WO2008129546A2 - Dispositif d'encryptage vocal - Google Patents

Dispositif d'encryptage vocal Download PDF

Info

Publication number
WO2008129546A2
WO2008129546A2 PCT/IL2008/000537 IL2008000537W WO2008129546A2 WO 2008129546 A2 WO2008129546 A2 WO 2008129546A2 IL 2008000537 W IL2008000537 W IL 2008000537W WO 2008129546 A2 WO2008129546 A2 WO 2008129546A2
Authority
WO
WIPO (PCT)
Prior art keywords
telephone
audio data
link
microphone
over
Prior art date
Application number
PCT/IL2008/000537
Other languages
English (en)
Other versions
WO2008129546A3 (fr
Inventor
Lior Frenkel
Amir Zilberstein
Original Assignee
Gita Technologies Ltd.
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 Gita Technologies Ltd. filed Critical Gita Technologies Ltd.
Publication of WO2008129546A2 publication Critical patent/WO2008129546A2/fr
Publication of WO2008129546A3 publication Critical patent/WO2008129546A3/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • H04M1/6041—Portable telephones adapted for handsfree use
    • H04M1/6058—Portable telephones adapted for handsfree use involving the use of a headset accessory device connected to the portable telephone
    • H04M1/6066—Portable telephones adapted for handsfree use involving the use of a headset accessory device connected to the portable telephone including a wireless connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/03—Protecting confidentiality, e.g. by encryption
    • H04W12/033—Protecting confidentiality, e.g. by encryption of the user plane, e.g. user's traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
    • H04L63/0442—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload wherein the sending and receiving network entities apply asymmetric encryption, i.e. different keys for encryption and decryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/04—Supports for telephone transmitters or receivers
    • H04M1/05—Supports for telephone transmitters or receivers specially adapted for use on head, throat or breast

Definitions

  • the present invention relates generally to communication systems, and specifically to devices and methods for communication encryption.
  • Snapshield (a part of Tadiran Communications Group, Petah Tikva, Israel) offers the Snapcell cellular encryption unit as an accessory for certain mobile phones. Snapcell attaches to a standard GSM handset and is said to encrypt voice communications in a manner that is undetectable by the mobile operator.
  • GSMK mbH (Berlin, Germany) offers Cryptophone mobile telephones with built-in encryption capability.
  • Embodiments of the present invention provide simple, convenient, end-to-end solutions for secure encryption of voice data that are carried over telephone networks.
  • encryption and decryption are carried out autonomously by an external audio device, such as a user headset, which communicates over the network via a suitable telephone.
  • the audio device typically uses an encryption key that is available to the other party to the call (who may have a similar audio device) , but is not available to the telephone itself.
  • the voice traffic is relayed through the phone in encrypted form, as undecipherable data.
  • This solution permits strong encryption to be introduced using a conventional telephone without modification, and also prevents eavesdroppers from accessing clear (or weakly encrypted) voice traffic at any point between the ends of the call. Performing the encryption in the external audio device also defeats attempts by hackers to access communication traffic using malicious code within the telephone itself.
  • a headset for use with a telephone, the headset including: a housing, which is configured to be fastened to a head of a user; an earphone speaker associated with the housing; a microphone associated with the housing; an encryption processor, which is contained in the housing and is coupled to receive and encrypt audio input from the microphone so as to generate outgoing encrypted audio data, for decryption using an encryption key that is not available to the telephone; and a telephone interface unit, which is contained in the housing, and is configured to convey the outgoing encrypted audio data over 'a link to the telephone for transmission by the telephone over a telephone network, and to receive incoming audio data over the link from the telephone to be played as audio output via the earphone.
  • the telephone interface unit includes a wireless interface, and the link is a wireless link.
  • the wireless link has a range no greater than 50 m.
  • the incoming audio data are encrypted, and wherein the encryption processor is operative to decrypt the incoming encrypted audio data for output via the earphone.
  • communication apparatus including: a telephone, for conveying audio data over a telephone network; and a headset, including: an earphone speaker; a microphone; an encryption processor, which is coupled to receive and encrypt audio input from the microphone so as to generate outgoing encrypted audio data; and a telephone interface unit, which is configured to convey the outgoing encrypted audio data over a link to the telephone for transmission of the outgoing encrypted audio data over the telephone network without decryption of the encrypted audio data by the telephone, and which is configured to receive incoming audio data over the link from the telephone to be played as audio output via the earphone.
  • the telephone interface unit includes a first wireless interface, and wherein the telephone includes a second wireless interface, and wherein the link is a wireless link between the first and second wireless interfaces.
  • communication apparatus including first and second headsets, for use with respective first and second telephones, which are configured to communicate with one another via a telephone network, each of the first and second headsets including: an earphone speaker; a microphone; an encryption processor, which is coupled to receive and encrypt audio input from the microphone so as to generate outgoing encrypted audio data, for decryption by the other of the first and second headsets using an encryption key that is not available to the telephones, and to decrypt incoming encrypted audio data for audio output via the earphone; and a telephone interface unit, which is configured to convey the outgoing encrypted audio data over a link to the respective telephone for transmission over the telephone network, and to receive the incoming encrypted audio data over the link from the respective telephone.
  • a method for communication including: coupling a headset to communicate over a link with a telephone, the headset including an earphone speaker, a microphone, and an encryption processor; receiving and encrypting audio input from the microphone using the encryption processor so as to generate outgoing encrypted audio data, for decryption using an encryption key that is not available to the telephone; and conveying the outgoing encrypted audio data over the link to the telephone for transmission by the telephone over a telephone network to a receiving party having the encryption key.
  • audio apparatus for use with a telephone
  • the apparatus including: a speaker; a microphone; an encryption processor, which is coupled to receive and encrypt audio input from the microphone so as to generate outgoing encrypted audio data, for decryption using an encryption key that is not available to the telephone; and a wireless telephone interface unit, which is configured to convey the outgoing encrypted audio data over a wireless link to the telephone for transmission by the telephone over a telephone network, and to receive incoming audio data over the wireless link from the telephone to be played as audio output via the earphone.
  • a method for communication including: coupling an audio device to communicate over a wireless link with a telephone, the audio device including a speaker, a microphone, and an encryption processor; receiving and encrypting audio input from the microphone using the encryption processor so as to generate outgoing encrypted audio data, for decryption using an encryption key that is not available to the telephone; and conveying the outgoing encrypted audio data over the wireless link to the telephone for transmission by the telephone over a telephone network to a receiving party having the encryption key.
  • communication apparatus including: a telephone, for conveying audio data over a telephone network; and an audio device, including: a speaker; a microphone; an encryption processor, which is coupled to receive and encrypt audio input from the microphone so as to generate outgoing encrypted audio data; and a wireless telephone interface unit, which is configured to convey the outgoing encrypted audio data over a wireless link to the telephone for transmission of the outgoing encrypted audio data over the telephone network without decryption of the encrypted audio data by the telephone, and which is configured to receive incoming audio data over the wireless link from the telephone to be played as audio output via the earphone.
  • Fig. 1 is a schematic, pictorial illustration showing a system for encrypted voice communication, in accordance with an embodiment of the present invention
  • Fig. 2 is a block diagram that schematically shows functional components of a telephone headset with encryption and decryption capabilities, in accordance with an embodiment of the present invention.
  • Fig. 1 is a schematic, pictorial illustration showing a system 20 for encrypted voice communication, in accordance with an embodiment of the present invention.
  • a telephone user 22 carries on voice communication using a cellular telephone 24 via a telephone network 26 with another user 28.
  • User 28 communicates via a wired telephone 30.
  • the embodiments described hereinbelow relate mainly to cellular telephones and cellular networks, the principles of the present invention may similarly be applied in communications over networks and telephones of other kinds.
  • headsets 32 and 34 respectively, for voice input to and output from their respective telephones 24 and 30.
  • the headsets exchange encrypted digital audio data over short-range wireless radio links with the respective telephones.
  • short-range in this context refers to links, such a BluetoothTM radio link, that typically operate over distances no greater than 50 m, and in common use operate over distances no greater than about 10 m.
  • a headset implementing the principles of the present invention may communicate with a suitable telephone over other sorts of wireless links, such as an infrared link. Further alternatively, the headset may be connected by a suitable wired digital link to the telephone.
  • a desktop speakerphone device with a wireless link to a cellular telephone, may incorporate the sort of encryption and decryption capabilities that are described herein.
  • headset 32 comprises a housing 34 having a clip 36 for fastening to the head of user 22.
  • clip 36 is designed to fit over the user's ear.
  • Housing 34 comprises a speaker 38 for playing audio output and a microphone 40 for receiving audio input from the user.
  • Interface and encryption circuits are contained in housing 34, as described hereinbelow.
  • the design of housing 34 and clip 36 in Fig. 1 are shown here only by way of example, however, and the principles of the present invention may be implemented in substantially any sort of headset, which may be fastened to the user's head by any suitable means.
  • headset 34 is designed to clip over the head of user 28, with the interface and encryption circuits contained in a housing together with an earphone speaker and a separate microphone extending toward the user's mouth.
  • the housing that contains the interface and encryption circuits may comprise two separate units connected by wire.
  • Fig. 2 is a block diagram that schematically shows functional components of headset 32, in accordance with an embodiment of the present invention.
  • Microphone 40 converts sounds vocalized by user 22 to audio input signals, which are preprocessed and digitized by an audio input circuit 42, as is known in the art.
  • An encryption processor 44 encrypts the digitized audio input data using a key that is typically not available to telephone 24.
  • Headset 32 thus differs, for example, from Bluetooth headsets that are known in the art, which may use Bluetooth-standard encryption to communicate with a telephone: In such conventional headsets the decryption key must be available to the telephone in order for the headset to perform its required function.
  • the encryption function of processor 44 may be switched on and off by the user, so as to enable the headset to be used both for secure and non-secure communications.
  • Encryption processor 44 outputs encrypted audio data to telephone 24 via a radio interface 46, which thus serves as the telephone interface unit.
  • radio interface 46 may comprise a Bluetooth interface, and may thus communicate with many off-shelf telephones that are equipped with such an interface, without modification to the telephone.
  • the telephone interface unit may comprise a different type of radio interface, such as an IEEE 802.11 interface or a proprietary interface type, or substantially any other suitable type of wireless or wired interface.
  • Telephone 24 receives the encrypted audio data and transmits it over network 26 to telephone 30. As noted above, telephone 24 is typically unable to decrypt the audio data, and simply transmits the encrypted data "as is.” Telephone 30 receives and passes the encrypted audio data to headset 34 for decryption. For this purpose, headset 34 is provisioned with the appropriate key, either by ' pre-configuration or by means of a suitable, secure key exchange protocol with headset 32.
  • headset 34 may transmit its public key to headset 32 for use in encrypting data, which may then be decrypted only using the private key held by headset 34.
  • headsets 32 and 34 may be provided as a set, each provisioned with the necessary key or keys for encrypted communication with the other.
  • a special-purpose telephone (not shown) , suitably configured and provisioned with the appropriate key, may be used to perform the encryption and decryption functions at one end of the call.
  • Radio interface 46 receives encrypted incoming audio data from telephone 24 and passes the data to processor 44 for decryption.
  • An audio output circuit 48 converts the decrypted voice data to output audio signals, which are played by speaker 38.
  • Processor 44 may use any suitable encryption scheme, either symmetric (in which the same key is used for encryption and decryption, as in the DES and AES algorithms) or asymmetric (such as RSA) .
  • One possible solution to this problem is to operate interface 46 and telephone 24 in data transmission mode (as is used in messaging and Web browsing applications in Third-Generation [3G] cellular phones or "smart phones,” for example), so that the encrypted data are transmitted without loss.
  • processor 44 may be configured to perform a special encryption scheme so that decryption is not adversely affected by the compression and decompression applied by the telephone.
  • processor 44 may be configured to perform a special encryption scheme for use by processor 44 so that decryption is not adversely affected by the compression and decompression applied by the telephone.
  • processor 44 may be configured to perform a special encryption scheme for use by processor 44 so that decryption is not adversely affected by the compression and decompression applied by the telephone.
  • processor 44 may
  • headset 32 is shown in Fig. 2 as comprising certain functional blocks, these blocks do not necessarily correspond to the actual physical components of the headset. Other elements of the headset, such as a power source and user controls, are omitted from the figure for the sake of simplicity.
  • the headset may typically be implemented using a set of one or more integrated circuit chips along with discrete components. Alternatively or additionally, certain functions, such as those of processor 44, may be implemented in software running on a suitable programmable device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Telephone Set Structure (AREA)
  • Telephone Function (AREA)
  • Headphones And Earphones (AREA)

Abstract

La présente invention concerne un micro-casque (32) destiné à être utilisé avec un téléphone (24) comprenant un boîtier (34), qui est configuré pour être attaché à la tête d'un utilisateur (22), un haut-parleur d'oreillette (38) associé au boîtier et un microphone (40) associé au boîtier. Un processeur d'encryptage (44), contenu dans le boîtier, est couplé afin de recevoir et encrypter une entrée audio en provenance du microphone afin de générer des données audio encryptées sortantes, en vue d'un décryptage effectué en utilisant une clé d'encryptage qui n'est pas disponible au téléphone. Une unité d'interface téléphonique (46), contenue dans le boîtier, est configurée pour acheminer les données audio encryptées sortantes sur une liaison vers le téléphone pour une transmission par le téléphone sur un réseau téléphonique, et pour recevoir des données audio entrantes sur la liaison depuis le téléphone pour qu'elles soient lues comme sortie audio par l'intermédiaire des oreillettes.
PCT/IL2008/000537 2007-04-19 2008-04-17 Dispositif d'encryptage vocal WO2008129546A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL182699 2007-04-19
IL182699A IL182699A0 (en) 2007-04-19 2007-04-19 Voice encryption device

Publications (2)

Publication Number Publication Date
WO2008129546A2 true WO2008129546A2 (fr) 2008-10-30
WO2008129546A3 WO2008129546A3 (fr) 2009-02-19

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PCT/IL2008/000537 WO2008129546A2 (fr) 2007-04-19 2008-04-17 Dispositif d'encryptage vocal

Country Status (2)

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IL (1) IL182699A0 (fr)
WO (1) WO2008129546A2 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20091006A1 (it) * 2009-06-09 2010-12-10 Claudio Petronici "sistema di crittatura di comunicazioni vocali"
WO2013064717A1 (fr) * 2011-11-01 2013-05-10 Savox Communications Oy Ab (Ltd) Equipement de communication pour une communication sécurisée
CN103401675A (zh) * 2013-07-15 2013-11-20 江苏智联天地科技有限公司 成对耳机端对端通信的加解扰方法、装置及加解扰耳机
FR3034939A1 (fr) * 2015-04-09 2016-10-14 Jules Alfille Dispositif et procede de protection des echanges pour telephonie mobile
WO2016193404A1 (fr) * 2015-06-04 2016-12-08 Nagravision S.A. Procédés et systèmes de gestion de session de communication pour le compte de points d'extrémité cryptographiques
US9571475B2 (en) * 2015-06-09 2017-02-14 Verizon Patent And Licensing Inc. Call encryption systems and methods
ES2616116A1 (es) * 2016-07-13 2017-06-09 Álvaro DÍAZ BAÑO Dispositivo portátil de cifrado de audio mediante protocolo tls
EP2651071A4 (fr) * 2010-12-10 2017-11-15 Toa Corporation Système de microphone sans fil
CN107690685A (zh) * 2015-06-01 2018-02-13 耐瑞唯信有限公司 用于将加密数据传送到通信设备的方法和系统
US9900769B2 (en) 2015-05-29 2018-02-20 Nagravision S.A. Methods and systems for establishing an encrypted-audio session
US10122767B2 (en) 2015-05-29 2018-11-06 Nagravision S.A. Systems and methods for conducting secure VOIP multi-party calls
WO2021158868A1 (fr) * 2020-02-06 2021-08-12 Quantum Cloak, Inc. Sécurisation de communications par l'intermédiaire de dispositifs informatiques
EP4021016A1 (fr) * 2020-12-23 2022-06-29 GN Audio A/S Intégration de dispositif auditif de haut-parleur

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Non-Patent Citations (1)

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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2262143A1 (fr) * 2009-06-09 2010-12-15 Petronici, Claudio Système de chiffrement pour communications vocales
ITMI20091006A1 (it) * 2009-06-09 2010-12-10 Claudio Petronici "sistema di crittatura di comunicazioni vocali"
EP2651071A4 (fr) * 2010-12-10 2017-11-15 Toa Corporation Système de microphone sans fil
WO2013064717A1 (fr) * 2011-11-01 2013-05-10 Savox Communications Oy Ab (Ltd) Equipement de communication pour une communication sécurisée
CN103401675A (zh) * 2013-07-15 2013-11-20 江苏智联天地科技有限公司 成对耳机端对端通信的加解扰方法、装置及加解扰耳机
FR3034939A1 (fr) * 2015-04-09 2016-10-14 Jules Alfille Dispositif et procede de protection des echanges pour telephonie mobile
US10715557B2 (en) 2015-05-29 2020-07-14 Nagravision S.A. Systems and methods for conducting secure VOIP multi-party calls
US11606398B2 (en) 2015-05-29 2023-03-14 Nagravision S.A. Systems and methods for conducting secure VOIP multi-party calls
US10122767B2 (en) 2015-05-29 2018-11-06 Nagravision S.A. Systems and methods for conducting secure VOIP multi-party calls
US9900769B2 (en) 2015-05-29 2018-02-20 Nagravision S.A. Methods and systems for establishing an encrypted-audio session
US10251055B2 (en) 2015-05-29 2019-04-02 Nagravision S.A. Methods and systems for establishing an encrypted-audio session
US10649717B2 (en) 2015-06-01 2020-05-12 Nagravision S.A. Methods and systems for conveying encrypted data to a communication device
CN107690685A (zh) * 2015-06-01 2018-02-13 耐瑞唯信有限公司 用于将加密数据传送到通信设备的方法和系统
US9891882B2 (en) 2015-06-01 2018-02-13 Nagravision S.A. Methods and systems for conveying encrypted data to a communication device
US20180157460A1 (en) * 2015-06-01 2018-06-07 Nagravision S.A. Methods and systems for conveying encrypted data to a communication device
JP2018524860A (ja) * 2015-06-01 2018-08-30 ナグラビジョン エス アー 暗号化データを通信装置に伝達する方法及びシステム
US10356059B2 (en) 2015-06-04 2019-07-16 Nagravision S.A. Methods and systems for communication-session arrangement on behalf of cryptographic endpoints
CN107690790A (zh) * 2015-06-04 2018-02-13 耐瑞唯信有限公司 用于代表加密端点的通信‑会话布置的方法和系统
WO2016193404A1 (fr) * 2015-06-04 2016-12-08 Nagravision S.A. Procédés et systèmes de gestion de session de communication pour le compte de points d'extrémité cryptographiques
US10038676B2 (en) 2015-06-09 2018-07-31 Verizon Patent And Licensing Inc. Call encryption systems and methods
US9571475B2 (en) * 2015-06-09 2017-02-14 Verizon Patent And Licensing Inc. Call encryption systems and methods
ES2616116A1 (es) * 2016-07-13 2017-06-09 Álvaro DÍAZ BAÑO Dispositivo portátil de cifrado de audio mediante protocolo tls
WO2021158868A1 (fr) * 2020-02-06 2021-08-12 Quantum Cloak, Inc. Sécurisation de communications par l'intermédiaire de dispositifs informatiques
EP4021016A1 (fr) * 2020-12-23 2022-06-29 GN Audio A/S Intégration de dispositif auditif de haut-parleur
US11832063B2 (en) 2020-12-23 2023-11-28 Gn Audio A/S Speakerphone hearing device integration

Also Published As

Publication number Publication date
IL182699A0 (en) 2008-03-20
WO2008129546A3 (fr) 2009-02-19

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