CN101500231A - Mobile terminal, audio data processing method and system - Google Patents
Mobile terminal, audio data processing method and system Download PDFInfo
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- CN101500231A CN101500231A CNA2008102411794A CN200810241179A CN101500231A CN 101500231 A CN101500231 A CN 101500231A CN A2008102411794 A CNA2008102411794 A CN A2008102411794A CN 200810241179 A CN200810241179 A CN 200810241179A CN 101500231 A CN101500231 A CN 101500231A
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Abstract
The invention discloses a method and a system which are used for processing a mobile terminal and voice data so as to improve the safety of voice data transmitted between mobile terminals. The specific technical proposal includes the following steps: a first mobile terminal collects analog voice signals from outside and converts the analog voice signals into digital voice signals; the digital voice signals are encrypted by a secret key which is preset or assigned by a network; the encrypted data is transmitted to the main central processing unit (CPU) of the first mobile terminal; and the network interface of the first mobile terminal is instructed by the CPU to send the encrypted data. According to the technical proposal, the voice data is encrypted before the data is sent to the network from the mobile terminal, and the data is sent in the form of encrypted message in the network, thus improving the safety of the voice data.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to the processing method and the system of a kind of portable terminal, speech data.
Background technology
Development along with mobile communication technology, portable terminal is very universal in people's life, the user has proposed more and more higher requirement to the fail safe and the convenience of mobile communication, particularly in some special industries, the voice approach that increasing sensitive information all passes through portable terminal transmits, how therefore for example business information, personal information, military political message etc., guarantee that the fail safe of the speech data that transmits between the portable terminal seems more and more important.
The speech data that produces when communicating by letter between the portable terminal is based on wireless network transmissions, in the face of the radio network technique that reaches its maturity, obtain the speech data that transmits and become more and more easier in network, therefore, the fail safe when speech data transmits in network is subjected to very big threat.At present, GSM (the Global System for Mobile Communications that generally adopt in the whole world, global system for mobile communications) alleviated this problem to a certain extent, in the GMS network, speech data is to transmit in the mode of ciphertext between portable terminal and base station, but the fail safe when this can only guarantee that speech data transmits between portable terminal and base station, when speech data transmits between other of GSM network is internet, transmit owing to remain in mode expressly, therefore, the fail safe of speech data in whole network transmission process still can not get ensureing, makes that the fail safe of the speech data that transmits between the portable terminal is very low.
Summary of the invention
The invention provides the processing method and the system of a kind of portable terminal, speech data, in order to improve the fail safe of the speech data that transmits between the portable terminal.
The embodiment of the invention is achieved through the following technical solutions:
The embodiment of the invention provides a kind of processing method of speech data, comprising:
First portable terminal is gathered analog voice signal from the outside, and described analog voice signal is converted to audio digital signals;
According to storage in advance or the described audio digital signals of secret key encryption that network side issues;
The encrypt data that encryption is obtained is transmitted to the main central control processor CPU of described first portable terminal, and indicates the network interface of described first portable terminal to send described encrypt data by described host CPU.
The embodiment of the invention also provides a kind of portable terminal, comprising:
Signal acquisition module is used for from outside collection analog voice signal;
Analog-to-digital conversion module is used for the analog voice signal of described signal acquisition module collection is converted to audio digital signals;
Encrypting module is used for the audio digital signals that storage or that network side issues the in advance described pretreatment module of secret key encryption of basis is converted to;
Main central controller CPU is used to receive described encrypting module and encrypts the encrypt data that obtains, and instruct network interface sends described encrypt data.
The embodiment of the invention also provides a kind of treatment system of speech data, comprising:
First portable terminal is used for gathering from the outside analog voice signal, and described analog voice signal is converted to audio digital signals, according to the described audio digital signals of secret key encryption storage or that network side issues in advance; And the encrypt data that encryption obtains is transmitted to the main central control processor CPU of described first portable terminal, and indicate the network interface of described first portable terminal to send described encrypt data by described host CPU;
Second portable terminal, be used for receiving and transmitting the encrypt data of described first portable terminal transmission by host CPU by network interface, according to storage in advance with described first portable terminal in identical or network side issues with described first portable terminal in the identical described encrypt data of secret key decryption, and the audio digital signals that deciphering obtains is converted to analog voice signal.
Pass through technique scheme, when the embodiment of the invention is conversed between portable terminal, after the transmission terminal of speech data (i.e. first portable terminal) is gathered analog voice signal and is carried out analog-to-digital conversion from the outside, according to storage in advance or this audio digital signals of secret key encryption that network side issues, the encrypt data that encryption is obtained is transmitted to the host CPU of described transmission terminal, and send encrypt data by the network interface that host CPU indication sends terminal, according to this technical scheme, speech data is encrypted before sending to network side from portable terminal, it all is to transmit in the mode of ciphertext in network, thus the fail safe that has improved speech data.
Description of drawings
Fig. 1 is the process chart that sender mobile terminal sends speech data in the embodiment of the invention;
Fig. 2 is the process chart that recipient's portable terminal receives speech data in the embodiment of the invention;
Fig. 3 is for possessing the structure chart one of the portable terminal of speech data sending function in the embodiment of the invention;
Fig. 4 is for possessing the structure chart two of the portable terminal of speech data sending function in the embodiment of the invention;
Fig. 5 is for possessing the structure chart one of the portable terminal of speech data receiving function in the embodiment of the invention;
Fig. 6 is for possessing the structure chart two of the portable terminal of speech data receiving function in the embodiment of the invention;
Fig. 7 is the structure chart that possesses the portable terminal of speech data transmission and receiving function in the embodiment of the invention;
Fig. 8 is the treatment system schematic diagram one of speech data in the embodiment of the invention;
Fig. 9 is the treatment system schematic diagram two of speech data in the embodiment of the invention.
Embodiment
In order to improve the fail safe of the speech data that transmits between the portable terminal, the embodiment of the invention has proposed the processing method and the system of a kind of portable terminal, speech data, is explained in detail to the main realization principle of the embodiment of the invention, specific implementation process and to the beneficial effect that should be able to reach below in conjunction with Figure of description.
When in network, transmitting in view of speech data owing to being intercepted and captured the problem that causes the speech data fail safe low easily, the main thought of the embodiment of the invention is: before speech data is sent from the portable terminal of transmit leg, in this portable terminal, speech data is encrypted, thereby made speech data form transmission with ciphertext in network.Arrive recipient's portable terminal when this encrypt data after, the encrypt data deciphering of this portable terminal to receiving, can obtain primary voice data, and before recipient's portable terminal is deciphered speech data, speech data all is that the form with ciphertext exists, even speech data is intercepted and captured in the process of Network Transmission, the intercepted data person also can't obtain primary voice data.
In the embodiment of the invention, at first between portable terminal, appoint key and cryptographic algorithm, be used to utilize this key and cryptographic algorithm that speech data is carried out encryption and decryption, be about to the clear data of speech data and key input information, thereby can obtain the encrypt data of speech data as cryptographic algorithm.Wherein, key has following two kinds of definite modes:
Mode one: key is built in the portable terminal.
Under this mode, general when portable terminal dispatches from the factory with regard to the built-in key that is used for speech data is carried out encryption and decryption, but because the uncertainty of Correspondent Node in the mobile communication, so exist recipient's portable terminal not have the built-in different situation of key in built-in key or built-in key and the sender mobile terminal, therefore, the less use of this mode.
Mode two: built-in a plurality of keys in portable terminal, can regularly select to be used for key according to the rule of between portable terminal, appointing in advance to encrypt voice data, perhaps, private server by network side is specified a key that is used for encrypt voice data according to setting in tactful a plurality of keys of preserving from portable terminal, and the notice portable terminal.
Mode three: by key agreement mechanism according to setting the key that is used in the key updating policy update portable terminal encrypt voice data, for example, according to setting cycle or before each conversation the key in the renewal portable terminal.
This mode is assisted to finish by the private server of network side, particularly:
Generate the key that is used for the speech data encryption and decryption by network side according to setting key algorithm, and this key is sent to the interior portable terminal of specified scope.Wherein, if the key updating strategy is to upgrade according to setting cycle, then the portable terminal in this specified scope can be the portable terminal of this professional user binding of customization, is perhaps selected the user of the number of setting section at random by server; If the key updating strategy is to upgrade before each conversation, then the portable terminal in this specified scope comprises the portable terminal that participation is conversed at least herein, sets flexibly as required herein.
Perhaps, generate key by network side according to the random number of at least one mobile terminal reporting that participates in conversation, and this key is sent to the portable terminal that participates in conversation.
In concrete the application, key can also have multiple generating mode, for example generate key, and be issued to Correspondent Node (being the recipient of speech data), do not enumerate one by one herein by the private server of network side by the portable terminal (being the transmit leg of speech data) of initiating conversation.
According to aforesaid way, after portable terminal receives the key that network side sends, judge whether to preserve in advance key, if the key that then utilizes network side this time to issue is replaced this key of preserving in advance, if not, then directly preserve the key that network side issues.
In the said process, cryptographic algorithm generally is built in the portable terminal, need not to upgrade.But in order further to improve the confidentiality of speech data in the embodiment of the invention, also can be according to setting the Policy Updates cryptographic algorithm, for example, built-in multiple encryption algorithms in portable terminal in advance, the rule that can appoint in advance between portable terminal is regularly selected cryptographic algorithm, perhaps, when issuing key, specify which kind of cryptographic algorithm of selection by private server.
In the embodiment of the invention, can communicate by dedicated channel between private server and the portable terminal, to improve the fail safe of key.
After storing in portable terminal or issue key based on said process, as shown in Figure 1, in the one embodiment of the invention, the processing procedure that sender mobile terminal sends speech data comprises:
In this step, after transmit leg generates voice messaging, gather speech data, generate analog voice signal by the equipment such as microphone of its portable terminal.
In this step, if the insufficient strength of analog voice signal also need be done before conversion this analog voice signal is carried out processing and amplifying.
In this step, the preliminary treatment that audio digital signals is carried out comprises: filtering, data compression, code conversion etc., pretreated purpose is to make audio digital signals to be more suitable in transmitting in network.
In this step, host CPU is looked different mobile terminal and is different, for example, the host CPU that some portable terminal adopts is the control and treatment chip, the host CPU that some portable terminal adopts is the base band control chip, the host CPU that some portable terminal adopts is the parallel processing mode of control and treatment chip and base band control chip, does not enumerate one by one herein.
In the above-mentioned flow process, step 103 can not carried out as required.
By said process, sender mobile terminal sends after with encrypt voice data, by Network Transmission to recipient's portable terminal.As shown in Figure 2, in the one embodiment of the invention, the processing procedure that recipient's portable terminal receives speech data comprises:
Step 201, the ciphertext speech data that passes through the network interface reception in recipient's portable terminal and send by network by host CPU forwarding sender mobile terminal.
Step 202, according to storage in advance or network side issues with sender mobile terminal in the identical ciphertext speech data deciphering of key to receiving.
In this step, key used when in the key of speech data deciphering usefulness and the sender mobile terminal primary voice data being encrypted is identical, and used cryptographic algorithm is identical when in used decipherment algorithm and the sender mobile terminal primary voice data being encrypted.
Step 203, the audio digital signals that deciphering is obtained carry out reprocessing.
In this step, the reprocessing that audio digital signals is carried out comprises: decompression, code conversion etc. particularly, are the anti-process of the preprocessing process that carried out in sender mobile terminal of speech data to the last handling process that speech data carried out in this step.
Step 204, pretreated audio digital signals is converted to analog voice signal.
The analog voice data that device plays such as step 205, the loudspeaker by portable terminal, earphone obtain.
Corresponding with above-mentioned flow process, the embodiment of the invention also provides a kind of portable terminal, as shown in Figure 3, when this portable terminal during as the transmit leg of speech data, comprises following functional module:
Analog-to-digital conversion module 302 is used for the analog voice signal that signal acquisition module 301 is gathered is converted to audio digital signals.
Encrypting module 303 is used for the audio digital signals that storage or that network side issues the in advance secret key encryption analog-to-digital conversion module 302 of basis is converted to.
Main central controller CPU304 be used to receive the encrypt data after encrypting module 303 is encrypted, and instruct network interface sends the encrypt data that receives.
Among the embodiment, above-mentioned encrypting module 303 also is used for:
Receive network side according to setting the key that key algorithm generates;
Or, receive the key of network side according to the random number generation of at least one mobile terminal reporting that participates in conversation.
Further, as shown in Figure 4, above-mentioned portable terminal can further include pretreatment module 305, and the audio digital signals that this unit is used for analog-to-digital conversion module 302 is converted to carries out processing such as filtering, compression, code conversion, and audio digital signals is more suitable in transmitting in network; Correspondingly, above-mentioned encrypting module 303 is used for pretreatment module 305 pretreated audio digital signals are carried out encryption.
As shown in Figure 5, when this portable terminal during, comprise following functional module as the recipient of speech data:
Main central controller CPU501, deciphering module 502, D/A converter module 503 and playing module 504.Wherein:
Main central controller CPU501 is used for receiving the encrypt data of audio digital signals and being transmitted to deciphering module 502 by network interface.
Deciphering module 502 is used for the encrypt data that storage or that network side issues the in advance secret key decryption master's central controller CPU501 of basis transmits.
D/A converter module 503 is used for the audio digital signals that deciphering module 502 deciphering obtain is converted to analog voice signal.
Playing module 504 is used to play the analog voice data that D/A converter module 503 is converted to.
Among the embodiment, above-mentioned deciphering module 502 also is used for:
Receive network side according to setting the key that key algorithm generates;
Or, receive the key of network side according to the random number generation of at least one mobile terminal reporting that participates in conversation.
Further, as shown in Figure 6, above-mentioned portable terminal can further include post-processing module 505, this module is used for that deciphering obtains processing such as audio digital signals decompresses, code conversion to deciphering module 502, particularly, be the anti-process of the preprocessing process that in sender mobile terminal, carried out of speech data to the last handling process that speech data carried out in this module; Correspondingly, above-mentioned D/A converter module 503 is used for the audio digital signals after post-processing module 505 processing is converted to analog voice signal.
Further, as shown in Figure 7, in the one embodiment of the invention, portable terminal possesses the sending function and the receiving function of speech data simultaneously, and this portable terminal comprises above-mentioned all functions module.In the practical application, encrypting module 303 and deciphering module 503 can be integrated in the module; Analog-to-digital conversion module 302 and D/A converter module 503 can be integrated in the module; Pretreatment module 305 and post-processing module 505 can be integrated in the module, and pretreatment module 305 and post-processing module 505 are optional module.
Further, the function of above-mentioned signal acquisition module 301 realizations can be realized by the equipment such as microphone in the existing portable terminal; The function that broadcast unit 504 is realized can be realized by equipment such as the earphone in the existing portable terminal, loudspeaker.
Such scheme according to the embodiment of the invention; the function that analog-to-digital conversion module 302, D/A converter module 503, encrypting module 303, deciphering module 502, pretreatment module 305 and post-processing module 505 are realized can be integrated in the data processing unit; this device is independent of the hardware and software platform of portable terminal; outside visit to this device is subjected to strict restriction; have only the manufacturer of device or the operator of specified right to change to this device; thereby make this device be in closed state, the data content in the device is protected.Particularly, this device is connected between the microphone input equipment and host CPU of existing portable terminal, this host CPU may be for the control and treatment chip or/and the base band control chip, thereby make the speech data of microphone input directly enter this data processing equipment, be enciphered data from the data of this device output, prevent owing to the monitored leakage that causes speech data of the operating system of portable terminal, because the encryption process of data is carried out at bottom, the speech data that arrives operating system has been an encrypt data.And, mostly the data processing mechanism of the host CPU chip that adopts in the portable terminal is opaque at present, therefore be difficult to guarantee that data enter the later fail safe of host CPU, technical scheme according to the embodiment of the invention, before entering host CPU, data data are encrypted, therefore, even data are monitored in host CPU or stolen, also be difficult to data are decrypted to obtain primary voice data.
Corresponding with above-mentioned flow process, the embodiment of the invention also provides a kind of treatment system of speech data, and as shown in Figure 8, this system comprises:
First portable terminal 801, be used for from outside collection analog voice signal, and analog voice signal is converted to audio digital signals, according to storage in advance or secret key encryption audio digital signals that network side issues, and the encrypt data that encryption obtains is transmitted to the main central control processor CPU of first portable terminal 801, and indicate the network interface of first portable terminal 801 to send this encrypt data by host CPU;
Second portable terminal 802, be used for receiving and transmitting the encrypt data of first portable terminal, 801 transmissions by host CPU by network interface, according to storage in advance with this first portable terminal in identical or network side issues with this first portable terminal in the encrypt data that receives of identical secret key decryption, and the audio digital signals that deciphering obtains is converted to analog voice signal.
Further, as described in Figure 9, this system also comprises key agreement server 803, is used for generating key according to setting key algorithm, and is handed down to first portable terminal 801 and second portable terminal 802; Perhaps, or/and the random number that second portable terminal 802 reports generates key, and be handed down to first portable terminal 801 and second portable terminal 802 according to first portable terminal 801.Particularly, this server can be according to new key and issuing more before the conversation between setting cycle or the portable terminal.
Correspondingly, above-mentioned first portable terminal 801 or second portable terminal 802 also are used for:
Receive key agreement server 803 according to setting the key that key algorithm generates;
Or, receive the key of key agreement server 803 according to the random number generation of at least one mobile terminal reporting that participates in conversation.
Pass through technique scheme, when the embodiment of the invention is conversed between portable terminal, after the transmission terminal of speech data (i.e. first portable terminal) is gathered analog voice signal and is carried out analog-to-digital conversion from the outside, according to storage in advance or this audio digital signals of secret key encryption that network side issues, the encrypt data that encryption is obtained is transmitted to the host CPU of described transmission terminal, and send encrypt data by the network interface that host CPU indication sends terminal, according to this technical scheme, speech data is encrypted before sending to network side from portable terminal, it all is to transmit in the mode of ciphertext in network, thereby overcome the hidden danger of being intercepted and captured by audiomonitor in the network service, the fail safe that has improved speech data.
Further, be used for speech data is carried out the key of encryption and decryption in the embodiment of the invention, can be by consulting between portable terminal and the network side private server, and this key can upgrade according to setting cycle or before each conversation, thereby reduced the listener-in and accumulated the possibility that cracks key behind a large amount of communicating datas, under the situation that voice call is extensively popularized, guaranteed user's conversation safety.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1, a kind of processing method of speech data is characterized in that, comprising:
First portable terminal is gathered analog voice signal from the outside, and described analog voice signal is converted to audio digital signals;
According to storage in advance or the described audio digital signals of secret key encryption that network side issues;
The encrypt data that encryption is obtained is transmitted to the main central control processor CPU of described first portable terminal, and indicates the network interface of described first portable terminal to send described encrypt data by described host CPU.
2, the method for claim 1 is characterized in that, the key that network side issues comprises:
By the key of network side according to the generation of setting key algorithm;
Or, by the key of network side according to the random number generation of at least one mobile terminal reporting that participates in conversation.
3, method as claimed in claim 1 or 2 is characterized in that, the key that network side issues upgrades according to setting cycle or upgrades before each conversation.
4, the method for claim 1 is characterized in that, also comprises:
Second portable terminal receives by its network interface and transmits the encrypt data that described first portable terminal sends by its host CPU;
According to storage in advance with described first portable terminal in identical or network side issues with described first portable terminal in the identical described encrypt data of secret key decryption;
The audio digital signals that deciphering is obtained is converted to analog voice signal.
5, a kind of portable terminal is characterized in that, comprising:
Signal acquisition module is used for from outside collection analog voice signal;
Analog-to-digital conversion module is used for the analog voice signal of described signal acquisition module collection is converted to audio digital signals;
Encrypting module is used for the audio digital signals that storage or that network side issues the in advance described analog-to-digital conversion module of secret key encryption of basis is converted to;
Main central controller CPU is used to receive described encrypting module and encrypts the encrypt data that obtains, and instruct network interface sends described encrypt data.
6, portable terminal as claimed in claim 5 is characterized in that, described encrypting module also is used for:
Receive network side according to setting the key that key algorithm generates;
Or, receive the key of network side according to the random number generation of at least one mobile terminal reporting that participates in conversation.
7, portable terminal as claimed in claim 5 is characterized in that, described main central controller CPU also is used for:
Receive the encrypt data and the forwarding of audio digital signals by network interface;
Described portable terminal also comprises:
Deciphering module is used for the encrypt data according to the described host CPU forwarding of secret key decryption storage or that network side issues in advance;
D/A converter module is used for the audio digital signals that described deciphering module deciphering obtains is converted to analog voice signal.
8, portable terminal as claimed in claim 7 is characterized in that, described deciphering module also is used for:
Receive network side according to setting the key that key algorithm generates;
Or, receive the key of network side according to the random number generation of at least one mobile terminal reporting that participates in conversation.
9, a kind of treatment system of speech data is characterized in that, comprising:
First portable terminal, be used for from outside collection analog voice signal, and described analog voice signal is converted to audio digital signals, according to storage in advance or the described audio digital signals of secret key encryption that network side issues, and the encrypt data that encryption obtains is transmitted to the main central control processor CPU of described first portable terminal, and indicate the network interface of described first portable terminal to send described encrypt data by described host CPU;
Second portable terminal, be used for receiving and transmitting the encrypt data of described first portable terminal transmission by host CPU by network interface, according to storage in advance with described first portable terminal in identical or network side issues with described first portable terminal in the identical described encrypt data of secret key decryption, and the audio digital signals that deciphering obtains is converted to analog voice signal.
10, system as claimed in claim 9 is characterized in that, described first portable terminal or second portable terminal also are used for:
Receive network side according to setting the key that key algorithm generates;
Or, receive the key of network side according to the random number generation of at least one mobile terminal reporting that participates in conversation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102411794A CN101500231A (en) | 2008-12-26 | 2008-12-26 | Mobile terminal, audio data processing method and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102411794A CN101500231A (en) | 2008-12-26 | 2008-12-26 | Mobile terminal, audio data processing method and system |
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| CN101500231A true CN101500231A (en) | 2009-08-05 |
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| CNA2008102411794A Pending CN101500231A (en) | 2008-12-26 | 2008-12-26 | Mobile terminal, audio data processing method and system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223234A (en) * | 2011-06-17 | 2011-10-19 | 飞天诚信科技股份有限公司 | Electronic signature system and method based on audio communication |
| CN102843677A (en) * | 2012-08-14 | 2012-12-26 | 福建伊时代信息科技股份有限公司 | Voice communication method, device and system |
| CN103067333A (en) * | 2011-10-18 | 2013-04-24 | 华为终端有限公司 | Method for verifying set top box access identity and authentication server |
| CN106059755A (en) * | 2016-06-28 | 2016-10-26 | 努比亚技术有限公司 | Encryption communication method and device |
| CN106878277A (en) * | 2017-01-06 | 2017-06-20 | 力同科技股份有限公司 | A kind of method and device based on DMR standard implementation voice encryptions |
| WO2017114156A1 (en) * | 2015-12-30 | 2017-07-06 | 哈尔滨海能达科技有限公司 | Method for encrypted transmission of data, base station and pdt terminal |
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2008
- 2008-12-26 CN CNA2008102411794A patent/CN101500231A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223234A (en) * | 2011-06-17 | 2011-10-19 | 飞天诚信科技股份有限公司 | Electronic signature system and method based on audio communication |
| US9172536B2 (en) | 2011-06-17 | 2015-10-27 | Feitian Technologies Co., Ltd. | Audio communication based electronic signature system and method thereof |
| CN103067333A (en) * | 2011-10-18 | 2013-04-24 | 华为终端有限公司 | Method for verifying set top box access identity and authentication server |
| CN103067333B (en) * | 2011-10-18 | 2016-03-30 | 华为终端有限公司 | The method of proof machine top box access identity and certificate server |
| CN102843677A (en) * | 2012-08-14 | 2012-12-26 | 福建伊时代信息科技股份有限公司 | Voice communication method, device and system |
| WO2017114156A1 (en) * | 2015-12-30 | 2017-07-06 | 哈尔滨海能达科技有限公司 | Method for encrypted transmission of data, base station and pdt terminal |
| CN106936786A (en) * | 2015-12-30 | 2017-07-07 | 哈尔滨海能达科技有限公司 | A kind of data encryption and transmission method, base station and PDT terminals |
| CN106936786B (en) * | 2015-12-30 | 2020-12-22 | 哈尔滨海能达科技有限公司 | Data encryption transmission method, base station and PDT terminal |
| CN106059755A (en) * | 2016-06-28 | 2016-10-26 | 努比亚技术有限公司 | Encryption communication method and device |
| CN106878277A (en) * | 2017-01-06 | 2017-06-20 | 力同科技股份有限公司 | A kind of method and device based on DMR standard implementation voice encryptions |
| CN106878277B (en) * | 2017-01-06 | 2020-06-12 | 力同科技股份有限公司 | Method and device for realizing voice encryption based on DMR standard |
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Application publication date: 20090805 |