WO2015049055A1

WO2015049055A1 - Method of displaying an item of information

Info

Publication number: WO2015049055A1
Application number: PCT/EP2014/002686
Authority: WO
Inventors: Martin Auer; Dinh Chi TOMAS; Maximilian LOY
Original assignee: Giesecke & Devrient Gmbh
Priority date: 2013-10-04
Filing date: 2014-10-02
Publication date: 2015-04-09
Also published as: DE102013016640A1

Abstract

The invention concerns a method of displaying an item of information on a display arrangement. According to the invention, a first item of image information (10) and a second item of image information (20) are superimposed on the display arrangement (40) in such a way that the information to be displayed is displayed only when a relative movement occurs between the first (10) and the second (20) item of image information.

Description

Method for presenting information

Technical area

The present invention relates to a method for displaying information on a display device. When presenting

Information on a display device, such as a display of a mobile device, a tablet PC and / or a

Computers, it may happen that a malicious program, such as a Trojan, reads the screen contents and misuses the information presented. In this way, third parties can unjustifiably gain access to sensitive data.

State of the art

Various methods are known for displaying information securely on a display device.

From DE 10 2007 043 843 AI, the laying on of a display card on a PC display shows to represent a number field with random number arrangement. The user can enter his PIN as he places the display card on the PC display. Before placing the display card on the PC display, the user can not recognize the arrangement of the numbers on the numeric keypad.

Furthermore, films are known which can be placed or glued onto a display device and allow the viewing of the display device only at a certain angle. These films are used, for example, at ATMs. This way you can avoid that a person standing sideways beside the ATM can see what is displayed on the ATM screen.

However, the application of a film to a display device has the disadvantage that a malware (Trojan) unnoticed can read the information displayed on the display device and can pass this on to third parties. In this way, third parties can gain unauthorized access to sensitive data.

Presentation of the invention

The invention has for its object to provide a method for presenting information on a display device, which solves the known problems of the prior art and is further adapted to a confidential information securely on a

Display device.

The object is achieved by a method according to

independent claim 1. Advantageous embodiments of

inventive method will become apparent from the dependent claims.

The present invention is based on the idea to use the moiré effect skillfully to provide information on a

Display device to be displayed so that a read by a

Malware is prevented.

Accordingly, the inventive method for presenting information on a display device comprises displaying a first

Image information on the display device, overlaying the first Image information on the display device with a second

Image information on the display device, wherein the second

Picture information contains the information to be displayed and wherein the second image information is formed such that it is not recognizable in a static superposition of the two image information, and generating a relative movement between the first and the second image information on the display device, so that at least during the relative Movement the information to be displayed for a viewer of the display device is visible.

For the purposes of the invention, the feature according to which the second image information is designed in such a way that it is not recognizable in the case of a static overlay is understood to be a scenario in which the two image information items are displayed one above the other, the second image information being color-coordinated. that it corresponds approximately to the color tone of the first image information. Thus, the patterns in an overlay coincide approximately so that the information to be displayed is not recognizable.

With the method according to the invention, it is particularly advantageously possible to display information on a display device such that it can be recognized only with difficulty by third parties. Because the information is only recognizable while a relative movement between the first and the second image information takes place. During the presentation of the

Information is the moire effect exploited. According to the moiré effect, information can be displayed when superimposing grids.

The inventive method also has the advantage that a Trojan, which a static recording of the on the display device shown content, the recording can not use meaningful because the information to be displayed is recognizable only during the relative movement. In this way, the security in the presentation of the information can be further increased.

The first image information may essentially represent image noise, in which a plurality of, for example, white, gray and black pixels are displayed randomly distributed. A use of colored pixels is also possible. Here, the term "substantially" is used to clarify that the first image information, in addition to the image noise, may also comprise other components which, however, are incapable of giving an indication of the information to be presented the step of overlaying the second image information before and / or after the first

Picture information shown that a part of the image components of the first image information is superimposed by the image components of the second image information and / or that a part of the image components of the second image information is superimposed by the image components of the first image information. In this way, it can be advantageously ensured that in the case of static superimposition the information to be displayed is not recognizable or can not sufficiently come to the fore in order to be perceived by a viewer of the display device. Only by generating the relative movement can the information be made "visible". If the second image information behind the first

Image information is displayed, the first image information is at least partially transparent perform, so that the second image information during the relative movement through the first image information is recognizable.

According to a further preferred embodiment of the invention, when the relative movement is generated, individual components of the second and / or the first image information are moved in different directions. It is sufficient to do a relatively small movement. In this way, the security in presenting the information can be further increased.

The information to be displayed can be, for example, a password,

in particular a one-time password (OTP)

CAPTCHA or a number field on which the individual numbers are arranged in a random manner.

The security in the representation of the information can be further increased if the relative movement is only generated while the

Viewer performs a specific action. An action may be, for example, touching the display or moving the finger over the display. In this way, it is advantageously ensured that the information to be displayed is only displayed if the viewer or the user so desires. A presentation of the information in a period of time, while the user of the no

Attention, is thus advantageously avoided. Instead of that

Finger can also be used another input means, as long as the display device detects the movement.

The relative movement may, according to one embodiment, be considered a

repeated reciprocal movement of the first and / or the second Bildinf ormation be formed. In other words, for example, the second image information is reciprocated relative to the relative image information. Speed and amount of movement must be so

be dimensioned so that the information to be displayed comes to light.

The use of the method according to the invention is particularly suitable for displaying a password and / or a number field.

Brief description of the drawings

The invention will be explained in more detail with reference to exemplary embodiments shown in the drawings. Show it:

Fig. 1 is a display device showing a first image information;

2 shows a second image information;

3 shows information in the form of a numeric field;

4 shows a mobile radio device with a display device; and

5 shows the sequence of a method according to the invention.

Detailed description of preferred embodiments of the invention

In the following the invention will be described by way of example

Embodiments described in FIGS. 1 to 5 are described.

Fig. 1 shows a display device 40. Such a display device 40, for example, on a mobile phone, a tablet PC, a Computer or a wristwatch are used to display information.

On the display device 40 shown in Fig. 1, a first

Information 10 shown. In the embodiment shown, the first image information 10 is essentially a (picture) noise. Further, controls 12, 14 are provided, which will be described below.

In Fig. 2, a second image information 20 is shown. The second

Image information 20 corresponds to the information to be displayed. It is a password in FIG. 2 in the form of a number sequence 21 to 24.

In principle, information to be displayed can be spied on, e.g. by a third party, who "looks over the shoulder" trying to read the information of the display device 40 or by a

Malware (Trojans). To complicate this will be the first

Image information 10 and the second image information 20 statically superimposed. During the static superimposition of the two image information 10, 20, it is not possible to recognize the second image information 20, since the first image information 10 comes to the foreground in such a way that the second image information 10 comes to the foreground

Image information 20 is not recognizable. This is achieved, for example, in that the second image information 20 is colored in such a way that it approximately corresponds to the basic color tone of the first image information 10. Further, in the step of superimposing, the second image information 20 is displayed in front of and / or behind the first image information 10 so that a part of the image components of the first image information 10 of the

Image components of the second image information 20 is superimposed and / or that a part of the image components of the second image information 20 is superimposed by the image components of the first image information 10. However, when the first image information 10 and the second image information 20 are moved relative to each other, the second image information 20 can be perceived by the human eye. The movement can

for example, by slightly moving the second image information 20 in a reciprocal manner to the left and right. It can

be sufficient to move individual components of the first 10 and / or the second 20 image information in different directions. The

Frequency of the back and forth movement must be chosen so that the information to be displayed comes to light.

The reason for the perception of the information to be displayed is the moiré effect, according to which, due to superimposition and interference, the information to be displayed appears in front of the human eye at least during the period of relative movement. A brief "Nachleu th" of the information 30 after the end of the movement is possible due to the inertia of the human eye.

The superposition takes place by displaying the second image information before the first image information. The first and second image information have approximately the same basic color tone, so that with static overlay the information to be displayed is not recognizable.

Instead of moving the second image information 20 relative to the first image information 10, the first image information 10 may also be moved relative to the second image information 20. In addition, it is possible to single

Components 21 to 24 of the second image information 20 individually

move. Furthermore, one of the two image information 10, 20 can be arbitrarily subdivided, for example in strips. When generating the relative Moving these strips of the first or second image information 10, 20 are moved relative to the other image information. Also in this case, the information to be displayed becomes visible to the human eye. A malicious software (Trojan), which is a snapshot of the

Display device 40 generates, even if at this time the two image information 10, 20 are moved relative to each other - do not start with this snapshot, because the displayed

Information in the noise of the displayed image goes down.

Fig. 3 shows an information to be displayed 30 in the form of a number field on which the numbers 0 to 9 are arranged randomly. The individual digits of the numeric field are visible in FIG. 3, despite the "static" representation, to illustrate what information is before the

human eye in relative motion between the first

Image information 10 and the second image information 20 is visible.

The information to be displayed 30 is visible during the relative movement and briefly thereafter, because the human eye reacts slowly and thus a "afterglow effect" is perceived.

So that an information to be displayed is not displayed unnecessarily long or in order to influence its display duration, it may be provided that an action is necessary in order to display the information to be displayed. For example, it can be provided that on one

touch-sensitive display device 40 of the viewer

Slider 12 is actuated and thus the relative movement is performed only during the slide operation. Alternatively, it may be necessary to operate a button 14 shown. The information to be displayed is displayed only during the button operation. Furthermore, can be provided that the relative movement, for example, can only be performed when the viewer performs a movement on the touch-sensitive display device 40 with a finger or other suitable input means. Another

Possibility of an action would be if the relative movement takes place only while the display device 40 is moved. Such a movement may comprise, for example, a tilting of the display device 40 and be detected by means of a tilt sensor (not shown) associated with the display device 40.

3, which corresponds to an example of information to be displayed using the method according to the invention, it is possible, for example, to enter a PIN without third parties being able to spy on them by "looking over their shoulders." The number field 30 only becomes during the relative movement between the first 10 and the second 20 image information visible.

4 shows a display device 40 of a mobile radio device 41, on which the method according to the invention can be used.

In the method according to the invention, as shown in FIG. 5, initially in a first step a first image information 10 is displayed on one

Display device 40 of, for example, a mobile device 41 shown. Subsequently, the first image information 10 is overlaid with a second image information 20. The second image information 20 may be, for example, a password, in particular a one-time password, or a numeric field (see step S2). The first step S1 and the second step S2 may be performed substantially simultaneously or with a time delay. The second image information 20 and the first image information 10 are designed so that they do not show the information to be displayed during a static overlay. However, if a relative movement takes place between the first 10 and the second 20 image information, the

information to be displayed is visible to a viewer of the display device 40 (step S3).

Reference List 0 First picture information

12 slides

14 button

20 Second image information

21-24 Image components of the second image information 20 30 Information to be displayed

40 display device

41 mobile device

S1-S3 process steps

Claims

Patent claims

1. A method for presenting information on a

Display device (40), comprising the following steps:

- Displaying a first image information (10) on the

Display device (40),

- Overlaying the first image information (20) with a second

Image information (10) on the display device (40), wherein the second image information (20) contains the information to be displayed, and wherein the second image information (20) is formed so that it is not recognizable in a static overlay, and

- Generating a relative movement between the first (10) and the second (20) image information on the display device (40), so that at least during the relative movement, the information to be displayed for a viewer of the display device (40) is visible.

2. The method according to claim 1, characterized in that the first image information (10) is essentially an image noise.

3. Method according to claim 1, characterized in that, in the step of superposing, the second image information (20) is displayed in front of and / or behind the first image information (10) such that a part of the image components of the first image information (10) of the

Image components of the second image information (20) is superimposed and / or that a part of the image components of the second image information (20) is superimposed by the image components of the first image information (10).

4. The method according to any one of the preceding claims, characterized in that when generating the relative movement of individual components (21-24) of the second image information (20) are moved in different directions.

5. The method according to any one of the preceding claims, characterized in that the information to be displayed is a password, in particular a one-time password, a CAPTCHA or a number field (30).

6. The method according to any one of the preceding claims, characterized in that the relative movement is only generated while the viewer performs a specific action.

7. The method according to claim 6, characterized in that the action is a touch of the display device (40) and / or a movement with an input means, in particular a finger, over the

Display device (40) and / or a movement, in particular an inclination, the display device comprises.

8. The method according to any one of the preceding claims, characterized in that the relative movement comprises a repeated, reciprocal movement of the first and / or second image information.

9. Use of the method for presenting information according to one of the preceding claims in order to present a password, in particular a one-time password.

Use of the method for presenting information according to any one of the preceding claims to display a numeric field (30).