Method and device for identifying short messages from pseudo base stations

Patent metadata

Field	Value
Publication number	US-10045166-B2
Application number	US-201715602840-A
Country	US
Kind code	B2
Filing date	May 23, 2017
Priority date	May 24, 2016
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

The present disclosure relates to methods and devices for identifying short messages received by mobile terminals as being from pseudo base stations, wherein, the method comprises: obtaining feature information of the short message when the mobile terminal receives the short message, wherein the feature information includes content information; judging whether the short message is suspected to be an annoying short message based on the feature information; obtaining, when it is judged that the short message is suspected to be an annoying short message, an operation time of when the mobile terminal performed a cell reselection operation with a location area update, wherein the operation time is closest in time to when the mobile terminal received the short message; determining whether the short message is an annoying short message from a pseudo base station based on the operation time. In the technical feature, information security of user terminals may be enhanced.

First claim

What is claimed is:

1. A method for identifying a short message received by a mobile terminal as being from a pseudo base station, comprising:
obtaining feature information for the short message when the mobile terminal receives the short message, wherein the feature information includes at least content information;
determining whether the short message is suspected to be an undesirable short message based on the feature information;
obtaining, when it is determined that the short message is suspected to be an undesirable short message, an operation time corresponding to when the mobile terminal performed a cell site reselection operation, wherein the operation time corresponds either to the last reselection operation before the message was received or to a first reselection operation after the short message was received; and
determining whether the short message is from a pseudo base station based on the operation time,
wherein determining whether the short message is from the pseudo base station based on the operation time comprises:
determining a first time and a second time, wherein the first time corresponds to the last reselection operation when the mobile terminal last performed a cell site reselection operation with a location area update before receiving the short message, and wherein the second time corresponds to when the mobile terminal received the short message;
calculating a first time interval between the first time and the second time;
when determining that the first time interval is less than or equal to the first preset time interval, calculating a second time interval between the second time and a third time, wherein the third time corresponds to the first reselection operation when the mobile terminal performed a first cell reselection operation after receiving the short message; and
determining, when the second time interval is less than or equal to a second preset time interval, that the short message is from the pseudo base station.

2. The method of claim 1 , further comprising:
outputting prompt information when it is determined that the short message is from the pseudo base station.

3. The method of claim 1 , wherein determining whether the short message is suspected to be an undesirable short message based on the feature information comprises:
determining whether the content information includes a preset keyword; and
determining, when it is determined that the content information includes the preset keyword, that the short message is an undesirable short message as suspected.

4. The method of claim 3 , wherein the feature information further includes a communication number of a sender of the short message, and wherein determining whether the short message is suspected to be an undesirable short message based on the feature information further comprises:
determining, when the content information excludes the preset keyword, whether the communication number corresponds to a preset number;
determining, when it is determined that the communication number does not belong to the preset number, that the short message is an undesirable short message as suspected.

5. The method of claim 1 , wherein determining whether the short message is from a pseudo base station based on the operation time comprises:
determining, when the first time interval is greater than a first preset time interval, that the short message is not from the pseudo base station.

6. The method of claim 5 , wherein determining whether the short message is from a pseudo base station based on the operation time further comprises:
calculating, when the first time interval is less than or equal to the first preset time interval, a second time interval between the second time and a third time, wherein the third time corresponds to when the mobile terminal first performed a cell reselection operation after receiving the short message; and
determining, when the second time interval is greater than the second preset time interval, that the short message is not from the pseudo base station.

7. The method of claim 1 , wherein determining whether the short message is from a pseudo base station based on the operation time comprises:
calculating a third time interval between a first time and a third time, wherein the first time corresponds to when the mobile terminal last performed a cell reselection operation with a location area update before receiving the short message, and the third time corresponds to when the mobile terminal first performed a cell reselection operation with a location area update after receiving the short message;
determining, when the third time interval is less than or equal to a third preset time interval, that the short message is from the pseudo base station.

8. A device for identifying a short message received by a mobile terminal as being from a pseudo base station, comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to:
obtain feature information of a short message when a mobile terminal receives the short message, wherein the feature information includes at least content information;
determining whether the short message is suspected to be an undesirable short message based on the feature information;
obtain, when it is determining that the short message is suspected to be an undesirable short message, an operation time corresponding to when the mobile terminal performed a cell site reselection operation, wherein the operation time corresponds either to the last cell site reselection before the message was received or to a first cell site reselection after the message was received; and
determine whether the short message is from a pseudo base station based on the operation time,
wherein the processor is further configured to:
determine a first time and a second time, wherein the first time corresponds to the last cell site reselection operation when the mobile terminal last performed a cell site reselection operation with a location area update before receiving the short message, and wherein the second time corresponds to when the mobile terminal received the short message;
calculate a first time interval between the first time and the second time;
when determining that the first time interval is less than or equal to the first preset time interval, calculate a second time interval between the second time and a third time, wherein the third time corresponds to the first cell site reselection operation when the mobile terminal first performed a cell reselection operation after receiving the short message; and
determine, when the second time interval is less than or equal to a second preset time interval, that the short message is from the pseudo base station.

9. The device of claim 8 , wherein the processor is further configured to:
output prompt information when it is determined that the short message is from the pseudo base station.

10. The device of claim 8 , wherein the processor is further configured to:
determine whether the content information includes a preset keyword; and
determine, when it is determined that the content information includes the preset keyword, that the short message is an undesirable short message as suspected.

11. The device of claim 10 , wherein the feature information further includes a communication number of a sender of the short message, and wherein the processor is further configured to:
determine, when the content information excludes the preset keyword, whether the communication number corresponds to a preset number; and
determine, when it is determined that the communication number does not correspond to the preset number, that the short message

Assignees

• Beijing Xiaomi Mobile Software Co Ltd

Inventors

• Huang Qianhong
• Cui Hengbin
• Yan Laijun

Classifications

• H04W24/08

  Testing, {supervising or monitoring} using real traffic · CPC title

• H04W4/14 Primary

  Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD] · CPC title

• H04W12/12

  Detection or prevention of fraud · CPC title

• H04L63/1483

  service impersonation, e.g. phishing, pharming or web spoofing (detection of rogue wireless access points H04W12/12) · CPC title

• H04W88/08

  Access point devices · CPC title