CN108875425A - A kind of numerical password input method of anti-camera shooting attack - Google Patents
A kind of numerical password input method of anti-camera shooting attack Download PDFInfo
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- CN108875425A CN108875425A CN201810535074.3A CN201810535074A CN108875425A CN 108875425 A CN108875425 A CN 108875425A CN 201810535074 A CN201810535074 A CN 201810535074A CN 108875425 A CN108875425 A CN 108875425A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/82—Protecting input, output or interconnection devices
- G06F21/83—Protecting input, output or interconnection devices input devices, e.g. keyboards, mice or controllers thereof
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Abstract
The present invention relates to a kind of numerical password input methods of anti-camera shooting attack, belong to information security field.Digital random is divided into two set by this method, and user inputs password by way of the corresponding set of selection.This method has used auxiliary channel on the basis of changing user and inputting the mode of password simultaneously, snugly transmits additional information to user when user inputs password, and the content of confusing user input achievees the purpose that being effective against weak shoulder peeps attack and camera shooting attack.Password entry of the present invention suitable for daily life when mobile payment, mobile device unlock.
Description
Technical field
The invention belongs to information security fields, and in particular to a kind of numerical password input method of anti-camera shooting attack.
Background technique
Password is commonly called as " password ", is a kind of widely applied ID authentication mechanism.Currently, mobile payment, mobile device solution
The scenes such as lock mainly use 4 to 6 numerical passwords to realize authentication.In daily life, user often in public into
The operations such as row mobile payment, mobile device unlock need to input numeric type password and carry out authentication, easily meet in input process
Attack is peeped by shoulder.It is one kind by prying through user password input process that shoulder, which peeps attack, it is intended to steal the attacker of user password
Section.Be generally divided into weak shoulder peep attack and strong shoulder peep attack two kinds, refer to attacker directly with the naked eye from side wherein weak shoulder peeps attack
The password entry process for prying through user steals the attack method of user password by remembering；And strong shoulder peeps attack and refers to attacker
The password entry process of user is used a hidden recorder using picture pick-up device, and subsequent by watching the video used a hidden recorder repeatedly, to divide
The attack method of user's authentic password is precipitated.
Aiming at the problem that input process of numeric type password is susceptible to shoulder and peeps attack, so far, many researchers
Have been designed that various resistance shoulders peep the numeric type password entry scheme of attack, but being mostly used for taking precautions against weak shoulder peeps attack,
And the strong shoulders such as camera shooting attack can not be resisted and peep attack.The password entry method IOC (full name that Roth et al. was proposed in 2004
Immediate Oracle Choices) [V.Roth, K.Richter, R.Freidinger, " A PIN-entry method
Resilient against shoulder surfing ", 2004] it is that most influential anti-shoulder peeps attack password entry mechanism
One of.The number 0 to 9 that can be inputted is randomly divided into two set by IOC password entry method, each each 5 numbers of set, and two
Set is distinguished using black and white.It is black that the number for being divided into black set, which is displayed on the screen background, and font is white,
Background is white when being divided into the number display of white set, and font is black.Gather when input number according to where number, choosing
The key for selecting corresponding color selects four input one-bit digitals.Specific step is as follows for IOC method：
1) number 0 to 9 is randomly divided into black and white two set, each each 5 numbers of set.Screen shows corresponding black and white number
Word keyboard, the number of black set are shown as black matrix wrongly written or mispronounced character, and the number of white set is shown as white gravoply, with black engraved characters.
2) user finds the number to be inputted from the keyboard on screen, if number belongs to black set, selects on screen
Black key；If number belongs to white set, the white key on screen is selected.
3) after user's selection, then step 1) and step 2) are successively carried out.Four selections will be uniquely determined and be inputted
Number, the every progress step 2) of user operate 4 times, will input the one-bit digital in password.
4) password of 4 bit digitals will carry out altogether 16 step 1) and 16 step 2.
Because the short term memory and real-time computing of the mankind are very limited, IOC is highly resistant to weak shoulder and peeps attack.If
Attacker records user password input process using picture pick-up device, reviews video recording repeatedly again later, attacker can still analyze
The correct password of user out, the success rate for imaging attack is 100%.Therefore, IOC can only resist weak shoulder and peep attack, cannot take precautions against
The strong shoulder such as camera shooting attack peeps attack.
Summary of the invention
The present invention provides a kind of digital mouth of anti-camera shooting attack aiming at the problem that IOC method can not resist camera shooting attack
Enable input method.The additional hiding information of user is informed by the Vibration Condition of equipment before user's selection, user combines hidden
Hiding information is inputted, and the hiding information can not all be known by peeping attack or camera shooting attack regardless of the weak shoulder of attacker's progress, thus
It can be reasonably resistant to weak shoulder and peep attack and camera shooting attack.
The object of the invention is to provide a kind of anti-take the photograph to solve the problems, such as that IOC method can not resist camera shooting attack
As the numerical password input method of attack.Present invention uses the vibrating functions of equipment, cannot obtain vibration channel in attacker
In the case where the information of transmitting, hiding information is delivered to user by the Vibration Condition of equipment.User is in conjunction with hiding information
It is inputted, for not knowing that the attacker of hiding information can not only deduce correct password from the input of user, because
And can be reasonably resistant to weak shoulder peep attack and camera shooting shoulder peep attack.The purpose of the present invention is achieved through the following technical solutions.
A kind of numerical password input method of anti-camera shooting attack, which is characterized in that the described method comprises the following steps：
(1) number 0 to 9 is randomly divided into black and white two set, each each 5 numbers of set by system.System display corresponds to
Black and white numeric keypad, the number for belonging to black set is shown as black matrix wrongly written or mispronounced character, and the number for belonging to white set is shown as white background
Surplus.System determines whether equipment is vibrated at random, and the probability of vibration equipment is 50%.No matter whether equipment is vibrated, and equipment all can
Imitative vibration noise is played when showing black and white keyboard.If system determines vibration equipment, equipment can show black and white keyboard and broadcast
Start to vibrate while putting noise, noise playing duration is consistent with the fixation of vibration equipment duration.
(2) whether user's sensing device when seeing new keyboard has vibration.User, which finds from black and white keyboard, to be inputted
Number determines that set where it is black or white.If user does not experience vibration equipment, set where the number is selected
Corresponding key；If user experiences vibration equipment, the set without the number, the i.e. collection opposite with set where number are selected
It closes.If user forgets the Vibration Condition of equipment, put on beating keyboardIt is selected again after the Vibration Condition of key reproducing apparatus.
(3) after user's selection, then step (1) and step (2) are successively carried out.Every the step of carrying out 4 wheel (1) and step (2),
System will uniquely determine user's number to be inputted, and the every progress step (2) of user operates 4 times, will input in password
One-bit digital.Every to have carried out 4 wheel inputs, user begins to next bit digital of input password.
(4) the step of password digit is k, then carries out 4k wheel altogether (1) and step (2).
System decides whether to vibrate at random in the method step (1), if vibration equipment, equipment can show new keyboard
While vibrate, time of vibration immobilizes, such as 300 milliseconds.The faint sound issued when vibration equipment in order to prevent is attacked
Person discovers, no matter equipment show new keyboard after whether vibrate, equipment can all issue the fixed imitative vibration noise of duration and set to cover
It is standby whether to vibrate.Attacker just can not judge whether equipment is vibrated by the faint sound that vibration generates in this way.
The Vibration Condition of user's sensing device when seeing new keyboard in the step (2), while user can hear equipment
The imitative vibration noise issued.If the palm for holding equipment has experienced vibration, illustrate vibration equipment；If palm does not experience vibration
It is dynamic, illustrate that equipment is not vibrated.When user does not notice or forget whether equipment is vibrated, can put on beating keyboard
Key re-starts judgement, and at this moment equipment can replay imitative vibration noise, while reappear the Vibration Condition of equipment just now.
In the step (2), it is assumed that collection where user's number to be inputted is combined into s={ 0,1 }, wherein 0 represents black collection
It closes, 1 represents white set.Vibration equipment situation v={ 0,1 }, wherein 0 represents equipment and do not vibrate, 1 represents vibration equipment.With
The collection of family final choice is combined into c={ 0,1 }, wherein 0 represents black set, 1 represents white set,HereIndicate different
Or operation.Because of probability P (v=0)=P (v=1)=1/2, and conditional probability P (s=0 | c ∈ { 0,1 })=P (s=1 | c ∈
{ 0,1 })=1/2.Attacker has the 1/2 probability user that hits it to input set s where number, and cannot be from the selection c of user
Middle acquisition information, and system then can be bySet where obtaining the number that user to be inputted.Attacker needs to hit it 4 times
Set s where digital, further according to the number in corresponding 4 black and white keyboard upper set s, constantly reducing possible range could be obtained
To correct number, the hit it probability of 4 set s of attacker is 1/24=1/16, and attacker directly guesses that the number is correct
Probability be 1/10, so attacker can not by camera shooting attack improve success attack rate, i.e., attacker can not pass through viewing use
The mode of family input obtains password, can only be merely by conjecture.If password is k, attacker guesses that the successful probability of password is
1/10k.For 4 passwords, attacker guesses that successful probability is 1/10000.Password digit is more, guesses successful probability
It is lower.Attack is peeped for weak shoulder, success attack rate equally drops to the success rate of conjecture password, and the present invention is being effective against camera shooting
It is also further improved while attack and resists the safety that weak shoulder peeps attack.
System constantly reduces the range where input number according to set s where number to be inputted in the step (3),
Because 24> 10, user at most carry out 4 selections, and system just can determine that out user's number to be inputted, so bits per inch word
Require that user selects 4 times.
In the step (3) when user has found that input is wrong, " Del " key on beating keyboard can be put, is deleted defeated
The number entered clicks primary deletion one, and delete operation does not influence the input of Contemporary Digital.
Box in the step (3) above screen shows the password inputted, hidden using symbol "●" or other symbols
Hide specific password.Progress bar is placed below screen, progress bar shows the input progress of Contemporary Digital.Display box and progress bar are convenient
User checks the input progress of password.
In the step (4), password digit k can be 4,6,8, other digits are equally also able to achieve, 4,6,8 mouths
Order is respectively necessary for the step of carry out 16,24,32 is taken turns (1) and step (2) to complete password entry.
It is an object of the invention to solve the problems, such as that IOC password entry method can not resist camera shooting attack, the present invention is proposed
A kind of password entry method of anti-camera shooting attack.Design through the invention, attacker cannot pass through the input of shooting user
Process obtains password, is highly resistant to the camera shooting attack from attacker.
The specific setting environment for the problem of being solved can be in the object of the invention：User in public under movement set
Standby upper input password, attacker by user in the case where not had found using picture pick-up device closely clearly to the input of user
It is shot with the content on device screen.Attacker is in the video recording for playing back shooting later, it is intended to therefrom deduce user just
True password.By the present invention in that transmitting hidden information to user can solve what above-mentioned camera shooting was attacked with the vibrating function of equipment
Problem.
It is opposite with IOC password entry method, it is an advantage of the invention that：
Present invention substantive distinguishing features outstanding and conspicuousness progress are mainly reflected in the following：The present invention uses in equipment
Auxiliary channel, hidden information is transmitted to user by the vibration of equipment when user inputs password, attacker can not be by taking the photograph
As obtaining user password, solve the problems, such as that IOC method can not resist camera shooting attack；Attack is equally increased using auxiliary channel
The weak shoulder of person peeps the difficulty of attack, further improves and resists the safety that weak shoulder peeps attack.
The purpose of the present invention, advantage and feature will be explained by the non-limitative illustration of preferred embodiment below.This
A little embodiments are only the prominent example using technical solution of the present invention, all skills taking equivalent replacement or equivalent transformation and being formed
Art scheme, all falls within the scope of protection of present invention.
Detailed description of the invention
The invention will be further described with reference to the accompanying drawings and embodiments：
Fig. 1 is keyboard schematic diagram of the invention
Fig. 2 is password entry method flow diagram of the invention
Specific embodiment
Above scheme is described further below in conjunction with specific embodiment.It should be understood that these embodiments are for illustrating
The present invention and be not limited to limit the scope of the invention.Based on the embodiment of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, belongs to protection scope of the present invention.
Fig. 1 illustrates keyboard schematic diagram of the invention, and keyboard includes：
Password display box shows the password inputted；
0 to 9 black and white keyboard, 0 to 9 number of display are respectively gathered at place；
" Del " key, for deleting the password inputted；
Key for reappearing the Vibration Condition of equipment just now, while playing imitative vibration noise；
" Black " key and " White " key, for black set and white set；
Progress bar shows the input progress of Contemporary Digital, and up to 4 take turns, i.e., 4/4.
The numerical password input method implementation steps of the anti-camera shooting attack of the present embodiment are as follows：
Step 1：Number 0 to 9 is randomly divided into black and white two set, each each 5 numbers of set by system.System is shown
Corresponding black and white numeric keypad, the number for belonging to black set are shown as black matrix wrongly written or mispronounced character, and the number for belonging to white set is shown as
White gravoply, with black engraved characters.System determines whether equipment is vibrated at random, and the probability of vibration equipment is 50%.No matter whether equipment is vibrated, equipment
Imitative vibration noise will be played when showing black and white keyboard.If system determines vibration equipment, equipment can be in display black and white keyboard
Start to vibrate with while playing noise, noise playing duration is consistent with the fixation of vibration equipment duration.
Step 2：Whether user's sensing device when seeing new keyboard has vibration.User finds from black and white keyboard wants defeated
The number entered, the set where determining it is black or white, if user does not experience vibration equipment, selects the number institute
Gathering corresponding key；If user experiences vibration equipment, the set without the number is selected, i.e., gathers phase with number place
Anti- set.Referring to Fig. 1, the number to input is 1, if vibration equipment, user selects " Black " key；If equipment is not shaken
Dynamic, user selects " White " key.If user forgets the Vibration Condition of equipment, put on beating keyboardThe vibration of key reproducing apparatus
Emotionally selected again after condition.After selection, the progress bar between " Black " key and " White " key changes, on progress bar
Text progress can also change, and prompt the input progress of user's Contemporary Digital.
Step 3：After user's selection, then successively carry out step 1 and step 2.Every the step of carrying out 4 wheel one and step 2,
System will uniquely determine user's number to be inputted, and the every progress step 2 of user operates 4 times, will input one in password
Bit digital, the number inputted are shown in the password display box above keyboard.Every to have carried out 4 wheel inputs, user begins to defeated
Enter next bit digital of password.If user has found that input is wrong, re-entered after using " Del " key to delete.
Step 4：The step of password digit is k, then carries out 4k wheel altogether one and step 2.
In conjunction with Fig. 2, the numerical password input method specific implementation step of anti-camera shooting attack is as follows：
Step 1：System counts the wheel number t of password entry, and initial t is 0.
Step 2：Number 0 to 9 is randomly divided into black and white two set, each each 5 numbers of set by system.System is random
Determine whether equipment is vibrated, Vibration Condition v, the probability of vibration equipment is 50%.
Step 3：System shows corresponding black and white numeric keypad, and the number for belonging to black set is shown as black matrix wrongly written or mispronounced character, belongs to
White gravoply, with black engraved characters is shown as in the number of white set.No matter whether equipment is vibrated, and equipment can all be played when showing black and white keyboard
Imitative vibration noise.If system determines vibration equipment, equipment can start to vibrate while showing black and white keyboard and playing noise,
Noise playing duration is consistent with the fixation of vibration equipment duration.
Step 4：User notices whether palm experiences vibration equipment when seeing new keyboard.
Step 5：User finds the number to be inputted from black and white keyboard, determines that set s where it is black or white
Color.If user does not experience vibration equipment, select to gather corresponding key where the number；If user experiences equipment vibration
It is dynamic, select the set without the number, the i.e. set opposite with set where number.SelectIf user forgets to set
Standby Vibration Condition is put on beating keyboardIt is selected again after the Vibration Condition of key reproducing apparatus.
Step 6：After user's selection, wheel number t increases by 1 time.System byCollection where obtaining the number that user to be inputted
S is closed, digital location is reduced.Every the step of carrying out 4 wheel one and step 2, system will uniquely determine what user to be inputted
Number.
Step 7：System judge user input specific one-bit digital wheel number t whether up to 4 wheel, if having carried out 4 wheels,
The then number that system confirmation user is inputted；If not carrying out 4 wheels also, system carries out step 2.
Step 8：The step of password digit is k, then carries out 4k wheel altogether one and step 2.System judges whether to take turns number t
It is taken turns up to 4k, if having reached 4k wheel, illustrates that k passwords have been finished in user, judge whether the order of user's institute's outlet is correct password；If also not
4k wheel illustrates that user does not input whole passwords also, and system carries out step 2, prepares the input of next bit digital in password.
It is below the input used time of password entry method.
The software of IOC method and anti-camera shooting attack password entry method, 10 users are realized in installation in Android phone
It is logged in using software registration.Experimental record user is inputted when being logged in using IOC method and anti-camera shooting attack password entry method
Used time, every user have attempted 4 to both the above method, and the login of 6 and 8 passwords, the password of isotopic number is not tasted respectively
Examination 12 times.
IOC method and the password entry method of anti-camera shooting attack input average used time, experimental result such as table 1：
1 IOC method of table and the password entry method of anti-camera shooting attack input average used time comparison
As can be seen from the table, IOC method is compared, the numerical password input method input used time of anti-camera shooting attack is longer,
This is because user needs to adjust the selection of oneself according to the Vibration Condition of equipment in the process of input.It resists shoulder and peeps attack
All there is always trade-off relationship in safety and availability in password entry scheme, sacrificial in the case where greatly improving safety
Domestic animal part availability is acceptable.
The present invention relates to a kind of numerical password input methods of anti-camera shooting attack.This method is changing user's input password
Auxiliary channel has been used on the basis of mode, can snugly transmit additional information to user when user inputs password, have
Effect resists weak shoulder and peeps attack and camera shooting attack.Mouth of the present invention suitable for daily life when mobile payment, mobile device unlock
Enable input.
Claims (7)
1. a kind of numerical password input method of anti-camera shooting attack, which is characterized in that the described method comprises the following steps：
(1) number 0 to 9 is randomly divided into black and white two set, each each 5 numbers of set by system.System shows corresponding black
White numeric keypad, the number for belonging to black set are shown as black matrix wrongly written or mispronounced character, and the number for belonging to white set is shown as white gravoply, with black engraved characters.
System can determine at random whether equipment is vibrated.No matter whether equipment is vibrated, and equipment can all play imitative vibration when showing black and white keyboard
Moving noise.If system determines vibration equipment, equipment can start to vibrate while showing black and white keyboard and playing noise, noise
Playing duration is consistent with the fixation of vibration equipment duration.
(2) whether user's sensing device has vibration.User finds the number to be inputted from black and white keyboard, determines set where it
It is black or white.If user does not experience vibration equipment, select to gather corresponding key where the number；If user feels
By vibration equipment, the set without the number, the i.e. set opposite with set where number are selected.
(3) after user's selection, then step (1) and step (2) are successively carried out.Every the step of carrying out 4 wheel (1) and step (2), system
User's number to be inputted will be uniquely determined, the every progress step (2) of user operates 4 times, will input one in password
Number, every to have carried out 4 wheel inputs, user begins to next bit digital in input password.
(4) the step of password digit is k, then carries out 4k wheel altogether (1) and step (2).
2. the numerical password input method of anti-camera shooting attack according to claim 1, which is characterized in that
System decides whether to vibrate at random, and vibration probability is 50%.If vibration equipment, equipment can be while showing new keyboard
Vibration, time of vibration immobilize, and such as 300 milliseconds.The faint sound issued when vibration equipment in order to prevent is discovered by attacker,
No matter equipment show new keyboard after whether vibrate, equipment can all issue the fixed imitative vibration noise of duration and come whether Cloaked device shakes
It is dynamic.
3. the numerical password input method of anti-camera shooting attack according to claim 1, which is characterized in that
The Vibration Condition of user's sensing device when seeing new keyboard, while user can hear the imitative vibration noise that equipment issues.
If the palm for holding equipment has experienced vibration, illustrate vibration equipment；If palm does not experience vibration, illustrate that equipment is not shaken
It is dynamic.
4. the numerical password input method of anti-camera shooting attack according to claim 1, which is characterized in that
When user does not notice or forget whether equipment is vibrated, can put on beating keyboardKey is experienced again, at this moment sets
It is standby to replay imitative vibration noise, while reappearing the Vibration Condition of equipment just now.
5. the numerical password input method of anti-camera shooting attack according to claim 1, which is characterized in that
When user has found that input is wrong, " Del " key on beating keyboard can be put, deletes the number inputted, is clicked primary
One is deleted, delete operation does not influence the input of Contemporary Digital.
6. the numerical password input method of anti-camera shooting attack according to claim 1, which is characterized in that
Box above screen shows the password inputted, hides specific password using symbol "●" or other symbols.Under screen
Progress bar is placed by side, and progress bar shows the input progress of Contemporary Digital.Display box and progress bar facilitate user to check the defeated of password
Enter progress.
7. the numerical password input method of anti-camera shooting attack according to claim 1, which is characterized in that
Password digit k can be 4,6,8, other digits are equally also able to achieve, and 4,6,8 passwords are respectively necessary for carry out 16,
The step of 24,32 wheel (1) and step (2) complete password entry.
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| CN201810535074.3A CN108875425A (en) | 2018-05-25 | 2018-05-25 | A kind of numerical password input method of anti-camera shooting attack |
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| CN201810535074.3A CN108875425A (en) | 2018-05-25 | 2018-05-25 | A kind of numerical password input method of anti-camera shooting attack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110222490A (en) * | 2019-06-11 | 2019-09-10 | Oppo（重庆）智能科技有限公司 | Unlocking method, tripper, terminal device and computer readable storage medium |
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| CN104468979A (en) * | 2014-11-06 | 2015-03-25 | 中国科学院信息工程研究所 | Number password input method resistant to peeping and attacking based on voice prompt |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110222490A (en) * | 2019-06-11 | 2019-09-10 | Oppo（重庆）智能科技有限公司 | Unlocking method, tripper, terminal device and computer readable storage medium |
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Application publication date: 20181123 |