CN106874245A - A kind of online competition platform dynamic Flag processing method and processing devices of CTF - Google Patents
A kind of online competition platform dynamic Flag processing method and processing devices of CTF Download PDFInfo
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- A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
- A63F13/00—Video games, i.e. games using an electronically generated display having two or more dimensions
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- A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
- A63F2300/00—Features of games using an electronically generated display having two or more dimensions, e.g. on a television screen, showing representations related to the game
- A63F2300/50—Features of games using an electronically generated display having two or more dimensions, e.g. on a television screen, showing representations related to the game characterized by details of game servers
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Abstract
The invention discloses a kind of online competition platform dynamic Flag processing method and processing devices of CTF, the method includes：When the request of user's access exercise question is received, generate dynamic Flag and simultaneously preserve, it is different that different user accesses the dynamic Flag generated when same exercise question and the same user different exercise questions of access；The information in original exercise question is replaced with the dynamic Flag of generation, new exercise question is generated and is returned to user；When the Flag of user's submission is received, it is contrasted with the Flag for being preserved, judged whether user submits to correct.Compared with prior art, the logical behavior that can effectively reduce player's interaction Flag, obtain other people Flag of the present invention, player is allowed to focus more on exercise question in itself, abandon being obtained from other non-approach of solving a problem the illusion of Flag, and player's cheating that may be present can also be further discovered that, be operated in order to being alerted cheating player, being shielded, decontroled etc..
Description
Technical field
The present invention relates to a kind of online competition platform dynamic Flag processing method and processing devices of CTF, belong to the information processing technology
Field.
Background technology
The general translations of CTF (Capture The Flag) Chinese take flag match by force, are a kind of popular information security contest forms.
Its substantially flow is that, by carrying out the forms such as Attack Defence, program analysis between competition team, take the lead in the ratio be given from sponsor
The character strings or other guide a string with certain format are obtained in match environment, and sponsor is submitted to, so as to win point
Number.Call for convenience, we are referred to as such content " Flag ".CTF competition models mainly have three classes, pattern of solving a problem,
Attacking and defending pattern and mixed mode.
First, pattern of solving a problem (Jeopardy)
In pattern CTF match rules of solving a problem, team participating in the contest can be participated in by internet or field network, this pattern
CTF contests and ACM programming contests, informatics Olympic Competition than relatively similar, with solve network security technology challenge exercise question score value and when
Between carry out ranking, be often used in line selective trial.Exercise question mainly comprising reverse, bug excavation and utilization, Web infiltrations, password, take
The classifications such as card, steganography, safe programming.
2nd, attacking and defending pattern (Attack-Defense)
In attacking and defending pattern CTF match rules, team participating in the contest is attacked mutually and is defended in cyberspace, excavates network service
Leak simultaneously attacks opponent's service and carrys out score, and repairing own services leak is on the defensive to avoid losing scores.Attacking and defending pattern CTF match rules can
To reflect playing conditions by score in real time, finally also directly decided the winner with score, be a kind of dog-eat-dog, with very strong
The network security match rule of sight and heigh clarity.In this match rule, not exclusively than the intelligence and technology of player,
Also than muscle power (because match it is general can all continue 48 hours and more than), while also coordinating and cooperation than the division of labor between team.
3rd, mixed mode (Mix)
The CTF match rules of the pattern of solving a problem and attacking and defending pattern are combined, such as at the beginning of team participating in the contest can obtain some by solving a problem
Beginning fraction, then carries out the zero-sum game of score increase and decrease by Attack Defence, is finally decided the winner with score height.
Wherein the pattern of solving a problem is generally online contest, and the various online competition platforms of CTF arise at the historic moment, and existing CTF is competing online
Match platform need in advance be disposed exercise question environment, be recorded item content using exercise question, platform loose coupling mechanism, the exercise question of demand environment,
Guiding user to access existing content and environment using the online competition platforms of CTF in play carries out answer.This mode mainly has
Individual drawback is exercise question Flag unique, and exercise question text/annex/environment is shared by all troops, and Flag is unique, team participating in the contest/people
Other people Flag can be obtained by the non-means of solving a problem to submit to, platform cannot judge Flag acquiring way, also cannot be by Flag areas
Divide acquiring way.
The content of the invention
Goal of the invention：For problems of the prior art, the present invention provides a kind of online competition platform dynamics of CTF
Flag processing method and processing devices, effectively prevention contestant's cheating.
Technical scheme：For achieving the above object, the present invention is adopted the following technical scheme that：
A kind of online competition platform dynamic Flag processing methods of CTF, comprise the following steps：
(1) when the request of user's access exercise question is received, generate dynamic Flag and simultaneously preserve, different user accesses same topic
It is different that mesh and same user access the dynamic Flag generated during different exercise questions；
(2) the dynamic Flag generated with step (1) replaces the information in original exercise question, generates new exercise question and returns to use
Family；
(3) when the Flag of user's submission is received, it is contrasted with the Flag for being preserved, is judged what user submitted to
It is whether correct.
During the entitled textual description class exercise question, the text in original exercise question is replaced with dynamic Flag in the step (2)
This, dynamic new exercise question text of the generation comprising dynamic Flag.
When the entitled annex downloads class exercise question, changed in original exercise question according to dynamic Flag in the step (2)
Hold, generate new file and the download address of new file is returned into user；If after the annex downloads the entitled compiling of class
Executable file, then change the content of respective code file according to dynamic Flag, recompilates the new executable file of generation, and
Download address is returned into user.
Preferably, when the file that need to be downloaded is multiple file, after multiple files are packed and by the download of compressed package
Address returns to user.
During the entitled online environmental classes exercise question, in the step (2) by before environment generation by dynamic Flag
Write-in initializtion script is realized being injected into Flag in thread environment.
Preferably, the initializtion script in thread environment includes Flag injection scripts, first according to dynamic in step (2)
Flag changes Flag injection script contents, generates new Flag injection scripts, or dynamic Flag is passed into Flag as parameter
Injection script, recalling environment deployment program carries out online environment deployment, and the online environment access address disposed is returned into use
Family.
Preferably, dynamic Flag is the character string of the certain length for randomly generating in the step (1), or using right
User profile, topic information and timestamp carry out the character string that irreversible encryption algorithm is obtained.
Preferably, the step (3) if in user submit to Flag it is incorrect, also judge whether user practises fraud, if with
That family is submitted to is the Flag of other users, then it is assumed that there is cheating between two users.
A kind of device based on the above-mentioned online competition platform dynamic Flag processing methods of CTF, including：User's request and sound
Answer module, dynamic Flag modules, question generation module, and authentication module；
The user's request and respond module, the request of exercise question is accessed for receiving user, and the exercise question that dynamic is generated
Return to user；
The dynamic Flag modules, for generating and preserve dynamic Flag；
Question generation module, the Flag for receiving dynamic Flag modules generation, and it is dynamic according to the dynamic Flag for receiving
State generates corresponding exercise question；
The authentication module, dynamic Flag and the Flag for being preserved for user to be submitted to are contrasted, and judge user
Whether whether that submits to is correct and practise fraud.
The question generation module includes：
Textual description class exercise question generation unit, for receiving dynamic Flag, and dynamically generation is new comprising dynamic Flag
Exercise question text；
Annex downloads class exercise question generation unit, for receiving dynamic Flag, and changes original exercise question according to dynamic Flag
Content, generates new file and the download address of new file is returned into user；
And online environmental classes exercise question generation unit, for receiving dynamic Flag, and write initially by by dynamic Flag
Change script so as to realize being injected into Flag in thread environment.
Beneficial effect：Compared with prior art, the present invention is each team/individual dynamically different bags of generation by dynamic Flag
Exercise question containing different Flag, can effectively reduce team member's interaction Flag, obtain the behavior of other people Flag, allow player to be more absorbed in
In exercise question in itself, abandon being obtained from other non-approach of solving a problem the illusion of Flag, and can also be further discovered that player there may be
Cheating, operated in order to being alerted cheating player, being shielded, decontroled etc..
Brief description of the drawings
Fig. 1 is the method flow diagram of the embodiment of the present invention.
Fig. 2 is the apparatus structure schematic diagram of the embodiment of the present invention.
Specific embodiment
With reference to specific embodiment, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention, after the present invention has been read, those skilled in the art are to various equivalences of the invention
The modification of form falls within the application appended claims limited range.
As shown in figure 1, a kind of online competition platform dynamic Flag processing methods of CTF disclosed in the embodiment of the present invention, mainly
Comprising dynamic Flag generation, dynamic Flag distribution and user submission Flag three key mechanisms of dynamic authentication, specifically include as
Lower step：
Step (1), receive user access exercise question request when, generation dynamic Flag simultaneously preserve, different user access
It is different that same exercise question and same user access the dynamic Flag generated during different exercise questions.In this step, user accesses exercise question
When, the Flag of the user exercise question is specific to by XCTF training platforms unification generation one and is stored in database, the dynamic
Flag can be the character string of the certain length for randomly generating, or be obtained using AES according to user and exercise question relevant information
Arrive, more preferred method is that the combining characters string of selection ID, exercise question ID and timestamp is irreversible by MD5, SHA1 etc.
AES is obtained.Flag is distributed to exercise question after platform unification generation dynamic Flag.
Step (2), the dynamic Flag generated with step (1) replace the information in original exercise question, generate new exercise question and return
To user.In this step, after each specific exercise question receives the dynamic Flag of distribution, new Flag is just injected into original exercise question
In template, the specific method for implanting textual description class common for CTF, annex download class, online environmental classes variety classes exercise question
Slightly different for the implementation that type is taken, specific as follows：
A. textual description class exercise question
After generation exercise question process receives the Flag of platform distribution, original exercise question text is read, new Flag is updated to text
In this, dynamic text of the generation comprising dynamic Flag returns to user.The new exercise question text of generation can be stored in database, then
The text can be directly returned during secondary access exercise question.
B. annex downloads class exercise question
After generation exercise question process receives the Flag of platform distribution, loading needs to update the original problem file of Flag, according to
Dynamic Flag changes the content of original exercise question, generates new file and the download address of new file is returned into user.For needing
To pass through the executable file (exercise question that such as c language is write) of compiling, the content of respective code file is changed according to dynamic Flag, repair
The new executable file of generation is recompilated after changing, modification exercise question code is directed to the topic of some needs compiling.Can also be by
The download address of compressed package is returned into user after needing one or more files downloaded packing.The new download of dynamic generation
The address of file can be also stored in database, and the accessory address of preservation can be directly returned when accessing exercise question again.
C. online environmental classes exercise question
For the exercise question of online environmental classes, will by the way that dynamic Flag is write into initializtion script realization before environment generation
Flag is injected into thread environment.After generation exercise question process receives the Flag of platform distribution, Flag is first changed according to dynamic Flag
Injection script content, generates new Flag injection scripts, or passes to Flag injection scripts using dynamic Flag as parameter, then adjusts
Online environment deployment is carried out with environment deployment program, environment can run installation exercise question script when disposing, call dynamic Flag to note
Enter script, go the Flag values of change system.Online environment access address is returned to user by environment after disposing.Do not returned in environment
Corresponding address can be preserved during receipts in database, it is all same environment that user repeatedly accesses, can be clear while environment is reclaimed
Relevant information in reason database, user applies for the exercise question again after environment is reclaimed, and can regenerate new a Flag and environment.
Step (3), when the Flag of user's submission is received, by it with database in the Flag that is preserved contrasted,
Judge that whether user submits to correct, if the Flag that user submits to is incorrect, can also determine whether whether user practises fraud, if with
That family is submitted to is the Flag of other users, then it is assumed that there is cheating between two users.
As shown in Fig. 2 a kind of based on the above-mentioned online competition platform dynamic Flag treatment of CTF disclosed in the embodiment of the present invention
The device of method, including：User's request and respond module, dynamic Flag modules, question generation module, and authentication module.Its
Middle user's request and respond module, the request of exercise question are accessed for receiving user, and the exercise question of dynamic generation is returned into user；
Dynamic Flag modules, for generating dynamic Flag, and dynamic Flag are preserved to database；Question generation module, for receiving
The Flag of dynamic Flag modules generation, and corresponding exercise question is dynamically generated according to the dynamic Flag for receiving；Authentication module, is used for
The dynamic Flag and Flag for being preserved that user submits to is contrasted, is judged whether whether user's submission is correct and practises fraud.
Wherein question generation module includes：Textual description class exercise question generation unit, for receiving dynamic Flag, and dynamically gives birth to
Into the new exercise question text comprising dynamic Flag；Annex downloads class exercise question generation unit, for receiving dynamic Flag, and according to dynamic
State Flag changes the content of original exercise question, generates new file and the download address of new file is returned into user；And it is online
Environmental classes exercise question generation unit, for receiving dynamic Flag, and by by dynamic Flag write initializtion script so as to realize by
Flag is injected into thread environment.
In real racetrack, we can first dispose exercise question and corresponding dynamic Flag receives program, in play
The exercise question of each team/individual is dynamically generated when user accesses exercise question environment according to the different different schemes more than of topic types
Environment.Player obtains the Flag of other users/troop by the non-approach of solving a problem in answer process kind, and submits to system, is
System can Intelligent Recognition go out cheating user, for cheating user, platform can be given tacit consent to the user and will be supplied to the user Flag
Two users mask, and give and alert, at the same will record player answer record, can cancel in the case where sponsor permits
The shielding of the user of the user and offer Flag.
Claims (10)
1. online competition platform dynamic Flag processing methods of a kind of CTF, it is characterised in that comprise the following steps：
（1）When receiving user and accessing the request of exercise question, generation dynamic Flag is simultaneously preserved, the different user same exercise question of access with
And same user to access the dynamic Flag generated during different exercise questions different；
（2）Use step（1）The dynamic Flag of generation replaces the information in original exercise question, generates new exercise question and returns to user；
（3）When the Flag of user's submission is received, it is contrasted with the Flag for being preserved, whether judged user's submission
Correctly.
2. online competition platform dynamic Flag processing methods of a kind of CTF according to claim 1, it is characterised in that described
During entitled textual description class exercise question, the step（2）The middle text replaced with dynamic Flag in original exercise question, dynamic generation bag
New exercise question text containing dynamic Flag.
3. online competition platform dynamic Flag processing methods of a kind of CTF according to claim 1, it is characterised in that described
When entitled annex downloads class exercise question, the step（2）The middle content that original exercise question is changed according to dynamic Flag, generates new text
The download address of new file is simultaneously returned to user by part；If the annex downloads the executable file after the entitled compiling of class,
The content of respective code file is changed according to dynamic Flag, the new executable file of generation is recompilated, and download address is returned
Back to user.
4. online competition platform dynamic Flag processing methods of a kind of CTF according to claim 3, it is characterised in that when needing
When the file of download is multiple files, user is returned to after multiple files are packed and by the download address of compressed package.
5. online competition platform dynamic Flag processing methods of a kind of CTF according to claim 1, it is characterised in that described
During entitled online environmental classes exercise question, the step（2）In by before environment generation by dynamic Flag write initialization pin
Be injected into Flag in thread environment by this realization.
6. online competition platform dynamic Flag processing methods of a kind of CTF according to claim 5, it is characterised in that online
The initializtion script of environment includes Flag injection scripts, step（2）Middle elder generation is changed in Flag injection scripts according to dynamic Flag
Hold, generate new Flag injection scripts, or Flag injection scripts are passed to using dynamic Flag as parameter, recall environment deployment
Program carries out online environment deployment, and the online environment access address disposed is returned into user.
7. online competition platform dynamic Flag processing methods of a kind of CTF according to claim 1, it is characterised in that described
Step（1）Middle dynamic Flag is the character string of the certain length for randomly generating, or using to user profile, topic information and when
Between stamp carry out the character string that irreversible encryption algorithm is obtained.
8. online competition platform dynamic Flag processing methods of a kind of CTF according to claim 1, it is characterised in that described
Step（3）If in user submit to Flag it is incorrect, also judge whether user practises fraud, if user submission be other users
Flag, then it is assumed that there is cheating between two users.
9. a kind of device of the online competition platform dynamic Flag processing methods of CTF based on described in claim 1-8, its feature exists
In, including：User's request and respond module, dynamic Flag modules, question generation module, and authentication module；
The user's request and respond module, the request of exercise question are accessed for receiving user, and the exercise question of dynamic generation is returned
To user；
The dynamic Flag modules, for generating and preserve dynamic Flag；
Question generation module, the Flag for receiving dynamic Flag modules generation, and it is dynamically raw according to the dynamic Flag for receiving
Into corresponding exercise question；
The authentication module, Flag and the dynamic Flag for being preserved for user to be submitted to are contrasted, and judge that user submits to
It is whether correct and whether practise fraud.
10. online competition platform dynamic Flag processing units of a kind of CTF according to claim 9, it is characterised in that described
Question generation module includes：
Textual description class exercise question generation unit, for receiving dynamic Flag, and dynamically new exercise question of the generation comprising dynamic Flag
Text；
Annex downloads class exercise question generation unit, for receiving dynamic Flag, and according to the content of the dynamic Flag original exercise questions of modification,
The download address of new file is simultaneously returned to user by the new file of generation；
And online environmental classes exercise question generation unit, for receiving dynamic Flag, and initialization pin is write by by dynamic Flag
This is so as to realize being injected into Flag in thread environment.
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Cited By (18)
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|---|---|---|---|---|
| CN107596689A (en) * | 2017-09-07 | 2018-01-19 | 广州华多网络科技有限公司 | A kind of question and answer mode interaction control method, apparatus and system |
| CN108786115A (en) * | 2018-05-03 | 2018-11-13 | 南京赛宁信息技术有限公司 | The method and system of CTF dynamics Flag are generated based on Transparent Proxy |
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| CN109543933A (en) * | 2018-10-08 | 2019-03-29 | 中国科学院信息工程研究所 | A kind of net peace personnel technical ability evaluation system |
| CN109685347A (en) * | 2018-12-14 | 2019-04-26 | 西安四叶草信息技术有限公司 | Attacking and defending assessment method and device |
| CN109714321A (en) * | 2018-12-14 | 2019-05-03 | 西安四叶草信息技术有限公司 | Dynamic flag processing method and processing device |
| CN111198683A (en) * | 2019-12-26 | 2020-05-26 | 曙光信息产业(北京)有限公司 | Internet platform |
| CN111209089A (en) * | 2020-02-28 | 2020-05-29 | 杭州师范大学 | CTF competition online environment type topic safety deployment method based on Docker container |
| CN111209089B (en) * | 2020-02-28 | 2023-08-22 | 杭州师范大学 | CTF competition online environment class title safety deployment method |
| CN111756746A (en) * | 2020-06-24 | 2020-10-09 | 国家计算机网络与信息安全管理中心 | Network attack and defense competition dynamic Flag anti-cheating application method |
| CN111881157A (en) * | 2020-07-29 | 2020-11-03 | 光通天下网络科技股份有限公司 | Network target range cheating behavior detection method and device and electronic equipment |
| CN112885175A (en) * | 2021-01-15 | 2021-06-01 | 杭州安恒信息安全技术有限公司 | Information security question generation method and device, electronic device and storage medium |
| CN113342479A (en) * | 2021-08-09 | 2021-09-03 | 南京赛宁信息技术有限公司 | Competition platform dynamic Flag injection method and system based on file system |
| CN113342479B (en) * | 2021-08-09 | 2021-11-26 | 南京赛宁信息技术有限公司 | Competition platform dynamic Flag injection method and system based on file system |
| CN116070115A (en) * | 2023-01-05 | 2023-05-05 | 北京永信至诚科技股份有限公司 | Cheating determination method and device in network attack and defense competition |
| CN116248411A (en) * | 2023-03-21 | 2023-06-09 | 广西塔易信息技术有限公司 | AWD attacks and defends platform |
| CN116248411B (en) * | 2023-03-21 | 2024-02-23 | 广西塔易信息技术有限公司 | AWD attacks and defends platform |
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