CN102413100A - Voice-print authentication system having voice-print password picture prompting function and realization method thereof - Google Patents
Voice-print authentication system having voice-print password picture prompting function and realization method thereof Download PDFInfo
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Abstract
The invention discloses a voice-print authentication system having a voice-print password picture prompting function, which comprises a password establishing module, a voice recognition module and a voice-print recognition module; the password establishing module is connected with a server, a password is a random password or consists of a random password and a fixed password, the server generates the random password, and the random password is displayed on a login terminal of a user in a picture format; the voice recognition module is used for analyzing content of voice provided by the user and for performing the mode matching of the voice content provided by the user and the password content generated by the server, if the voice content is not matched with the password content, the password provided by the user is proved not to satisfy the requirement, and if the voice content is matched with the password content, the voice-print recognition module is entered; and the voice-print recognition module is divided into a register unit and a test unit, wherein a speaker model is established in the register unit, and the test unit calls the speaker model to analyze the characteristics of the provided voice in test and to execute the confirmation judgment so as to determine to accept or to refuse. In addition, the invention also discloses a realization method of the system. Due to the adoption of the system and the method, the security of the voice-print authentication can be improved.
Description
Technical field
The present invention relates to a kind of voiceprint system, relate in particular to a kind of voiceprint system of vocal print password picture prompting; In addition, the invention still further relates to a kind of implementation method of voiceprint system of vocal print password picture prompting.
Background technology
At present, usually for safety, need different ciphers be set, increase user's memory burden and non-ease for use for different objects based on the system of the authentication of password.Adopt method for recognizing sound-groove, the sound characteristic through the user carries out identity validation, has only the sound of real user can be through authentication.In order to alleviate user's memory burden, server provides content of text (like Chinese idiom and numeric string etc.), and the user is as long as read content corresponding on request.Yet, there are various potential safety hazards on the network, if the assailant directly obtains content of text, might carry out various attack, as threaten user's cryptosecurity through modes such as splicing user speech, the user speech of copying illegally.What wherein, harm was maximum is to attack through rogue program.
Therefore, need a kind of voiceprint of research and development system, be used for increasing the difficulty that rogue program cracks the Application on Voiceprint Recognition password, to improve the fail safe of system.
Summary of the invention
The technical problem that the present invention will solve provides a kind of voiceprint system of vocal print password picture prompting; Because the difficulty of image content recognition technology reaches in the time restriction of server for the strictness of user's login; This will increase the difficulty that cracks greatly, improve the fail safe of system.For this reason, the present invention also provides a kind of implementation method of voiceprint system of vocal print password picture prompting.
For solving the problems of the technologies described above, the present invention provides a kind of voiceprint system of vocal print password picture prompting, and comprising: password is set up module, sound identification module and voiceprint identification module; This password is set up module and is linked to each other with server; This password is random cipher or is made up of random cipher and fixed password; Server produces random cipher, and this random cipher is presented at user's login terminal with picture format, and the user provides relevant voice according to picture; The voice that this sound identification module is used for the user is provided carry out content analysis; Password content to the voice content that provides and server produce is carried out pattern matching, if both do not meet, explains that the password that the user provides is nonconforming; If both conform to, then get into voiceprint identification module; This voiceprint identification module is divided into registering unit and test cell, sets up speaker model in registering unit, calls speaker model at test cell, and the phonetic feature that provides during analytical test carries out one and confirms judgement, accepts or refusal.
When said password was set up password in the module and is made up of random cipher and fixed password, the random cipher of the form that only Shows Picture was given the user.
Set up speaker model in registering unit in the said voiceprint identification module; Be specially: the speaker provides the speech data of plurality of sections fixed password and random number word string; On the basis of the universal background model that a large amount of voice trainings by a large amount of speakers go out; Through the maximum a posteriori probability adaptive algorithm this speaker's model parameter is estimated, set up this speaker model.
Call speaker model at test cell in the said voiceprint identification module, the phonetic feature that provides during analytical test obtains a coupling scoring of tested speech and this speaker model coupling; And the threshold value that will mark with voiceprint matees, and carries out one and confirms judgement, if scoring is greater than threshold value; Then accept; Otherwise,, then refuse if scoring is lower than threshold value.
In addition, the present invention also provides the implementation method of the voiceprint system of this vocal print password picture prompting, comprises the steps:
(1) server produces random cipher, is presented at user's login terminal with picture format;
(2) user provides relevant voice according to picture;
(3) sound identification module carries out content analysis to the voice that the user provides, and the voice content and the password content that provide are carried out pattern matching, judges whether both conform to; If do not meet; Explain that the password that the user provides is nonconforming, should give refusal, get back to step (2); If conform to, then get into step (4);
(4) at registration phase, voiceprint identification module is set up speaker model; At test phase, voiceprint identification module is called speaker model, and the phonetic feature that provides during analytical test carries out one and confirms judgement, accepts or refusal.
In the step (1), password is random cipher or is made up of random cipher and fixed password that when password was made up of random cipher and fixed password, the random cipher of the form that only Shows Picture was given the user.
In the step (4); Saidly set up speaker model at registration phase; Be specially: the speaker provides the speech data of plurality of sections fixed password and random number word string; On the basis of the universal background model that a large amount of voice trainings by a large amount of speakers go out, through the maximum a posteriori probability adaptive algorithm this speaker's model parameter is estimated, set up this speaker model.
In the step (4), said test phase is specially: voiceprint identification module is called speaker model, the phonetic feature that provides during analytical test; Obtain a coupling scoring of tested speech and this speaker model coupling; And the threshold value that will mark with voiceprint matees, and carries out one and confirms judgement, if scoring is greater than threshold value; Then accept process ends; Otherwise if scoring is lower than threshold value, then refusal is got back to step (2).
Beneficial effect of the present invention is: the present invention provides the login password content of Application on Voiceprint Recognition through the mode of picture; Increased the difficulty that the malice instrument cracks the Application on Voiceprint Recognition password; But can not bring any inconvenience basically to the user; Can combine with other safety measures easily, improve the fail safe of voiceprint system.
Description of drawings
Fig. 1 is the modular structure sketch map of system of the present invention;
Fig. 2 is the schematic flow sheet of registration phase in the inventive method;
Fig. 3 is the schematic flow sheet of test phase in the inventive method.
Embodiment
As shown in Figure 1, the voiceprint system of vocal print password picture prompting of the present invention mainly is made up of following three parts:
1. password is set up module.This password is random cipher or is made up of random cipher and fixed password; Server produces random cipher; Fixed password can be set by user oneself, and random cipher is presented at user's login terminal with picture format, and the user provides relevant voice according to picture.Be made up of fixed password and random cipher like user cipher, the random cipher of the form that only Shows Picture is given the user.
2. sound identification module.This module is carried out content analysis to the voice that the user provides, and the password content that the voice content that provides and server produce is carried out pattern matching, judges whether both conform to, if do not meet, explains that the password that the user provides is nonconforming, should give refusal; If conform to, then get into the voiceprint identification module of next stage.For example, server produces random cipher " 123456 ", and this random cipher is presented at user's login terminal with picture format, and the user provides relevant voice (promptly reading the voice of " 123456 ") according to this picture; Then; Sound identification module carries out content analysis to the voice that the user provides, and the content that obtains voice is " 123456 ", and voice content (i.e. " 123456 ") that provides and the password content (i.e. " 123456 ") that server produces are carried out pattern matching; Judge whether both conform to; If do not meet, explain that the password that the user provides is nonconforming, should give refusal; If conform to, then get into the voiceprint identification module of next stage.
3. voiceprint identification module; This module is made up of two parts: registering unit; The speaker provides the speech data of plurality of sections fixed password and random number word string; On the basis of the universal background model (for example gauss hybrid models) that a large amount of voice trainings by a large amount of speakers go out, through maximum a posteriori probability adaptive algorithm (classic algorithm well known in the art) this speaker's model parameter is estimated, set up this speaker model; Test cell, the speaker model of system call statement, the phonetic feature that provides during analytical test; Obtain a coupling scoring of tested speech and the speaker model coupling of this statement, and will mark and the threshold value of voiceprint is mated, carry out an affirmation and adjudicate; If scoring greater than threshold value, is then accepted, otherwise; If scoring is lower than threshold value, then refuse.
The present invention improves the fail safe of vocal print authentication through the voiceprint system of picture prompting vocal print password.Among the present invention; User's password is the random cipher (like Chinese idiom or numeric string etc.) that is produced through the random number generating algorithm by server; Perhaps form and (form by fixed password and random cipher like user cipher by random cipher and fixed password (like the User Defined password); Only show that random cipher gives the user), the password that promptly each user logins employing is at random, when login, just can obtain.Secondly, this random cipher is that the mode through picture is shown to the user, for the user; The suggestion content of identification picture is easy to discern; And for the malicious attack program, this process is the comparison difficulty, obtains the password content and need consume the regular hour.And the process of voiceprint is shorter comparatively speaking; Read 8 numerals like normal word speed and need about 3 seconds; For system safety; So it also is limited that server offers the login time of each step of user, through increasing the difficulty that rogue program obtains the password content, the fail safe that can effectively improve system.And the present invention can combine with other safety measures easily, detects IP address control etc., the fail safe that improves system jointly like the machine synthetic speech.
Application on Voiceprint Recognition belongs to a kind of of biological identification technology, is a speech parameter according to reflection speaker's physiology and behavioural characteristic in the speech waveform, discerns the technology of speaker ' s identity automatically.Different with speech recognition is, the Application on Voiceprint Recognition utilization be the speaker information in the voice signal, and do not consider the words meaning in the voice, it stresses speaker's individual character; And the purpose of speech recognition is the speech content that identifies in the voice signal, does not consider whom the speaker is, it stresses general character.
As shown in Figures 2 and 3, the implementation method of the voiceprint system of vocal print password picture prompting of the present invention mainly comprises the steps:
(1) server produces random cipher, is presented at user's login terminal with picture format;
(2) user provides relevant voice according to picture;
(3) sound identification module carries out content analysis to the voice that the user provides, and the voice content and the password content that provide are carried out pattern matching, judges whether both conform to; If do not meet; Explain that the password that the user provides is nonconforming, should give refusal, get back to step (2); If conform to, then get into step (4);
(4) at registration phase; Voiceprint identification module is set up speaker model and (is promptly registered model; See Fig. 2), be specially: the speaker provides the speech data of plurality of sections fixed password and random number word string, on the basis of the universal background model (for example gauss hybrid models) that a large amount of voice trainings by a large amount of speakers go out; Through maximum a posteriori probability adaptive algorithm (classic algorithm well known in the art) this speaker's model parameter is estimated, set up this speaker's model; At test phase, voiceprint identification module is called speaker model (promptly registering model), the phonetic feature that provides during analytical test; Obtain a coupling scoring of tested speech and this declaration model coupling; And the threshold value that will mark with voiceprint matees, and carries out one and confirms judgement, if scoring is greater than threshold value; Then accept, flow process finishes; Otherwise if scoring is lower than threshold value, then refusal is got back to step (2) (see figure 3).
The present invention proposes the picture reminding method of vocal print password; The user is before carrying out the speech cipher attack; At first to obtain the content of text that picture shows; Because the difficulty of image content identification reaches in the time restriction of server for the strictness of user's login, this will increase the difficulty that cracks, and improve the fail safe of system.And because the people is very efficient for the identification of image content, the present invention will bring any negative effect can not for real user.
Claims (8)
1. the voiceprint system of a vocal print password picture prompting is characterized in that comprise: password is set up module, sound identification module and voiceprint identification module;
This password is set up module and is linked to each other with server; This password is random cipher or is made up of random cipher and fixed password; Server produces random cipher, and this random cipher is presented at user's login terminal with picture format, and the user provides relevant voice according to picture;
The voice that this sound identification module is used for the user is provided carry out content analysis; Password content to the voice content that provides and server produce is carried out pattern matching, if both do not meet, explains that the password that the user provides is nonconforming; If both conform to, then get into voiceprint identification module;
This voiceprint identification module is divided into registering unit and test cell; Set up speaker model in registering unit; Call speaker model at test cell, the phonetic feature that provides during analytical test carries out one and confirms judgement, accepts or refusal.
2. the voiceprint system of vocal print password picture as claimed in claim 1 prompting is characterized in that, when said password was set up password in the module and is made up of random cipher and fixed password, the random cipher of the form that only Shows Picture was to the user.
3. the voiceprint system of vocal print password picture prompting as claimed in claim 1; It is characterized in that; Set up speaker model in registering unit in the said voiceprint identification module, be specially: the speaker provides the speech data of plurality of sections fixed password and random number word string, on the basis of the universal background model that a large amount of voice trainings by a large amount of speakers go out; Through the maximum a posteriori probability adaptive algorithm this speaker's model parameter is estimated, set up this speaker model.
4. the voiceprint system of vocal print password picture prompting as claimed in claim 1 is characterized in that, calls speaker model at test cell in the said voiceprint identification module; The phonetic feature that provides during analytical test obtains a coupling scoring of tested speech and this speaker model coupling, and will mark and the threshold value of voiceprint is mated; Carry out one and confirm judgement, if scoring greater than threshold value, is then accepted; Otherwise,, then refuse if scoring is lower than threshold value.
5. the implementation method of the voiceprint system of a vocal print password picture prompting is characterized in that, comprises the steps:
(1) server produces random cipher, is presented at user's login terminal with picture format;
(2) user provides relevant voice according to picture;
(3) sound identification module carries out content analysis to the voice that the user provides, and the voice content and the password content that provide are carried out pattern matching, judges whether both conform to; If do not meet; Explain that the password that the user provides is nonconforming, should give refusal, get back to step (2); If conform to, then get into step (4);
(4) at registration phase, voiceprint identification module is set up speaker model; At test phase, voiceprint identification module is called speaker model, and the phonetic feature that provides during analytical test carries out one and confirms judgement, accepts or refusal.
6. the implementation method of the voiceprint system of vocal print password picture prompting as claimed in claim 5; It is characterized in that; In the step (1); Password is random cipher or is made up of random cipher and fixed password that when password was made up of random cipher and fixed password, the random cipher of the form that only Shows Picture was given the user.
7. the implementation method of the voiceprint system of vocal print password picture prompting as claimed in claim 5; It is characterized in that, in the step (4), saidly set up speaker model at registration phase; Be specially: the speaker provides the speech data of plurality of sections fixed password and random number word string; On the basis of the universal background model that a large amount of voice trainings by a large amount of speakers go out, through the maximum a posteriori probability adaptive algorithm this speaker's model parameter is estimated, set up this speaker model.
8. the implementation method of the voiceprint system of vocal print password picture prompting as claimed in claim 5 is characterized in that, in the step (4); Said test phase is specially: voiceprint identification module is called speaker model, and the phonetic feature that provides during analytical test obtains a coupling scoring of tested speech and this speaker model coupling; And the threshold value that will mark with voiceprint matees, and carries out one and confirms judgement, if scoring is greater than threshold value; Then accept process ends; Otherwise if scoring is lower than threshold value, then refusal is got back to step (2).
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Application publication date: 20120411 |