WO2008025824A1 - Procédé de transmission sécurisée d'une information numérique au moyen d'une information optique - Google Patents

Procédé de transmission sécurisée d'une information numérique au moyen d'une information optique Download PDF

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Publication number
WO2008025824A1
WO2008025824A1 PCT/EP2007/059059 EP2007059059W WO2008025824A1 WO 2008025824 A1 WO2008025824 A1 WO 2008025824A1 EP 2007059059 W EP2007059059 W EP 2007059059W WO 2008025824 A1 WO2008025824 A1 WO 2008025824A1
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WO
WIPO (PCT)
Prior art keywords
information
image information
image
digital information
optical
Prior art date
Application number
PCT/EP2007/059059
Other languages
German (de)
English (en)
Inventor
Hans-Peter Huth
Andreas KIRSTÄDTER
Manfred Schäfer
Original Assignee
Siemens Enterprise Communications Gmbh & Co. Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Enterprise Communications Gmbh & Co. Kg filed Critical Siemens Enterprise Communications Gmbh & Co. Kg
Publication of WO2008025824A1 publication Critical patent/WO2008025824A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/44—Secrecy systems
    • H04N1/448—Rendering the image unintelligible, e.g. scrambling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division

Definitions

  • Possibilities are, for example, fingerprint sensors or electrical password or key information memories as well as smart cards or USB-based keys with the aid of which the passwords can be determined more easily. These solutions are usually host ⁇ economically and financially costly. Furthermore, usability or operating problems occur and complex and extensive software is required in the device for accessing the Internet or the intranets.
  • the object on which the invention is based is therefore to improve the registration for the use of services or access to digital information such as passwords or key information, in particular with regard to operability.
  • the object is solved by the features of claims 1, 14 and 21.
  • the essential aspect of the invention is that the digital information is converted by means of a conversion method into an image information representing a temporal sequence of brightness and / or color changes and the image information is optically output in at least one area of an optical output device.
  • the original digital information is determined using an inverse conversion method.
  • Conversion methods for the formation of image information are in particular modulation methods such as FSK methods.
  • the image information is advantageously converted into encoded image information that can be transmitted via transmission media, and after a transmission, the encoded image information is converted into the image information with the aid of an inverse encoding process.
  • COMPRESSION can approximate methods such as MPEC method or object-oriented scripting languages such as JavaScript script be used as Kodie ⁇ approximate methods.
  • the image information is advantageously formed in such a way that it is output as a sequence of images in the optical output unit, the color and / or the color intensity and / or the brightness being changed from image to image.
  • An image can be spatially and color-segmented, or in the respective segments of the image, a separate image can be optically output.
  • optical detection with a photosensor and an inverse conversion module for converting the signals can be realized in a separate reader with little effort.
  • An integration of the opti ⁇ cal detection and the inverse conversion module for the conversion can be integrated into existing facilities such as a USB stick with little effort.
  • a further advantageous embodiment is that the sequence takes place after regular or irregular periods.
  • the regular time is right derive ⁇ on the refresh rate of the screen especially before ⁇ geous.
  • FIG. 1 shows a screen with a log-in window
  • FIG. 2 shows a coding variant for an image sequence
  • Figure 3 shows an inventive optical reader
  • Figure 4 in a flow chart according to the invention Ver ⁇ drive the
  • Figure 5a shows an application of the invention with an access key and a Torap formation
  • Figure 5b shows an application of the invention with a
  • Access key and two gate applications shows an application with one access terminals and two readers.
  • FIG. 1 shows a screen BS on which a log-on window AF is displayed.
  • the screen is realized by a color screen, for example by an LCD screen, wherein the screen BS represents a visual ITAein ⁇ direction.
  • the logon window AF is displayed in the context of an internet browser IB.
  • An image sequence BF is shown in the registration window AF, it being possible for the image sequence BF to be positioned as desired in the registration window AF.
  • the image sequence BF according to the invention is formed by the i present a digital information, in particular binary information is converted into image information bi, which is formed by at least temporary brightness and / or dyes ⁇ nde ⁇ requirements.
  • image information bi which is formed by at least temporary brightness and / or dyes ⁇ nde ⁇ requirements.
  • FIG. 2 the formation of an image information bi or an image sequence BF is explained by way of example.
  • the colors R, G, B indicated in FIG. 2 are related to an RGB color space based on the three-color theory.
  • the color red is represented by R
  • the color green by G the color blue by b.
  • An image B will now be at least one of the three colors
  • color coding advantageously uses differential coding.
  • image information bi for example, modulation methods such as FSK methods are used.
  • time period t can ⁇ example, be advantageous tuned to the refresh rate of the screen BS, thereby a very economical Reali ⁇ tion a time period t is possible.
  • each combination of the colors R, G, B and the intensity or the brightness h of the colors can be assigned a digital information i - indicated in Figure 2, the name Bl (ei).
  • the digital information i may consist of a single binary information such as 0 or 1 or a sequence of binary information or a bit sequence such as 1110.
  • the images B1. B6 are successively combined with a time span t in an image information bi and together form the image sequence BF.
  • the image sequence can be formed, for example, only by two images B-denoted by B7 and B8 in FIG.
  • ⁇ at pictures B7, B8, for example, as follows are formed:
  • the pictures B7 and B8 are sequentially with a time t combined into one image information bi and form to ⁇ gether the image sequence BF.
  • the image sequence can BF even by an image - are ge ⁇ forms - denoted in the figure 2 with B9.
  • the picture B9 is hereby gebil- det by G h and B h / 2 with the associated binary information 1011 and will ⁇ summarized with a period of image information bi.
  • image sequence BF For an image sequence BF, all the images shown Bl to TB7 or the images Bl to TB9 but also the images B7 to TB9 can be combined, and for delimitation, images without color can be inserted. This results in an image sequence BF up to 36-digit binary information. Since very extensive binary information can be represented by an image sequence BF, extensive key information or passwords or credentials can advantageously also be represented by an image sequence.
  • an image sequence BF representing a digital information i is to divide the image sequence BF into spatially separated segments, for example four rectangular segments, an image being formed in each of the segments and displayed on the screen BS. These sub-images are formed according to the previously-described method of forming images B. Due to the division into segments, even more information - in particular binary information - can be recorded and transmitted in an image sequence BF.
  • Previously described methods represent conversion ⁇ method KONV, with which the digital information i is converted into an image information bi.
  • the conversion methods KONV can be implemented in a conversion module KONM in a device such as a personal computer or in a server in a communicaiton network.
  • the image sequences BF can be generated in particular in Interbrowsern IB for transmission over, for example, the Internet with coding method KV according to the Graphics Interchange Format GIF with up to 256 different colors per frame or according to Portable Network Graphics graphics format for Rastergra ⁇ fiken and displayed on the screen BS become.
  • the image sequence FB can be formed by further coding methods KODV, for example by a film, for example in an MPEG format, or as an object-oriented scripting language JavaScript, in particular in WEB browsers. the.
  • Especially with scripting languages can be übermit ⁇ telnde image information bi are transmitted at a greatly reduced amount of data - for example, over the Internet.
  • the amount of information to be transmitted at a frame rate or a time t can be determined by suitable choice of the algorithm for the optical encoding and the appropriate color resolution.
  • the encoding information model KODV may be by a coding module KODM as a program - the name KODM tet angedeu- in FIG. 2
  • a according to the invention shown in an image sequence BF information i and to detect an optical output image information bi is, according to the invention with a pre-interpret ⁇ tes in Figure 3 optical reader LG provided.
  • the optical reader LG is essentially formed by a control unit ST that a Fotodi- ode FD or a photo diode array, and a computer interface ⁇ site with an optical / electrical converter, for example, such as a USB interface, USB, is connected.
  • an inverse conversion module ⁇ iKONM is integrated in the inverse conversion method iKONV to the invention is realized, for example.
  • the image sequence BF optically output by the screen BS is optically detected, converted into an electrical signal bf, and this is transmitted to the Forwarded control unit ST - indicated in Figure 3 by BF and bf arrows.
  • an optical / electrical converter or a photodiode FD or a photodiode array must be provided for each segment - not shown.
  • the electric, optical converters should, in order to recognize as many colors and color mixtures, have a good color selectivity.
  • phototransistors or CCDs or charge-coupled devices can also be used.
  • red, green, blue-a photodiode FD or a phototransistor with a corresponding color filter is to be provided. These can also be combined in an array.
  • the electric signals is bf back into the original digital information i such as a Anmeldein- formation or key information si transformed using the inverse convergence ⁇ t istsroutine iKONV by, for example corresponding demodulation - indicated i in Figure 3 by the label.
  • coding methods KODV are advantageously used, with the aid of which the image information bi is converted into a coded image information bi suitable for the transmission.
  • these can be, for example, MPEG formats, or object-oriented scripting languages such as JavaScript.
  • the inverse coding methods iKONV are used to recover the image information bi.
  • both methods, the inverse conversion method iKONV and the inverse coding method iKODV are advantageously combined in the control unit ST - indicated in the figure by the additional designation (iKODV).
  • the optical reading device LG Since the image sequence BF has a plurality of images B which are optically output in each case for a time span t, the optical reading device LG has to be synchronized to this time span t. If the time t at the frame rate of the screen BiId- BS tuned, so this is dominant in the optical signal or in the image sequence and a corresponding BF Phasenre ⁇ gel Vietnamese can easily thereon a ⁇ rest in the control unit ST.
  • This phase-locked loop may ⁇ rate at a frequency of 100 Hz is very simple and is thus realized economically at a Bitwiederhol - for example as a digital PLL (Phase Locked Loop) or with oversampling.
  • a particularly advantageous possibility is t the time or simply filter out the image ⁇ repetition of the entire brightness signal, for example by a tunable, narrow-band filter, since a more extensive inde ⁇ dependence on the used screen BS is achieved.
  • a memory SP is provided for storing the recovered digital information i as key information si or passwords pw, wherein the memory of the processor system preferably suitable.
  • an Internet user on the screen BS in the Internet browser selects a page.
  • the selected page contains a login dialog or a login procedure, wherein on the screen BS in a logon window AF a logon information al frame BF is represented.
  • the note with the image sequence BF information i is digitally signed by a service provider and is open ⁇ protects against attacks such as replay attacks (eg realized by time stamps, which is signed with or via a challenge and response protocol, which is triggered by the image sequence BF)
  • the information i displayed with the image sequence BF is encrypted (eg with a "pre shared key", only known with a key or a group of keys). This can also be used to protect customer relationships (e-banking) or member access, whose offers are only intended for a closed user group.
  • the user takes the image sequence BF with the reader LG and ensures that the reader LG can optically capture the image sequence BF. This can be done, for example, by holding the reader LG close to the image sequence BF which is optically displayed in the screen BS or in the internet browser in the registration window AF.
  • the reading device LG sends the password ⁇ pw found in the memory SP or the key information si via the USB interface USB secured to the personal computer PC.
  • the security for the transmission can for example be increased in that the reading device LG, for example, an LED (Light Emitting Diode) for optical transmission to the personal computer PC has ⁇ - not shown.
  • the LED is used for example in a small, light-tight tube to which a plug is attached, via which the personal computer PC is connected to the reader LG.
  • the password pw or the key information si is transmitted only if the reader LG is inserted with the tube in the personal ⁇ computer PC. This avoids the password pw or the key information si being visible from the reading device LG via any stray light.
  • the passp word pw or the key information si determined from the memory SP is entered in the designated area of the internet browser and transmitted to the Internet IN, whereby the login procedure or the login dialog in the Internet IN is continued.
  • Additional rights management allows flexible use and portability - for example, for DRM, applications, devices and facilities, using a "legal token" as a key.
  • Keyboard interface and the reader LG can enter or type password pw instead of the keyboard.
  • this interface can also be implemented by a USB interface USB as already described or by a wireless interface such as e.g. Bluetooth can be realized, with special drivers are not required for this.
  • the infrared interface used for the Fernbedie ⁇ voltage of the TV as a physical Realisie ⁇ tion of an interface between the reader LG and the TV.
  • a Reali ⁇ tion of the interface via the keyboard interface an additional plug for connection to the reader can be inserted into the cable between the keyboard and a terminal.
  • a further advantageous realization of a section ⁇ interface between the reader and a terminal LG is the fact that existing wireless interfaces as Bluetooth or IRDA ⁇ play example for the transmission of passwords or pw key information si be used.
  • the password pw for example, to a the Anmeldeproze ⁇ Major controlling application AP or Torap directions TA in, for example, to the personal computer PC or on a server on the Internet IN are transmitted.
  • FIG. 5 a shows a gate application TA, with the aid of which access to a further application-not shown-is produced, wherein a gate application TA can represent a portal application to other applications.
  • the Torap directions TA is associated with an optical transmitter So-TA, which is realized for example on a screen BS of a device and generates the image sequence BF.
  • LG is an optical receiver Eo-LG for capturing the image sequence BF, for example an optical / electrical converter or a photodiode FD or photodiode array for detecting a plurality of colors and an interface SS-LG, but not optical Interface for the
  • a Torap bearing TA may alternatively be a TV set TV with a return channel - for example via the telephone network - or a local interface - for example, a VCR or a set-top box - be.
  • a Torappli- cation TA can also offer several different image sequences BF, e.g. in a menu, the user can select a suitable image sequence with a reader LG and then automatically perform the authentication process with the reader LG.
  • the LG reader offers the possibility of expanding and transmitting key information si via secure procedures.
  • a variant of the extension of the access security consists in a key application for a gate application TA in the context of Internet access at the personal computer PC after authentication and authorization a key sequence for another Torap proceedings TA on another terminal, e.g. to get another personal computer PC or a TV TV.
  • a user obtains an access key zs from the gate application TA in the personal computer PC connected to the Internet-indicated in FIG. 5b by the name TA-PC.
  • This access key zs is stored in the memory SP of the reader LG and can for example be the access key zs for one or more program broadcasts on a television set Be TV.
  • an image sequence BF is optically output or displayed and optically recorded by the reading device LG and converted into a key information si for registration on the screen BS of the television set TV, the key information si representing an access key zs.
  • This function according to the invention can also be used, for example, for access keys zs for buildings such as e.g. Apartments or
  • the access key zs the stored first reader LG passkey is zs example ⁇ wireless manner or transferred to a second reader LG2 via personal computer PC.
  • Means of the second reading device LG2 is tert as in Figure 5b erläu ⁇ , the entry key zs to as TV TV übertra ⁇ gene.
  • the access key zs from the first reader LGL of parents to the second reader LG2 transfer.
  • the access key zs in the television set TV provided by the parents or permitted program broadcasts are enabled.
  • the invention is not limited to the embodiment, but can be used in all applications in which passwords pw or key information si in a simple and secure way for a login or access, even temporary access to buildings such as apartment, hotel, or company mobile devices such as entertainment devices or facilities of companies or access to communication networks and their services.
  • the image sequence used BF and ver ⁇ turned key information si and the passwords pw must be matched to the respective application.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

Une information numérique (i) est convertie par un procédé de conversion (KONV) en information d'image (bi) représentant une suite temporelle de changements de luminosité et/ou de couleurs puis elle est optiquement produite sous forme de suite d'images (BF) dans au moins une zone d'un dispositif de production optique (BS). Des convertisseurs optiques/électriques (FD) permettent d'effectuer la saisie optique de l'information d'image (bi) optiquement produite et de la convertir en signal électrique (bf) ainsi que de déterminer l'information numérique (i) initiale à partir du signal électrique (bf) par un procédé de conversion inverse (iKONV). Ainsi, des informations numériques (i) telles qu'une information relative à une ouverture de session ou à des mots de passe (pw) ou bien une information clé (si) peut être transmise de manière simple et sûre.
PCT/EP2007/059059 2006-08-31 2007-08-30 Procédé de transmission sécurisée d'une information numérique au moyen d'une information optique WO2008025824A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006040732.6 2006-08-31
DE102006040732 2006-08-31

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WO2008025824A1 true WO2008025824A1 (fr) 2008-03-06

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PCT/EP2007/059059 WO2008025824A1 (fr) 2006-08-31 2007-08-30 Procédé de transmission sécurisée d'une information numérique au moyen d'une information optique

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999005866A1 (fr) * 1997-07-22 1999-02-04 Emelko Glenn A Systeme de transmission de donnees par signaux de television
WO2001093473A2 (fr) * 2000-05-31 2001-12-06 Optinetix (Israel) Ltd. Systeme et procedes pour distribuer des informations au moyen d'un media de diffusion
WO2002084909A1 (fr) * 2001-04-09 2002-10-24 Koplar Interactive Systems International, L.L.C. Procedes et dispositif universels pour des possibilites de promotion sue des appareils portatifs
EP1521464A2 (fr) * 2003-10-01 2005-04-06 Koplar Interactive Systems International, LLC Méthode et dispositif pour moduler un signal vidéo avec des signaux de données
EP1589756A2 (fr) * 2004-04-02 2005-10-26 Koplar Interactive Systems International, LLC Méthode et système pour détecter la présence d'un signal à partir d'un signal vidéo affiché sur une unité d'affichage numérique
US20050264694A1 (en) * 2002-08-20 2005-12-01 Optinetix (Israel ) Ltd. Method and apparatus for transferring data within viewable portion of video signal

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999005866A1 (fr) * 1997-07-22 1999-02-04 Emelko Glenn A Systeme de transmission de donnees par signaux de television
WO2001093473A2 (fr) * 2000-05-31 2001-12-06 Optinetix (Israel) Ltd. Systeme et procedes pour distribuer des informations au moyen d'un media de diffusion
WO2002084909A1 (fr) * 2001-04-09 2002-10-24 Koplar Interactive Systems International, L.L.C. Procedes et dispositif universels pour des possibilites de promotion sue des appareils portatifs
US20050264694A1 (en) * 2002-08-20 2005-12-01 Optinetix (Israel ) Ltd. Method and apparatus for transferring data within viewable portion of video signal
EP1521464A2 (fr) * 2003-10-01 2005-04-06 Koplar Interactive Systems International, LLC Méthode et dispositif pour moduler un signal vidéo avec des signaux de données
EP1589756A2 (fr) * 2004-04-02 2005-10-26 Koplar Interactive Systems International, LLC Méthode et système pour détecter la présence d'un signal à partir d'un signal vidéo affiché sur une unité d'affichage numérique

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