CN101242453B - A transmission method and system for dual-audio multi-frequency signal - Google Patents
A transmission method and system for dual-audio multi-frequency signal Download PDFInfo
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- CN101242453B CN101242453B CN2007100637556A CN200710063755A CN101242453B CN 101242453 B CN101242453 B CN 101242453B CN 2007100637556 A CN2007100637556 A CN 2007100637556A CN 200710063755 A CN200710063755 A CN 200710063755A CN 101242453 B CN101242453 B CN 101242453B
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Abstract
The invention discloses a method and a system for transmitting DTMF signals. The method comprises the steps that: the user terminal and a service terminal synchronize DTMF signal encryption rules; the DTMF signals of the user terminal are converted to encrypted rules according to the DTMF signal encryption rules, and sent to the service terminal; and the service terminal receives the encrypted DTMF signals, and decrypts the encrypted DTMF signals according to the DTMF signals.
Description
Technical field
The present invention relates to touch-tone signal, particularly a kind of transmission method of touch-tone signal and system.
Background technology
In Interactive Voice Response (IVR) system applies such as voice mail and automated banking service, the user needs the keyboard input user profile by telephone terminal usually when access system critical data data, as number of the account and encrypted message, these user profile are used the transmission of dual-tone multifrequency (DTMF, Dual Tone MultipleFrequency) aspect usually.Because dtmf signal only is the voice signal carrier wave of a particular frequencies, in the process of transmission, do not encrypt, so the listener-in can reduce the fail safe of system applies by at the enterprising key messages such as the account number that sounds obtaining the user and password of committing theft of telephone line or wireless telephonic voice channel.
U. S. application number is 20020076039 invention, " Method and apparatus for securingtelephone passwords ", the device that discloses a kind of special use adds the processing of making an uproar to dtmf signal, and the cooperation by user terminal and back-end system realizes the encryption to dtmf signal.But this processing method needs higher hardware cost, and needs the end-to-end transmission of the cooperation of carrier network with solution encryption back dtmf signal; Encryption method is cured in the task equipment simultaneously, to its very difficulty of upgrading.
Summary of the invention
The technical problem that the present invention will solve provides a kind of transmission method of dtmf signal, and this method can improve the dtmf signal safety of transmission.
The transmission method of dtmf signal provided by the invention comprises step:
A, the synchronous dtmf signal encryption rule of user terminal and service end;
B is converted to the encryption dtmf signal according to described dtmf signal encryption rule with the dtmf signal of described user terminal, and sends to described service end;
C, described service end receives encrypts dtmf signal, and according to described dtmf signal encryption rule described encryption dtmf signal is decrypted.
Further, described steps A comprises step:
Described service end generates described encryption rule;
Described user terminal is downloaded described encryption rule from described service end.
Perhaps, steps A comprises step:
Described user terminal generates described encryption rule;
Described user terminal uploads to described service end with described encryption rule.
Encryption rule can comprise cryptographic algorithm and/or decipherment algorithm, and comprises that further encrypting switch identifies, and described step B comprises:
User terminal judges whether encrypt the switch sign opens, if open, then be converted to the encryption dtmf signal and send to described service end according to the dtmf signal of described dtmf signal encryption rule with described user terminal, otherwise, the dtmf signal of user terminal is not encrypted conversion directly sends to described service end;
Described step C comprises:
Described service end receives dtmf signal, judges whether the encryption switch sign in the encryption rule opens, if open, then and according to described dtmf signal encryption rule described encryption dtmf signal is decrypted, otherwise, described dtmf signal is not decrypted operation.
Further, encryption rule may further include the term of validity, and described steps A comprises:
User terminal or service end are judged the term of validity of encryption rule, if term of validity inefficacy, then synchronous crypto-operation rule again.
Encryption rule can comprise encrypts out of order table, and described step B comprises step:
According to the out of order table of encryption in the described dtmf signal encryption rule dtmf signal of described user terminal is mapped as the corresponding dtmf signal of encrypting in the out of order table, and sends to described service end;
Described step C comprises step:
Described service end receives encrypts dtmf signal, and according to the out of order table of encryption in the described dtmf signal encryption rule described encryption dtmf signal is decrypted.
Perhaps encryption rule comprises the cryptographic algorithm of cipher feedback type, and described step B comprises step:
Utilize the initial encryption vector that the dtmf signal of user's input is encrypted;
Carry out converting dtmf signal output to after the Hash operation to encrypting output, and send to service end.
The transmission method of dtmf signal provided by the invention, user terminal and service end synchronous crypto-operation rule, at user terminal dtmf signal is encrypted, be converted to new dtmf signal and send to service end, and service end is decrypted the dtmf signal of receiving according to encryption rule.By above-mentioned processing, improved the dtmf signal safety of transmission.Further, because upgrading of being convenient to encrypt and maintenance are mainly carried out in encryption and decryption at user terminal and service end.
Transmission method by dtmf signal of the present invention, after encrypting, be converted to new dtmf signal in client, can directly send to service end by telephone network or other transmission channels, service end is reduced to the initial user input signal according to synchronous encryption rule with the signal that receives, and improves the fail safe of dtmf signal.Can also be used in combination with some other single channel encryption method, further improve the dtmf signal safety of transmission.
Another technical problem that the present invention will solve provides a kind of transmission system of dtmf signal, and this system can improve the dtmf signal safety of transmission.
The transmission system of dtmf signal provided by the invention comprises user terminal and service end, wherein:
User terminal is used to preserve encryption rule, receives the also dtmf signal of monitor user ' input, and the dtmf signal of input is converted to new dtmf signal according to encryption rule, sends to service end then;
Service end is used to preserve encryption rule, receives the dtmf signal from the user terminal end, according to encryption rule the dtmf signal of receiving is decrypted.
Further,
Described service end also is used for producing and safeguarding encryption rule;
Described user terminal also is used for from service end by network download encryption rule and preservation.
Further, described user terminal can comprise encryption rule memory cell, dtmf signal detecting unit and dtmf signal ciphering unit; Wherein,
The encryption rule memory cell is used to store dtmf signal and encrypts required encryption rule, and encryption rule comprises information such as cryptographic algorithm and encryption key;
The dtmf signal detecting unit is used to detect whether user's input is dtmf signal, if then dtmf signal is sent to the dtmf signal ciphering unit.
The dtmf signal ciphering unit is used to receive the dtmf signal that the dtmf signal detecting unit sends, and according to the encryption rule of encryption rule cell stores, dtmf signal is encrypted, and the dtmf signal after will encrypting sends to service end.
Further, described user terminal also comprises the encryption rule acquiring unit, is used for obtaining encryption rule from service end, and encryption rule is stored in the encryption rule memory cell.
Further, described user terminal can also comprise that encryption rule upgrades detecting unit, is used for and serve end communication and detect and whether need to carry out the DTMF encryption rule and upgrade, if then obtain message to encryption rule acquiring unit transmission encryption rule;
Described encryption rule acquiring unit after being used to receive described encryption rule and obtaining message, obtains encryption rule from service end, and upgrades the encryption rule of storing in the encryption rule memory cell.
And described encryption rule can also comprise that encrypting unlatching indicates; Encrypting and open sign can be the special discernible telephone signal of client, such as special dtmf signal string, and control signaling, the digital coding message of specific format.
Described dtmf signal ciphering unit is used for judging the encryption of encryption rule opens to indicate whether be in opening, if, then the dtmf signal of receiving is encrypted, otherwise, dtmf signal is not encrypted.
And further, described user terminal comprises encrypting enables control unit, is used to detect the signaling feedback of service end, when the service end signaling of signaling feedback and the encryption unlatching of setting is identical, encrypt the unlatching sign and be set to opening, otherwise be set to closed condition.
Service end can comprise encryption rule memory cell, dtmf signal detecting unit and dtmf signal decrypting device;
The encryption rule memory cell is used to store the required encryption rule of dtmf signal deciphering.
The dtmf signal detecting unit is used to detect whether the signal of receiving is dtmf signal, if then dtmf signal is sent to the dtmf signal decrypting device.
The dtmf signal decrypting device is used to receive the dtmf signal that the dtmf signal detecting unit sends, and according to the encryption rule of encryption rule cell stores, dtmf signal is decrypted.
Further, service end also comprises the encryption rule generation unit, is used to produce encryption rule, and is stored in the encryption rule memory cell.
Further, server device also comprises encryption rule update notification unit, is used for and the user terminal communication, and whether informing user terminal needs to upgrade encryption rule.
And encryption rule can comprise that encrypting unlatching indicates;
Described dtmf signal decrypting device judges the encryption in the encryption rule opens to indicate whether be in opening when receiving dtmf signal, if, then dtmf signal is decrypted, otherwise, do not need dtmf signal is decrypted.
Further, service end comprises encrypting enables notification unit, is used for sending the signaling of opening or closing encryption unlatching sign to user terminal.
The transmission system of dtmf signal provided by the invention, user terminal and service end are stored corresponding encryption rule respectively, at user terminal dtmf signal is encrypted, be converted to new dtmf signal and send to service end, and service end is decrypted the dtmf signal of receiving according to encryption rule.By above-mentioned processing, improved the dtmf signal safety of transmission.Further, because upgrading of being convenient to encrypt and maintenance are mainly carried out in encryption and decryption at user terminal and service end.Dtmf signal transmission system provided by the invention can also adopt some single channel encryption methods by dtmf signal in telephone network or data network, further improve the dtmf signal safety of transmission.
Description of drawings
Figure 1 shows that the transmission method flow chart of dtmf signal of the present invention;
Figure 2 shows that a kind of out of order table of encryption that is used for the dtmf signal encryption of transmission method of the present invention;
Figure 3 shows that the schematic diagram that a kind of dtmf signal encryption of transmission method of the present invention realizes;
Figure 4 shows that the structural representation of a user terminal embodiment in the transmission system of the present invention;
Figure 5 shows that the structural representation of a service end embodiment in the transmission system of the present invention.
Embodiment
Describe the preferred embodiments of the present invention in detail below in conjunction with accompanying drawing.
Referring to Fig. 1, the transmission method of dtmf signal of the present invention comprises the steps:
As a rule, encryption rule comprises the encryption related information of dtmf signal and the deciphering relevant information of dtmf signal.Encrypt in the application at one, a common end utilizes the encryption related information in the encryption rule that data are encrypted, and the other end utilizes the deciphering relevant information in the encryption rule that data are decrypted.In order to realize correct encryption and decryption process, encryption related information and deciphering relevant information must keep corresponding relation, and user terminal and service end guarantee that by synchronizing process the dtmf signal encryption rule keeps synchronous regime.Encryption rule can be responsible for generating or safeguarding that user terminal is downloaded encryption rule by voice channel or data channel from service end by service end.Encryption rule also can be generated by user terminal, and uploads to service end by voice channel or data channel and store.In order to guarantee the fail safe of information in the synchronizing process, can encrypt the information of exchange.
The term of validity that can comprise this encryption rule in the encryption rule, user terminal or service end judge at first before communication whether the term of validity of encryption rule is effective, if inefficacy, then synchronous crypto-operation rule again.
Service end can be safeguarded different encryption rules for different user terminals, and distinguishes by user terminal identification; Equally, user terminal also can be safeguarded the encryption rule of a plurality of service ends, and distinguishes by the service end sign.User terminal identification can be the telephone number of user terminal or device identification etc.; The service end sign can be telephone number or the IP address or the device identification etc. of service end.
Step 102 is converted to the encryption dtmf signal according to the dtmf signal encryption rule with the dtmf signal of user terminal, and sends to service end
At user terminal end monitoring dtmf signal, when finding the dtmf signal input,,, dtmf signal is encrypted as encryption key according to cryptographic algorithm in the dtmf signal encryption rule and relevant information.The cryptographic algorithm of realization dtmf signal of the present invention has multiple, and the common ground of these algorithms is that dtmf signal still shows as dtmf signal through after encrypting.To provide during the back is described and encrypt the several concrete example that realizes.
After service end receives and encrypts dtmf signal,,, be decrypted, thereby obtain the dtmf signal of original input encrypting dtmf signal as decruption key according to decipherment algorithm in the encryption rule and relevant information.
In some applications, service end can be pointed out the user to import some selective informations and select follow-up handling process.Respond these promptings and the dtmf signal imported for the user, can not encrypt.
Open sign in order to realize that the part dtmf signal is encrypted and the part dtmf signal is not encrypted, can in encryption rule, to comprise encrypting.User terminal keeps encrypting the consistent of unlatching sign with service end.User terminal at first judges whether that according to encrypt opening sign needs encrypt dtmf signal when monitoring dtmf signal, open sign and be in opening if encrypt, then this dtmf signal is encrypted, otherwise, do not encrypt.Corresponding, service end is opened sign according to the encryption in the encryption rule and is judged whether dtmf signal is decrypted after receiving dtmf signal, is in opening if encrypt the unlatching sign, then this dtmf signal is decrypted, otherwise, be not decrypted.
Encrypting the open and close of opening sign can be controlled by service end.Generally, the application program of service end can determine whether the dtmf signal that requires to import is critical data, if then encrypt the unlatching sign and be set to opening, otherwise it is set to closed condition.If the user can determine whether to need to open to encrypt to open sign, also can encrypt the control of the open and close of opening sign by user terminal.
Introduce several encryption methods below to dtmf signal.
A kind of encryption method is that each dtmf signal is mapped as another dtmf signal uniquely, mapping relations between the signal represent that by encrypting out of order table an object lesson of encrypting out of order table can be referring to Fig. 2 (not shown dtmf signal can be mapped as self).At this moment, encryption rule comprises the out of order table of similar encryption shown in Figure 2.User terminal is mapped as new dtmf signal according to encrypting out of order table with dtmf signal, and service end is carried out inverse mapping according to encrypting out of order table, is reduced to initial dtmf signal.
As shown in Figure 3, another dtmf signal encryption method adopts the mode of stream cipher to carry out.The dtmf signal and the initial encryption vector of user's input enter ciphering unit, after the ciphering unit encryption is finished, Hash operation are carried out in output, convert output to dtmf signal output.Ciphering process can be reduced to following formula:
Output＝Hash(CFB(Input))
Wherein, CFB is meant the cryptographic algorithm of cipher feedback type (Cipher Feedback Mode), A5 for example, RC4, DES, 3DES, AES etc.This encryption method has the less advantage of transport overhead.
Another cryptographic algorithm is, returns the encryption crossfire in real time by service end system in communication process, and this encrypts crossfire and can transmit or data channel be transmitted to the voice channel of user side by service end; When service end returned the encryption code stream in real time, user terminal calculated also reduction and encrypts code stream, and when finding that content code stream is lost, user terminal will ask service end to retransmit.The encryption code stream generating algorithm of this moment is determined that by service end user terminal need not the computing cryptographic algorithm.The computing capability that this encryption method needs is less.
At this moment, ciphering process can be reduced to following formula:
Output＝Hash(Input?xor?CiperStream))
Wherein, CiperStream is that service end system returns the encryption crossfire in real time.User's input and encryption crossfire directly carry out cryptographic calculation, and cryptographic calculation can be simple XOR.
The transmission method of dtmf signal provided by the invention, user terminal and service end synchronous crypto-operation rule, at user terminal dtmf signal is encrypted, be converted to new dtmf signal and send to service end, and service end is decrypted the dtmf signal of receiving according to encryption rule.By above-mentioned processing, improved the dtmf signal safety of transmission.Further, encryption and decryption are mainly carried out at user terminal and service end, are convenient to the upgrading and the maintenance of encryption method.And can be according to the situations such as computing capability of user terminal and service end, the choose reasonable cryptographic algorithm has improved the flexibility that realizes.
The transmission system of a kind of dtmf signal provided by the invention comprises user terminal and service end.
Wherein, user terminal is used to preserve encryption rule, receives user's input, monitors the dtmf signal of input, and the dtmf signal of input is converted to new dtmf signal according to encryption rule, sends to service end then;
Service end is used to preserve encryption rule, receives the dtmf signal from the user terminal end, according to encryption rule the dtmf signal of receiving is decrypted.
Further, service end can be used for producing and safeguarding that encryption rule, user terminal also are used for downloading encryption rule by network from service end, thereby keeps the encryption rule of user terminal and service end to keep synchronously.
Encryption rule also can be produced by user terminal, uploads to service end by network then, is preserved by service end.
As shown in Figure 4, a kind of user terminal provided by the invention comprises encryption rule memory cell, dtmf signal detecting unit and dtmf signal ciphering unit.
Wherein, the encryption rule memory cell is used to store dtmf signal and encrypts required encryption rule, and encryption rule comprises information such as cryptographic algorithm and encryption key.
The dtmf signal detecting unit is used to detect whether user's input is dtmf signal, if then dtmf signal is sent to the dtmf signal ciphering unit.(please replenish the specific implementation of detection)
The dtmf signal ciphering unit is used to receive the dtmf signal that the dtmf signal detecting unit sends, and according to the encryption rule of encryption rule cell stores, dtmf signal is encrypted, and the dtmf signal after will encrypting sends to service end.
User terminal can also comprise the encryption rule acquiring unit, and the encryption rule acquiring unit is used for obtaining encryption rule from service end, and encryption rule is stored in the encryption rule memory cell.
Further, user terminal can also comprise that encryption rule upgrades detecting unit, encryption rule upgrades detecting unit and is used for and serves end communication, whether needing to carry out the DTMF encryption rule with detection upgrades, if, then notify the encryption rule acquiring unit, obtain encryption rule from service end, and upgrade the encryption rule of storing in the encryption rule memory cell by the encryption rule acquiring unit.
Encryption rule can also comprise encrypt to open sign, and this sign is used to show that the dtmf signal that whether needs current input encrypts.In this case, the dtmf signal ciphering unit judges at first the encryption in the encryption rule opens to indicate whether be in opening when receiving dtmf signal, if, then dtmf signal is encrypted, otherwise, dtmf signal is not encrypted.And user terminal can comprise encrypting and enables control unit, the signaling feedback that control unit is used to detect service end is enabled in encryption, when the service end signaling of opening in signaling feedback and the encryption of setting is identical, encrypts unlatching and indicate and be set to opening, otherwise be set to closed condition.
As shown in Figure 5, a kind of server device provided by the invention comprises encryption rule memory cell, dtmf signal detecting unit and dtmf signal decrypting device.
Wherein, the encryption rule memory cell is used to store the required encryption rule of dtmf signal encryption.
The dtmf signal detecting unit is used to detect whether the signal of receiving is dtmf signal, if then dtmf signal is sent to the dtmf signal ciphering unit.
The dtmf signal decrypting device is used to receive the dtmf signal that the dtmf signal detecting unit sends, and according to the encryption rule of encryption rule cell stores, dtmf signal is decrypted.
Server device can also comprise the encryption rule generation unit, and the encryption rule generation unit is used to produce encryption rule, and encryption rule is stored in the encryption rule memory cell.
Further, server device can also comprise encryption rule update notification unit, and encryption rule update notification unit is used for and the user terminal communication, and whether informing user terminal needs to upgrade encryption rule.
Encryption rule can also comprise encrypting opens sign, and this sign is used to show that the dtmf signal that whether needs current is decrypted.In this case, the dtmf signal decrypting device judges at first the encryption in the encryption rule opens to indicate whether be in opening when receiving dtmf signal, if, then dtmf signal is decrypted, otherwise, do not need dtmf signal is decrypted.And server device can comprise encrypting and enables notification unit, encrypts to enable notification unit and be used for sending to open or close to user terminal encrypting the signaling of opening sign.
The transmission system of dtmf signal provided by the invention, user terminal and service end are stored corresponding encryption rule respectively, at user terminal dtmf signal is encrypted, be converted to new dtmf signal and send to service end, and service end is decrypted the dtmf signal of receiving according to encryption rule.By above-mentioned processing, improved the dtmf signal safety of transmission.Further, because upgrading of being convenient to encrypt and maintenance are mainly carried out in encryption and decryption at user terminal and service end.
Dtmf signal transmission system of the present invention can also adopt some single channel encryption methods by dtmf signal in telephone network or data network, further improve the dtmf signal safety of transmission.
Need to prove the user terminal among the present invention, the input of the dtmf signal that can be undertaken by physical button, the also input of the dtmf signal that can be undertaken by soft-key button.And above-mentioned user terminal can comprise mobile phone, landline telephone and PDA etc.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (20)
1. the transmission method of a dual tone multi-frequency dtmf signal comprises step:
A, the synchronous dtmf signal encryption rule of user terminal and service end;
B is converted to the encryption dtmf signal according to described dtmf signal encryption rule with the dtmf signal of described user terminal, and sends to described service end;
C, described service end receives encrypts dtmf signal, and according to described dtmf signal encryption rule described encryption dtmf signal is decrypted,
Wherein, described dtmf signal is a kind of voice signal carrier wave of particular frequencies;
Wherein, described encryption rule comprises that encrypting out of order table encryption method, stream cipher encrypting method and passback in real time encrypts a kind of in the crossfire encryption method, and dtmf signal still shows as dtmf signal through after the encryption.
2. the transmission method of dtmf signal as claimed in claim 1 is characterized in that, described steps A comprises step:
Described service end generates described encryption rule;
Described user terminal is downloaded described encryption rule from described service end.
3. the transmission method of dtmf signal as claimed in claim 1 is characterized in that, described steps A comprises step:
Described user terminal generates described encryption rule;
Described user terminal uploads to described service end with described encryption rule.
4. the transmission method of dtmf signal as claimed in claim 1 is characterized in that, described encryption rule comprises cryptographic algorithm and/or decipherment algorithm.
5. the transmission method of dtmf signal as claimed in claim 4 is characterized in that, described encryption rule further comprises encrypts the switch sign, also comprises before described step B:
User terminal judges whether encrypt the switch sign opens, if open, then be converted to the encryption dtmf signal and send to described service end according to the dtmf signal of described dtmf signal encryption rule with described user terminal, otherwise, the dtmf signal of user terminal is not encrypted conversion directly sends to described service end;
Before described step C, also comprise:
Described service end receives dtmf signal, judges whether the encryption switch sign in the encryption rule opens, if open, then described encryption dtmf signal is decrypted according to described dtmf signal encryption rule, otherwise, described dtmf signal is not decrypted operation.
6. the transmission method of dtmf signal as claimed in claim 5 is characterized in that, described encryption rule further comprises the term of validity, also comprises before described steps A:
User terminal or service end are judged the term of validity of encryption rule, if term of validity inefficacy, then synchronous crypto-operation rule again.
7. the transmission method of dtmf signal as claimed in claim 1 is characterized in that, described encryption rule comprises encrypts out of order table, and described step B comprises step:
According to the out of order table of encryption in the described dtmf signal encryption rule dtmf signal of described user terminal is mapped as the corresponding dtmf signal of encrypting in the out of order table, and sends to described service end;
Described step C comprises step:
Described service end receives encrypts dtmf signal, and according to the out of order table of encryption in the described dtmf signal encryption rule described encryption dtmf signal is decrypted.
8. as the transmission method of any described dtmf signal in the claim 4 to 6, it is characterized in that described encryption rule comprises the stream cipher encrypting algorithm, described step B comprises step:
Utilize the initial encryption vector that the dtmf signal of user's input is encrypted;
Carry out converting dtmf signal output to after the Hash operation to encrypting output, and send to service end.
9. the transmission system of a dtmf signal comprises user terminal and service end, it is characterized in that,
User terminal is used to preserve encryption rule, receives the also dtmf signal of monitor user ' input, and the dtmf signal of input is converted to new dtmf signal according to encryption rule, sends to service end then;
Service end is used to preserve encryption rule, receives the dtmf signal from the user terminal end, according to encryption rule the dtmf signal of receiving is decrypted,
Wherein, described dtmf signal is a kind of voice signal carrier wave of particular frequencies;
Wherein, described encryption rule comprises that encrypting out of order table encryption method, stream cipher encrypting method and passback in real time encrypts a kind of in the crossfire encryption method, and dtmf signal still shows as dtmf signal through after the encryption.
10. transmission system as claimed in claim 9 is characterized in that,
Described service end also is used for producing and safeguarding encryption rule;
Described user terminal also is used for from service end by network download encryption rule and preservation.
11. transmission system as claimed in claim 9 is characterized in that, described user terminal comprises encryption rule memory cell, dtmf signal detecting unit and dtmf signal ciphering unit;
The encryption rule memory cell is used to store dtmf signal and encrypts required encryption rule, and encryption rule comprises cryptographic algorithm and encryption key message;
The dtmf signal detecting unit is used to detect whether user's input is dtmf signal, if then dtmf signal is sent to the dtmf signal ciphering unit;
The dtmf signal ciphering unit is used to receive the dtmf signal that the dtmf signal detecting unit sends, and according to the encryption rule of encryption rule cell stores, dtmf signal is encrypted, and the dtmf signal after will encrypting sends to service end.
12. transmission system as claimed in claim 11 is characterized in that, described user terminal also comprises the encryption rule acquiring unit, is used for obtaining encryption rule from service end, and encryption rule is stored in the encryption rule memory cell.
13. transmission system as claimed in claim 12, it is characterized in that, described user terminal comprises that also encryption rule upgrades detecting unit, be used for and serve end communication and detect and whether to need to carry out the DTMF encryption rule and upgrade, if then send encryption rule and obtain message to the encryption rule acquiring unit;
Described encryption rule acquiring unit after being used to receive described encryption rule and obtaining message, obtains encryption rule from service end, and upgrades the encryption rule of storing in the encryption rule memory cell.
14., it is characterized in that described encryption rule can also comprise encrypting opens sign as claim 11 or 12 or 13 described transmission systems;
Described dtmf signal ciphering unit is used for judging the encryption of encryption rule opens to indicate whether be in opening, if, then the dtmf signal of receiving is encrypted, otherwise, dtmf signal is not encrypted.
15. transmission system as claimed in claim 14, it is characterized in that, described user terminal comprises encrypting enables control unit, be used to detect the signaling feedback of service end, when the service end signaling of signaling feedback and the encryption unlatching of setting is identical, encrypt the unlatching sign and be set to opening, otherwise be set to closed condition.
16. transmission system as claimed in claim 9 is characterized in that, described service end comprises encryption rule memory cell, dtmf signal detecting unit and dtmf signal decrypting device;
The encryption rule memory cell is used to store the required encryption rule of dtmf signal deciphering;
The dtmf signal detecting unit is used to detect whether the signal of receiving is dtmf signal, if then dtmf signal is sent to the dtmf signal decrypting device;
The dtmf signal decrypting device is used to receive the dtmf signal that the dtmf signal detecting unit sends, and according to the encryption rule of encryption rule cell stores, dtmf signal is decrypted.
17. transmission system as claimed in claim 16 is characterized in that, service end also comprises the encryption rule generation unit, is used to produce encryption rule, and is stored in the encryption rule memory cell.
18. transmission system as claimed in claim 17 is characterized in that, server device also comprises encryption rule update notification unit, is used for and the user terminal communication, and whether informing user terminal needs to upgrade encryption rule.
19., it is characterized in that encryption rule comprises encrypting opens sign as any described transmission system in the claim 16 to 18;
Described dtmf signal decrypting device judges the encryption in the encryption rule opens to indicate whether be in opening when receiving dtmf signal, if, then dtmf signal is decrypted, otherwise, do not need dtmf signal is decrypted.
20. transmission system as claimed in claim 19 is characterized in that, service end comprises encrypting enables notification unit, is used for sending the signaling of opening or closing encryption unlatching sign to user terminal.
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| CN2007100637556A CN101242453B (en) | 2007-02-08 | 2007-02-08 | A transmission method and system for dual-audio multi-frequency signal |
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| CN102904725B (en) * | 2012-10-22 | 2016-02-10 | 广东欧珀移动通信有限公司 | A kind of cipher-code input method, device and mobile terminal |
| CN103595844A (en) * | 2013-11-15 | 2014-02-19 | 深圳市中兴移动通信有限公司 | Processing method and device for dual-tone multi-frequency number |
| CN105791296A (en) * | 2016-03-08 | 2016-07-20 | 浪潮集团有限公司 | Method for quickly scrambling and descrambling network message |
| CN112887336B (en) * | 2018-05-04 | 2023-05-05 | 广东电网有限责任公司 | Communication safety protection method and device |
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| CN1631038A (en) * | 2002-02-07 | 2005-06-22 | 诺基亚公司 | A hybrid network encrypt/decrypt scheme |
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| US5481611A (en) * | 1993-12-09 | 1996-01-02 | Gte Laboratories Incorporated | Method and apparatus for entity authentication |
| CN1199892A (en) * | 1997-05-20 | 1998-11-25 | 安尼株式会社 | Encryption communication system for generating passwords on basis of start information on both parties of communication |
| CN1283023A (en) * | 1999-09-30 | 2001-02-07 | 深圳市中兴通讯股份有限公司 | Encryption method and system for data transmission system of dual-tone signals |
| CN1631038A (en) * | 2002-02-07 | 2005-06-22 | 诺基亚公司 | A hybrid network encrypt/decrypt scheme |
| CN2713753Y (en) * | 2004-07-01 | 2005-07-27 | 聂舒 | Encryption telephone and telephone service system thereof |
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