CN104853328A - Digital watermark implementation method based on time stamp - Google Patents
Digital watermark implementation method based on time stamp Download PDFInfo
- Publication number
- CN104853328A CN104853328A CN201410052537.2A CN201410052537A CN104853328A CN 104853328 A CN104853328 A CN 104853328A CN 201410052537 A CN201410052537 A CN 201410052537A CN 104853328 A CN104853328 A CN 104853328A
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- China
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- short message
- service center
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- message service
- time stamp
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/12—Messaging; Mailboxes; Announcements
- H04W4/14—Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/02—Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a digital watermark implementation method based on a time stamp, and a watermark embedding process comprises the following steps: a short message service center of a service provider employs a return address (TP-RA) and user information (TP-UD) to calculate RAND of a 128bit series through HUSH operation; an authentication center employs the RAND and the Ki of a target cellphone to calculate XRES of a 32bit series through an A3 algorithm; the short message service center employs the XRES to generate digital signatures with three intensities through unidirectional mapping operation; the short message service center enables the digital signatures to serve as watermarks inserted into the time stamp (TP-SCTS) of a PDU data package; and a receiving cellphone employs recognition software to detect the watermarks, and determines whether a short message is from the service operator or not. The method can guarantees the invisibility of the watermarks to a user, does not affect the contents of the short message, and can be directly used for a conventional GSM communication system.
Description
Art
The present invention relates to a kind of digital watermarking implementation method based on timestamp, the method is used in the short message service of gsm system, increasing digital watermarking, especially a kind of method increasing sightless digital watermarking in the protocol Data Unit of GSM.
Background technology
Digital watermarking (digital watermark), refers to and embed unconspicuous mark in digitized data content.The mark be embedded into is normally invisible maybe can not be examined, but can be detected or be extracted by some calculating operations.
GSM(Global System For Mobile Communication), it is the unified standard released of European Committee for Standardization in 1992, it adopts digital communication technology, unified network standard, because GSM relative analog mobile communication technology is Generation Mobile Telecommunication System technology, so be called for short 2G.
Short message (short message service), is called for short SMS.Its word that to be user directly sent or received by mobile phone or other telecommunication terminals or digital information.
Protocol Data Unit (Protocol Data Unit), is called for short PDU, is for one of three kinds of methods sending SMS message in gsm system, and is mainly used in the transmission of Chinese short message.
At present, known gsm communication system adopts unilateral authentication, and namely network carries out authentication to mobile phone terminal, otherwise terminal does not have authentication mechanism to network.This leak causes, whackers can adopt special equipment (being called for short " pseudo-base station ") to simulate legal GSM base station, send the short message of arbitrary content to the mobile phone terminal in overlay area with arbitrary numbers, which short message the mobile phone of reception short message cannot differentiate is sent by operator, whether which is sent by pseudo-base station, also cannot distinguish transmission number and send content true.
Summary of the invention
The deficiency of certification cannot be carried out to overcome existing GSM mobile handset to the source of short message and content, the invention provides a kind of digital watermarking implementation method based on timestamp.Utilize the method, the short message service center of mobile operator, digital watermarking can be increased in the PDU of short message, and the short message with digital watermarking is sent to reception mobile phone, receive mobile phone and verify this short message by running identification software, by comparison digital watermarking, confirm that whether this short message is from carrier network.The digital watermarking that the method increases is hidden in timestamp, does not affect normal short message communication content, does not produce any impact for the mobile phone not installing identification software.
The technical solution adopted for the present invention to solve the technical problems is:
1, short message transmitting mobile phone normally sends SMS message, and after short message arrives the short message service center of operator, this short message is carried out PDU coding by short message service center, produces original PDU packet; User profile (TP-UD) in original PDU packet and return address (TP-RA) are calculated 128 bit summary sequences by HASH algorithm by short message service center; Summary sequence and target mobile phones number are given AUC (AUC) by short message service center, and AUC utilizes the key of A3 algorithm and target mobile phones (ki) to calculate 32bit signature sequence XRES, returns to short message service center; Short message service center utilizes unidirectional mapping algorithm, XRES is mapped as one 1 10 system numbers, and a scope is 2 10 system numbers of 0-59, and scope is 2 10 system numbers of 0-99, as the digital signature of this short message; Short message service center is used as watermark by this digital signature and replaces note timestamp (TP-SCTS) in original PDU packet, generates the PDU packet of band watermark.Under low-intensity pattern, replace the individual position of TP-SCTS position second with 1 10 system number; With the individual position of 2 10 system numbers replacement TP-SCTS positions second of 0-59 and ten under moderate strength; With the individual position of 2 10 system numbers replacement TP-SCTS positions second of 0-99 and ten under high strength pattern.Short message with digital watermarking is sent to reception mobile phone by short message service center.
2, on reception mobile phone, identification software is installed, receive mobile phone after receiving PDU, extract TP-UD and TP-RA wherein, utilize HASH algorithm to calculate 128 bit summary sequences, then sequence of making a summary is sent in SIM card, calculates 32bit signature sequence SRES; Identification software utilizes the mapping algorithm SRES identical with short message service center to calculate digital signature, and the digital watermarking of carrying in this digital signature and the PDU that receives is compared, if identical, then confirm that this short message is the short message from carrier network.
The invention has the beneficial effects as follows, the mobile phone of identification software has been installed, can by identifying the digital watermarking be hidden in PDU packet, judge which is the short message sent by operator, which is the illegal short message sent by pseudo-base station, effectively can reduce and send illegal short message by pseudo-base station and the counter productive produced.And the method can not destroy the structure of original short message, the mobile phone not installing identification software also normally can receive and dispatch short message.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the transmission flow figure of the short message of band watermark of the present invention.
Tu Zhong 1. AUC, 2. sends mobile phone, 3. short message service center, 4. receives mobile phone, 5. original short message, and 6. make a summary sequence, 7. target mobile phones number, 8. signature sequence, be 9. with the short message of watermark.
Embodiment
In FIG, send mobile phone (2) and send original short message (5) to short message service center (3), short message service center (2) produces original PDU, according to TP-UD and TP-RA, calculate 128bit summary sequence (6), and will make a summary and receive phone number (7) and send to AUC (1), AUC (1) calculates 32bit signature sequence (8) and sends to short message service center (3), short message service center (3) calculates digital signature, and it can be used as watermark to insert PDU, and the short message (9) of band watermark is sent to reception mobile phone (4).
Claims (1)
1. the digital watermarking implementation method based on timestamp, it is characterized in that: in gsm system, for short message service, the total return address of PDU packet (TP-RA) and user profile (TP-UD) is utilized to generate summary, the key K i of A3 algorithm and reception mobile phone is utilized to produce digital signature by this summary, and this digital signature is inserted in the timestamp (TP-SCTS) of PDU packet as watermark, receiving mobile phone uses identification software to detect this digital watermarking, confirms that whether this short message is the short message from operator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410052537.2A CN104853328A (en) | 2014-02-17 | 2014-02-17 | Digital watermark implementation method based on time stamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410052537.2A CN104853328A (en) | 2014-02-17 | 2014-02-17 | Digital watermark implementation method based on time stamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104853328A true CN104853328A (en) | 2015-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410052537.2A Pending CN104853328A (en) | 2014-02-17 | 2014-02-17 | Digital watermark implementation method based on time stamp |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106888098A (en) * | 2017-04-28 | 2017-06-23 | 宇龙计算机通信科技(深圳)有限公司 | The method and terminal of the checking communication information source true and false |
| CN107948941A (en) * | 2017-10-30 | 2018-04-20 | 中国联合网络通信集团有限公司 | A kind of method and apparatus of short message processing |
| CN108260093A (en) * | 2016-12-28 | 2018-07-06 | 中移（杭州）信息技术有限公司 | A kind of pseudo-base station prevention method and device |
| CN109587640A (en) * | 2017-09-29 | 2019-04-05 | 中国移动通信有限公司研究院 | A kind of junk information recognition methods, terminal and computer storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101079703A (en) * | 2006-05-23 | 2007-11-28 | 北京握奇数据系统有限公司 | System and method for user ID card authentication via Internet |
| CN103067892A (en) * | 2012-12-21 | 2013-04-24 | 深圳一卡通新技术有限公司 | Short message transmission method using watermark |
| US20130208889A1 (en) * | 2012-02-14 | 2013-08-15 | Yu-Chang Huang | Method for encrypting short message of mobile communication |
-
2014
- 2014-02-17 CN CN201410052537.2A patent/CN104853328A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101079703A (en) * | 2006-05-23 | 2007-11-28 | 北京握奇数据系统有限公司 | System and method for user ID card authentication via Internet |
| US20130208889A1 (en) * | 2012-02-14 | 2013-08-15 | Yu-Chang Huang | Method for encrypting short message of mobile communication |
| CN103067892A (en) * | 2012-12-21 | 2013-04-24 | 深圳一卡通新技术有限公司 | Short message transmission method using watermark |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108260093A (en) * | 2016-12-28 | 2018-07-06 | 中移（杭州）信息技术有限公司 | A kind of pseudo-base station prevention method and device |
| CN106888098A (en) * | 2017-04-28 | 2017-06-23 | 宇龙计算机通信科技(深圳)有限公司 | The method and terminal of the checking communication information source true and false |
| CN109587640A (en) * | 2017-09-29 | 2019-04-05 | 中国移动通信有限公司研究院 | A kind of junk information recognition methods, terminal and computer storage medium |
| CN107948941A (en) * | 2017-10-30 | 2018-04-20 | 中国联合网络通信集团有限公司 | A kind of method and apparatus of short message processing |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150819 |
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| WD01 | Invention patent application deemed withdrawn after publication |