CN112073962A - Real-time interactive application-oriented packet rearrangement hidden channel construction method and system - Google Patents

Real-time interactive application-oriented packet rearrangement hidden channel construction method and system Download PDF

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Publication number
CN112073962A
CN112073962A CN202010546822.5A CN202010546822A CN112073962A CN 112073962 A CN112073962 A CN 112073962A CN 202010546822 A CN202010546822 A CN 202010546822A CN 112073962 A CN112073962 A CN 112073962A
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determining
voice
value
block
secret information
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张小松
郭琳虹
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Tangshan University
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Tangshan University
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/40—Support for services or applications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/70—Media network packetisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H04W28/065—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information using assembly or disassembly of packets

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The invention relates to a packet rearrangement hidden channel construction method and system for real-time interactive application. Gray codes are adopted to improve robustness aiming at network jitter, and modulus operation, interval expansion and parameter balancing are adopted to improve detection resistance. Because the invention utilizes the high bandwidth of VoLTE flow and the interleaving characteristic of voice and video data packets, the built covert channel can obtain high capacity while the robustness and the undetectable property are maintained. Meanwhile, the invention can also adjust the flow balance parameter according to the current flow condition through the flow characteristic learning to resist the jitter interference of the communication process and the active attack of the opponent.

Description

Real-time interactive application-oriented packet rearrangement hidden channel construction method and system
Technical Field
The invention relates to the field of packet rearrangement hidden channel construction, in particular to a packet rearrangement hidden channel construction method and system for real-time interactive application.
Background
With full service support for voice and video calls over LTE networks, operators have begun to initiate large-scale commercial services worldwide. With the carrier class VoLTE, the performance of voice calls is better than any best-effort voice over internet protocol (VoIP) service. Global-wide video calls over VoLTE will likely become the next generation communication service while providing higher quality voice services during the call. In order to establish an efficient covert channel, many solutions to specific problems already exist. However, most existing approaches focus on creating a covert channel for VoIP voice and video traffic. Therefore, it would be necessary to design an efficient covert channel based on VoLTE to convey secret information. However, the conventional solution based on inter-packet gaps cannot be applied to VoLTE due to traffic characteristics of VoLTE. The existing covert communication method oriented to real-time interactive application has the phenomenon that the jitter interference of communication flow and active attack from an attacker are difficult to resist.
Disclosure of Invention
The invention aims to provide a packet rearrangement hidden channel construction method and a system for real-time interactive application, which realize hidden communication by rearranging voice packets and video packets in communication flow.
In order to achieve the purpose, the invention provides the following scheme:
a packet rearrangement hidden channel construction method for real-time interactive application comprises the following steps:
determining the number bl of secret information bits embedded in each voice packet interval block;
determining the number pn of video packets in the current voice packet interval block;
numbering the voice spacing blocks to obtain spacing block numbers bn;
determining a voice interval block value bv according to the number pn of the video packets and the number bl of the secret information bits;
acquiring the current network jitter condition;
determining a balance span sp according to the current network jitter condition;
judging whether the voice interval blocks with the numbers need to be subjected to weighing processing or not according to the weighing span sp and the interval block number bn;
if yes, determining a balance value cv according to the public communication traffic characteristic learning result;
converting the trade-off value cv into a corresponding gray value gv according to a gray code;
if not, intercepting the secret information with the corresponding length according to the number bl of the secret information embedded in each voice interval block, and converting the secret information with the corresponding length into a corresponding gray value gv according to a gray code;
judging whether the voice interval block value bv is smaller than the gray value gv;
if yes, transferring (gv-bv) video packets from the next voice interval block to the current voice interval block for transmission;
if not, transferring (bv-gv) video packets from the current voice interval block to the next voice interval block for transmission;
judging whether all secret information is embedded completely;
if yes, the covert communication is ended;
if not, returning to the step of determining the number pn of the video packets in the current voice packet interval block.
Optionally, the determining the number bl of the secret information bits embedded in each voice packet interval block specifically includes:
the sender and the receiver jointly determine the number bl of the secret information embedded in each voice packet interval block through negotiation before covert communication.
Optionally, the determining a voice interval block value bv according to the number pn of the video packets and the number bl of the secret information bits specifically includes:
determining the value bv of the voice interval block by adopting a modulus operation formula bv as pn% 2 according to the number pn of the video packets and the number bl of the secret information bitsblAnd determining a block value bv of the voice interval block.
Optionally, the obtaining the current network jitter condition specifically includes:
and determining the current network jitter condition according to the delay difference between the receiving of the continuous data packets at the receiving party and the sending of the continuous data packets at the sending party.
Optionally, the determining, according to the balance span sp and the spacer number bn, whether the speech spacers with the respective numbers need to be subjected to balance processing specifically includes:
determining whether bn% sp is 1 according to the balance span sp and the spacer block number bn;
if yes, the voice interval blocks of all the numbers need to be subjected to weighing processing;
if not, the voice interval blocks of each number do not need to be weighted.
A packet rearrangement hidden channel construction system for real-time interactive application comprises:
the secret information bit number determining module is used for determining the secret information bit number bl embedded in each voice packet interval block;
the video packet number determining module is used for determining the number pn of video packets in the current voice packet interval block;
the spacing block number determining module is used for numbering the voice spacing blocks to obtain spacing block numbers bn;
a voice interval block value determining module, configured to determine a voice interval block value bv according to the number pn of the video packets and the number bl of the secret information bits;
the current network jitter condition acquisition module is used for acquiring the current network jitter condition;
a balance span determining module, configured to determine a balance span sp according to the current network jitter condition;
the first judgment module is used for judging whether the voice interval blocks with the numbers need to be subjected to weighing processing according to the weighing span sp and the interval block number bn;
the device comprises a balance value determining module, a balance value determining module and a balance value determining module, wherein the balance value determining module is used for determining a balance value cv according to a public communication traffic characteristic learning result when balance processing is required;
the first gray value conversion module is used for converting the balance value cv into a corresponding gray value gv according to a gray code;
the second gray value conversion module is used for intercepting the secret information with the corresponding length according to the number bl of the secret information embedded in each voice interval block when the weighing processing is not needed, and converting the secret information with the corresponding length into a corresponding gray value gv according to a gray code;
a second judging module, configured to judge whether the speech interval block value bv is smaller than the gray value gv;
a first sending module, configured to transfer (gv-bv) video packets from a next voice interval block to a current voice interval block for sending when the voice interval block value bv is smaller than the gray value gv;
a second sending module, configured to transfer (bv-gv) video packets from a current speech interval block to a next speech interval block for sending when the speech interval block value bv is greater than or equal to the gray value gv;
the third judging module is used for judging whether all the secret information is embedded;
the end module is used for finishing covert communication when all the secret information is embedded;
and the returning module is used for returning the video packet number determining module.
Optionally, the secret information bit number determining module specifically includes:
and the secret information bit number determining unit is used for determining the secret information bit number bl embedded in each voice packet interval block together through negotiation before covert communication between the sender and the receiver.
Optionally, the voice partition block value determining module specifically includes:
a voice interval block value determining unit, configured to determine, according to the number of video packets pn and the number of secret information bits bl, a voice interval block value bv using a modulo arithmetic formula bv ═ pn% 2blAnd determining a block value bv of the voice interval block.
Optionally, the current network jitter condition obtaining module specifically includes:
and the current network jitter condition acquisition unit is used for determining the current network jitter condition according to the delay difference between the receiving of the continuous data packets at the receiving party and the sending of the continuous data packets at the sending party.
Optionally, the first determining module specifically includes:
a judging unit, configured to determine whether bn% sp is 1 according to the balance span sp and the spacer block number bn;
when bn% sp is 1, the speech spacing blocks of each number need to be weighted;
when bn% sp is not 1, the speech interval blocks of each number do not need to be weighted.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a packet rearrangement hidden channel construction method and system for real-time interactive application. Gray codes are adopted to improve robustness aiming at network jitter, and modulus operation, interval expansion and parameter balancing are adopted to improve detection resistance. Because the invention utilizes the high bandwidth of VoLTE flow and the interleaving characteristic of voice and video data packets, the built covert channel can obtain high capacity while the robustness and the undetectable property are maintained. Meanwhile, the invention can also adjust the flow balance parameter according to the current flow condition through the flow characteristic learning to resist the jitter interference of the communication process and the active attack of the opponent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a flow chart of a packet rearrangement hidden channel construction method for real-time interactive application according to the present invention;
fig. 2 is a structural diagram of a packet rearrangement hidden channel construction system oriented to real-time interactive application in the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a packet rearrangement hidden channel construction method and a system for real-time interactive application, which realize hidden communication by rearranging voice packets and video packets in communication flow.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
VoLTE video is coded using the h.264 codec and speech is coded using the AMR-WB codec. Since the delay of the voice packet is smaller than that of the video packet, the number of video packets in the voice packet interval received by the receiving side is different from the number of video packets in the voice packet interval when the transmitting side transmits the video packets. Therefore, we can try to construct a blind channel by rearranging the order of the video packets and the voice packets.
As the existing covert communication method facing real-time interactive application has the phenomenon that the jitter interference of communication flow and active attack from an attacker are difficult to resist, the method can improve the robustness and the anti-detection capability of a covert channel by means of rearrangement of voice packets and video packets, Gray code numbering, packet interval expansion and the like, and effectively resist passive interference and active attack.
The secret message is transmitted by reordering the video packets, the coding symbols being represented by the number of video packets in the speech packet interval. Gray codes are adopted to improve robustness aiming at network jitter, and modulus operation, interval expansion and parameter balancing are adopted to improve detection resistance. Since this solution takes advantage of the high bandwidth of VoLTE traffic and the voice-video packet interleaving characteristics, the constructed covert channel can also achieve high capacity while maintaining robustness and non-detectability. Meanwhile, the scheme can also adjust the flow balance parameters according to the current flow condition through flow characteristic learning to resist the jitter interference of the communication process and the active attack of an opponent. Fig. 1 is a flow chart of a packet rearrangement hidden channel construction method for real-time interactive application in the invention. As shown in fig. 1, a packet rearrangement hidden channel construction method for real-time interactive application includes:
step 101: determining the number bl of the secret information bits embedded in each voice packet interval block, specifically comprising:
the sender and the receiver jointly determine the number bl of the secret information embedded in each voice packet interval block through negotiation before covert communication.
Step 102: and determining the number pn of video packets in the current voice packet interval block.
Step 103: and numbering the voice interval blocks to obtain interval block numbers bn.
Step 104: determining a voice interval block value bv according to the number pn of the video packets and the number bl of the secret information bits, specifically comprising:
determining the value bv of the voice interval block by adopting a modulus operation formula bv as pn% 2 according to the number pn of the video packets and the number bl of the secret information bitsblAnd determining a block value bv of the voice interval block.
Step 105: acquiring a current network jitter condition, specifically comprising:
and determining the current network jitter condition according to the delay difference between the receiving of the continuous data packets at the receiving party and the sending of the continuous data packets at the sending party. The current network jitter situation is the average jitter of the continuous data packets in a current certain period. The larger the jitter, the smaller the trade-off span.
Step 106: and determining a balance span sp according to the current network jitter condition.
Step 107: judging whether the voice interval block with each number needs to be subjected to weighing processing according to the weighing span sp and the interval block number bn, and specifically comprising the following steps:
and determining whether bn% sp is 1 according to the balance span sp and the spacer block number bn.
If yes, the speech interval blocks of each number need to be weighted, and the process proceeds to step 108.
If not, the speech interval blocks of each number do not need to be weighted, and the process proceeds to step 109.
Step 108: and if so, determining the balance value cv according to the public communication traffic characteristic learning result. The method comprises the steps of obtaining the difference between the public traffic and the hidden traffic by detecting the autocorrelation of the current public traffic and the hidden traffic characteristic data, and balancing the distribution difference of the public traffic and the hidden traffic characteristic data in order to reduce the hidden traffic.
Step 109: the trade-off value cv is converted into a corresponding gray value gv according to a gray code.
Step 110: if not, intercepting the secret information with the corresponding length according to the secret information bit number bl embedded in each voice interval block, and converting the secret information with the corresponding length into a corresponding gray value gv according to a gray code.
Step 111: and judging whether the voice interval block value bv is smaller than the gray value gv.
Step 112: if yes, transferring (gv-bv) video packets from the next voice interval block to the current voice interval block for transmission.
Step 113: if not, transferring (bv-gv) video packets from the current voice interval block to the next voice interval block for transmission.
Step 114: it is determined whether all of the secret information has been embedded.
Step 115: if so, covert communication is ended.
If not, the process returns to step 102, and the next speech interval block is entered.
The Gray code has the characteristic that two continuous values are different only by one bit, so the Gray code can relieve noise and packet loss, and the Gray code is adopted to relieve channel noise. The secret message is encoded by a gray code according to the encoding length bl of the secret information bits determined at both ends of the channel. The hidden information bits are encoded into code symbols of a selected length bl, and each spacer block carries information bits of length bl. The coding length bl has some influence on the error rate, since the block size bs will become larger as bl becomes larger. Therefore, the larger bl, the lower the error rate and the stronger the robustness.
The purpose of the voice interval block is to improve the detection resistance and robustness of the constructed hidden channel. The setting of the size of the spaced blocks grouped by voice packet spacing is important. The size bs of the speech spacer block is related to the size of the secret information bit length bl embedded at each time. After the length bl is determined, the capacity of the covert channel is reduced along with the increase of bs, but the video data packets in the voice packet interval are obviously increased along with the increase of the block bs by the covert channel, and meanwhile, in combination with the balance parameter, the characteristic change caused by packet rearrangement is adjusted according to the traffic characteristic balance, so that the rearrangement operation of the video packets is less easy to detect, and meanwhile, the influence of the disorder of the video packets caused by the active attack of an adversary on covert communication is reduced. Therefore, the size of the voice interval block and the balance parameter are adjustable parameters, and the balance can be carried out between the detectability resistance, the robustness and the capacity of a hidden channel.
Fig. 2 is a structural diagram of a packet rearrangement hidden channel construction system oriented to real-time interactive application in the present invention. As shown in fig. 2, a packet rearrangement hidden channel construction system for real-time interactive application includes:
a secret information bit number determining module 201, configured to determine the number bl of secret information embedded in each voice packet interval block.
A video packet number determining module 202, configured to determine the number pn of video packets in the current voice packet interval block.
And the spacer number determining module 203 is configured to number the voice spacer to obtain a spacer number bn.
A voice interval block value determining module 204, configured to determine a voice interval block value bv according to the number of video packets pn and the number of secret information bits bl.
A current network jitter condition obtaining module 205, configured to obtain a current network jitter condition.
A trade-off span determination module 206, configured to determine a trade-off span sp according to the current network jitter situation.
The first determining module 207 is configured to determine whether the speech partition block with each number needs to be weighted according to the weighted span sp and the partition block number bn.
And a trade-off value determining module 208, configured to determine a trade-off value cv according to the public communication traffic characteristic learning result when a trade-off process is required.
A first gray value conversion module 209, configured to convert the trade-off value cv into a corresponding gray value gv according to a gray code.
And a second gray value converting module 210, configured to intercept, when a trade-off process is not required, the secret information with the corresponding length according to the number bl of the secret information embedded in each voice interval block, and convert the secret information with the corresponding length into a corresponding gray value gv according to a gray code.
A second determining module 211, configured to determine whether the speech interval block value bv is smaller than the gray value gv.
A first sending module 212, configured to transfer (gv-bv) video packets from the next voice interval block to the current voice interval block for sending when the voice interval block value bv is smaller than the gray value gv.
A second sending module 213, configured to transfer (bv-gv) video packets from the current speech interval block to the next speech interval block for sending when the speech interval block value bv is greater than or equal to the gray value gv.
A third judging module 214, configured to judge whether all the secret information has been embedded.
An end module 215 for ending the covert communication when all the secret information has been embedded.
And a returning module 216 for returning the "video packet number determining module".
The secret information bit number determining module 201 specifically includes:
and the secret information bit number determining unit is used for determining the secret information bit number bl embedded in each voice packet interval block together through negotiation before covert communication between the sender and the receiver.
The voice interval block value determining module 204 specifically includes:
a voice interval block value determining unit, configured to determine, according to the number of video packets pn and the number of secret information bits bl, a voice interval block value bv using a modulo arithmetic formula bv ═ pn% 2blAnd determining a block value bv of the voice interval block.
The current network jitter condition obtaining module 205 specifically includes:
and the current network jitter condition acquisition unit is used for determining the current network jitter condition according to the delay difference between the receiving of the continuous data packets at the receiving party and the sending of the continuous data packets at the sending party.
The first determining module 207 specifically includes:
and the judging unit is used for determining whether bn% sp is 1 or not according to the balance span sp and the spacer block number bn.
When bn% sp is 1, each numbered speech interval block needs to be weighted.
When bn% sp is not 1, the speech interval blocks of each number do not need to be weighted.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (10)

1. A packet rearrangement hidden channel construction method for real-time interactive application is characterized by comprising the following steps:
determining the number bl of secret information bits embedded in each voice packet interval block;
determining the number pn of video packets in the current voice packet interval block;
numbering the voice spacing blocks to obtain spacing block numbers bn;
determining a voice interval block value bv according to the number pn of the video packets and the number bl of the secret information bits;
acquiring the current network jitter condition;
determining a balance span sp according to the current network jitter condition;
judging whether the voice interval blocks with the numbers need to be subjected to weighing processing or not according to the weighing span sp and the interval block number bn;
if yes, determining a balance value cv according to the public communication traffic characteristic learning result;
converting the trade-off value cv into a corresponding gray value gv according to a gray code;
if not, intercepting the secret information with the corresponding length according to the number bl of the secret information embedded in each voice interval block, and converting the secret information with the corresponding length into a corresponding gray value gv according to a gray code;
judging whether the voice interval block value bv is smaller than the gray value gv;
if yes, transferring (gv-bv) video packets from the next voice interval block to the current voice interval block for transmission;
if not, transferring (bv-gv) video packets from the current voice interval block to the next voice interval block for transmission;
judging whether all secret information is embedded completely;
if yes, the covert communication is ended;
if not, returning to the step of determining the number pn of the video packets in the current voice packet interval block.
2. The method for constructing the packet reordering hidden channel for real-time interactive application according to claim 1, wherein the determining the number bl of the secret information bits embedded in each voice packet interval block specifically comprises:
the sender and the receiver jointly determine the number bl of the secret information embedded in each voice packet interval block through negotiation before covert communication.
3. The method for constructing the packet reordering hidden channel for real-time interactive application according to claim 1, wherein the determining a speech interval block value bv according to the number of the video packets pn and the number of the secret information bits bl specifically comprises:
determining the value bv of the voice interval block by adopting a modulus operation formula bv as pn% 2 according to the number pn of the video packets and the number bl of the secret information bitsblAnd determining a block value bv of the voice interval block.
4. The method for constructing the packet reordering hidden channel for real-time interactive application according to claim 1, wherein the obtaining of the current network jitter specifically comprises:
and determining the current network jitter condition according to the delay difference between the receiving of the continuous data packets at the receiving party and the sending of the continuous data packets at the sending party.
5. The method for constructing the packet reordering hidden channel for real-time interactive application according to claim 1, wherein the determining whether the speech partition block with each number needs to be weighted according to the weighted span sp and the partition block number bn specifically comprises:
determining whether bn% sp is 1 according to the balance span sp and the spacer block number bn;
if yes, the voice interval blocks of all the numbers need to be subjected to weighing processing;
if not, the voice interval blocks of each number do not need to be weighted.
6. A packet rearrangement hidden channel construction system oriented to real-time interactive application is characterized by comprising the following steps:
the secret information bit number determining module is used for determining the secret information bit number bl embedded in each voice packet interval block;
the video packet number determining module is used for determining the number pn of video packets in the current voice packet interval block;
the spacing block number determining module is used for numbering the voice spacing blocks to obtain spacing block numbers bn;
a voice interval block value determining module, configured to determine a voice interval block value bv according to the number pn of the video packets and the number bl of the secret information bits;
the current network jitter condition acquisition module is used for acquiring the current network jitter condition;
a balance span determining module, configured to determine a balance span sp according to the current network jitter condition;
the first judgment module is used for judging whether the voice interval blocks with the numbers need to be subjected to weighing processing according to the weighing span sp and the interval block number bn;
the device comprises a balance value determining module, a balance value determining module and a balance value determining module, wherein the balance value determining module is used for determining a balance value cv according to a public communication traffic characteristic learning result when balance processing is required;
the first gray value conversion module is used for converting the balance value cv into a corresponding gray value gv according to a gray code;
the second gray value conversion module is used for intercepting the secret information with the corresponding length according to the number bl of the secret information embedded in each voice interval block when the weighing processing is not needed, and converting the secret information with the corresponding length into a corresponding gray value gv according to a gray code;
a second judging module, configured to judge whether the speech interval block value bv is smaller than the gray value gv;
a first sending module, configured to transfer (gv-bv) video packets from a next voice interval block to a current voice interval block for sending when the voice interval block value bv is smaller than the gray value gv;
a second sending module, configured to transfer (bv-gv) video packets from a current speech interval block to a next speech interval block for sending when the speech interval block value bv is greater than or equal to the gray value gv;
the third judging module is used for judging whether all the secret information is embedded;
the end module is used for finishing covert communication when all the secret information is embedded;
and the returning module is used for returning the video packet number determining module.
7. The real-time interactive application-oriented packet reordering hidden channel construction system according to claim 6, wherein the secret information bit number determining module specifically comprises:
and the secret information bit number determining unit is used for determining the secret information bit number bl embedded in each voice packet interval block together through negotiation before covert communication between the sender and the receiver.
8. The system for constructing the hidden channel for packet reordering of real-time interactive applications according to claim 6, wherein the module for determining the speech interval block value specifically comprises:
a voice interval block value determining unit, configured to determine, according to the number of video packets pn and the number of secret information bits bl, a voice interval block value bv using a modulo arithmetic formula bv ═ pn% 2blAnd determining a block value bv of the voice interval block.
9. The real-time interactive application-oriented packet rearrangement hidden channel construction system according to claim 6, wherein the current network jitter condition obtaining module specifically includes:
and the current network jitter condition acquisition unit is used for determining the current network jitter condition according to the delay difference between the receiving of the continuous data packets at the receiving party and the sending of the continuous data packets at the sending party.
10. The real-time interactive application-oriented packet rearrangement hidden channel construction system according to claim 6, wherein the first judgment module specifically includes:
a judging unit, configured to determine whether bn% sp is 1 according to the balance span sp and the spacer block number bn;
when bn% sp is 1, the speech spacing blocks of each number need to be weighted;
when bn% sp is not 1, the speech interval blocks of each number do not need to be weighted.
CN202010546822.5A 2020-06-16 2020-06-16 Real-time interactive application-oriented packet rearrangement hidden channel construction method and system Pending CN112073962A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107222309A (en) * 2017-06-29 2017-09-29 常州机电职业技术学院 A kind of hidden channel build method of time type network based on wavelet transform
CN107547196A (en) * 2017-08-29 2018-01-05 中国民航大学 Speech hiding algorithm based on parameters revision

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107222309A (en) * 2017-06-29 2017-09-29 常州机电职业技术学院 A kind of hidden channel build method of time type network based on wavelet transform
CN107547196A (en) * 2017-08-29 2018-01-05 中国民航大学 Speech hiding algorithm based on parameters revision

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
LINHONG GUO 等: "A VoLTE Covert Channel with Intelligent Confrontation", 《JOURNAL OF PHYSICS: CONFERENCE SERIES》 *
XIAOSONG ZHANG 等: "A packet-reordering covert channel over VoLTE voice and video traffics", 《JOURNAL OF NETWORK AND COMPUTER APPLICATIONS》 *

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