (depends on 5) The method of claim 5, wherein said accessing the terminal management server comprises: monitoring a communication channel when the terminal device is in a state of the preset condition for terminal protection; and accessing the terminal management server through the communication channel using the preset location information when the communication channel is connected. ### Claim 8 (depends on 5) The method of claim 5, wherein the identification information, the location information and the terminal managing program are stored in a non-volatile data storage area, which is not reset even when the terminal device is initialized. ### Claim 9 A non-transitory computer-readable storage medium storing a terminal managing program to perform a method of protecting a terminal device comprising one or more processors, the method performed by the one or more processors, the method comprising: monitoring, by the terminal device, an operation state of the terminal device to determine whether the terminal device is in a state of a preset condition for terminal protection, the preset condition including subscriber identity module (SIM) separated away from the terminal device; accessing, by the terminal device, a terminal management server through an access point in a wireless communication channel other than a mobile communication network, when the terminal device is in a state of the preset condition for terminal protection; sending, by the terminal device through the access point in the wireless communication channel other than the mobile communication network, identification information of the terminal device to the accessed terminal management server; and locking, by the terminal device, the terminal device when a lock command is issued by, and received, through the access point in the wireless communication channel other than the mobile communication network, from, the terminal management server. ### Claim 10 (depends on 9) The non-transitory computer-readable storage medium of claim 9, wherein in said determining whether the terminal device is in a state of the preset condition for terminal protection, the terminal device is determined to be in a state of the preset condition for terminal protection when the preset condition for the terminal device occurs. ### Claim 11 (depends on 9) The non-transitory computer-readable storage medium of claim 9, wherein said accessing the terminal management server comprises: monitoring a communication channel when the terminal device is in a state of the preset condition for terminal protection; and accessing the terminal management server through the communication channel using preset location information when the communication channel is connected. ### Claim 12 (depends on 9) The non-transitory computer-readable storage medium of claim 9, wherein the identification information, the location information and the terminal managing program are stored in a non-volatile data storage area which is not reset even when the terminal device is initialized.