WO2012035340A1 - Secure association - Google Patents
Secure association Download PDFInfo
- Publication number
- WO2012035340A1 WO2012035340A1 PCT/GB2011/051724 GB2011051724W WO2012035340A1 WO 2012035340 A1 WO2012035340 A1 WO 2012035340A1 GB 2011051724 W GB2011051724 W GB 2011051724W WO 2012035340 A1 WO2012035340 A1 WO 2012035340A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- association
- secure
- devices
- network
- authentication
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/06—Authentication
-
- 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
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
-
- 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
- H04L63/18—Network architectures or network communication protocols for network security using different networks or channels, e.g. using out of band channels
-
- 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
- H04L63/20—Network architectures or network communication protocols for network security for managing network security; network security policies in general
Definitions
- the invention relates to a method for associating devices securely. I n particular, the invention relates to the formation of secure associations between IP- enabled devices when they have not previously connected.
- SA peer to peer security associations
- Pre-configuring such devices with shared keys or certificates at manufacture may be considered but this approach does not extrapolate to allow interoperation between other legacy devices or devices that have been preconfigured with different keys/certificates.
- I P-type SA refers to a security association between two IP-enabled peers. Examples include associations at IPSec level, TLS level, or application level.
- a form of SA can also be established in a TLS session, provided at least one of the devices is addressable (the server) but there are similar requirements for certificates or pre-shared keys/passwords.
- a method for forming secure associations between IP-enabled devices comprising: establishing a first association between a first one of said devices and a first network server,
- the method requires that a declaration of ownership of a target device is made by the subscriber of a originating device and that the subscriber giving that declaration is authenticated by means of a SIM card, say.
- the originating device establishes secure connection to a first server.
- the target device establishes a secure connection to a second server.
- the first and second servers can establish a conventional IP-type SA (e.g. using IPSec or TLS), there is a chain of secure associations between the two devices. This chain is then used to build a new secure association between originating device and target Device.
- the first and second servers thus act as proxies for two devices respectively and negotiate the secure association on their behalf. They then transfer the new secure association information securely to the devices using the existing chain of secure associations.
- the step of assign ing a network real m identity includes authenticating the second device using a manufacturer-provisioned identity.
- a system for forming secure associations between IP-enabled devices comprising a first network server and a second network server the servers being operable to establish a secure I P-type association therebetween, said secure association having corresponding secure association information
- the first network server includes means for establishing a first association with a first one of said devices, means for receiving a declaration of ownership of a second one of said devices from a subscriber authentication storage means, means for assigning a network realm identity to the second device, means for sending an authentication challenge to the subscriber authentication storage means; means for receiving authentication information in response to the authentication challenge; and means for transferring the authentication information to the second device;
- the second network server having means for establish ing a second association with the second device in accordance with the transferred authentication information
- first network server transfers said corresponding secure association information to the first device using the first association and the second network server transfers said corresponding secure association information to the second device using the second association, thereby providing the necessary association between the first and second IP-enabled devices.
- FIG. 1 illustrates the step of device registration in accordance with the invention
- Figure 2 illustrates the step of building an inter-server SA as a bridge in accordance with the invention.
- FIG. 3 illustrates the step of establishing an inter-device SA by proxy in accordance with the invention.
- the first stage is to establish an I P-type SA between a Device and a network Server (which will then be used as a future negotiation and policy enforcement point).
- a Subscriber known to a network using a (U)SIM
- U User Equipment
- This stage * may * involve authentication of the device using a manufacturer-provisioned identity (MAC address, Serial Number) or just declaration of that identity (if there is n o pre-loaded key/certificate to authenticate).
- the protocol thereby provides some protection against devices being multiply-registered (by different owners), stolen, hacked, mis-configured etc.
- This stage * may * involve the choice of a pseudonym or pseudonym range to provide privacy protection for the Subscriber and/or device user.
- the registration stage involves the network sending an authentication challenge to the (U)SIM, with some resulting key material (Kc or CK
- the key(s) used for the SA are then derived from that key material, and there is a corresponding transfer of key material from the HLR and derivation at the network side.
- Various device-side methods include: temporary insertion of SI M card into device, connecting target device to a device which already holds the (U)SI M via USB, Infrared, NFC Bluetooth, WLAN, Zigbee etc.
- Various network-side methods include the Server presenting itself as an access node (like a base station) and obtaining an authentication vector. This works with protocols like U MA, I MS or various forms of heterogeneous access to 3GPP networks (WLAN interworking etc.) Or the GBA protocol could be used.
- One specific embodiment includes the Servers negotiating an IKE SA, and then transferring the associated keys and data to the devices, so they can establish one of more CHI LD_SAs. Another specific embodiment involves the Servers also negotiating the CHILD_SA(s).
- a third embodiment involves the Servers "faking" the initial exchanges of I KE so that they end up with an agreed set of SA data but without going through the specific IKE ports or doing further Diffie-Helman exchanges.
- a fourth embodiment involves the Servers negotiating a new key which the Devices later use for pre-shared-key TLS.
- the end devices can be low end (they don't need to support Diffie Helman or an IKE stack, or present and verify certificates etc.).
- the Servers can enforce policy rules so only allow a specific set of SAs to be established, certain protocols, lifetime limits etc. (The subscriber can contribute to the set of policy rules when registering the device). They can enforce Lawful Intercept or packet inspection by retaining keys; or (if the opposite is required) take themselves out of the encryption path.
- the Servers cou ld bui ld a route between named devices, even when there is no d irect addressability (because of NAT, firewalls etc.), and "tunnel" future SA-protected communications over this route. Or enable direct addressability once secured.
- Salesman meets potential customer at a convention. Salesman has a home PC containing technical brochures, trial software etc. (Devicel ). Potential customer has a smart-phone (Device2). Salesman wants to grant potential customer temporary access to his home network to retrieve the selected brochures, software etc. and collect some details about the customer. There are confidential details, so link needs to be secured end to end.
- the Servers When negotiating an inter-device SA, the Servers detect that both devices are within range of an open WLAN hotspot. They are each prompted to connect to the hotspot, and can then share files (but encrypted and integrity protected so other hotspot users can't see the files, and neither can the hotspot operator).
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Small-Scale Networks (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
To enable formation of secure associations between IP-enabled devices when they have not previously connected, a method is proposed where a declaration of ownership of a target device is made by the subscriber of a originating device and that subscriber giving that declaration is authenticated by means of a SIM card, say. The originating device establishes secure connection to a first server. The target device establishes a secure connection to a second server. Provided the first and second servers can establish a conventional IP-type SA (e.g. using IPSec or TLS), there is a chain of secure associations between the two devices. This chain is then used to build a new secure association between originating device and target Device. The first and second servers thus act as proxies for two devices respectively and negotiate the secure association on their behalf. They then transfer the new secure association information securely to the devices using the existing chain of secure associations.
Description
SECURE ASSOCIATION
Field of the Invention
The invention relates to a method for associating devices securely. I n particular, the invention relates to the formation of secure associations between IP- enabled devices when they have not previously connected.
Background to the Invention
There is currently no simple way for low-cost IP-enabled devices to establish peer to peer security associations (SA) (shared keys and algorithms, authenticated device identities, connection info, ports and protocols) when they have not previously connected.
Pre-configuring such devices with shared keys or certificates at manufacture may be considered but this approach does not extrapolate to allow interoperation between other legacy devices or devices that have been preconfigured with different keys/certificates.
I n the following discussion , the term "I P-type" SA refers to a security association between two IP-enabled peers. Examples include associations at IPSec level, TLS level, or application level.
It is possible for relatively high-end devices to establish such an SA using
IPSec provided:
a) They have existing certificates or a shared key and
b) They are IP addressable and have already discovered each other's IPs. In many networks this won't apply.
A form of SA can also be established in a TLS session, provided at least one of the devices is addressable (the server) but there are similar requirements for certificates or pre-shared keys/passwords.
It is also possible for local area networks to establish a sub-I P SA either by manual assistance (loading of keys for WEP, WPA, Bluetooth PI N entry) or by unauthenticated Elliptic Curve Diffie Helman hoping there is no nearby Man In The Middle (Bluetooth v2.1 "Just Works" pairing).
There is no easy way to enforce authorization controls on such connections (e.g. a network-level policy about which devices can connect to which other devices, what protocols are supported, lifetime limits, whether the connection keys are escrowed etc.). Furthermore, there is no easy way to build IP-type SAs.
It is therefore an object of the invention to obviate or at least mitigate the aforementioned problems.
Summary of the Invention
In accordance with a first aspect of the invention, there is provided a method for forming secure associations between IP-enabled devices, the method comprising: establishing a first association between a first one of said devices and a first network server,
receiving a declaration of ownership of a second one of said devices from a subscriber authentication storage means to the network,
assigning a network realm identity to the second device,
sending an authentication challenge to the subscriber authentication storage means;
receiving authentication information in response to the authentication challenge;
transferring the authentication information to the second device,
facilitating a second association between the second device and a second network server in accordance with the transferred authentication information,
establishing a secure connection between the first and second network servers, said secure con nection having correspondi ng secure association information, and
transferring said corresponding secure association information to both first and second devices using the first and second associations respectively, thereby providing the necessary association between the first and second IP-enabled devices.
Thus to enable formation of secure associations between IP-enabled devices when they have not previously connected, the method requires that a declaration of ownership of a target device is made by the subscriber of a originating device and that the subscriber giving that declaration is authenticated by means of a SIM card, say. The originating device establishes secure connection to a first server. The target device establishes a secure connection to a second server. Provided the first and second servers can establish a conventional IP-type SA (e.g. using IPSec or TLS), there is a chain of secure associations between the two devices. This chain is then used to build a new secure association between originating device and target Device. The first and second servers thus act as proxies for two devices respectively and negotiate the secure association on their behalf. They then transfer the new secure association information securely to the devices using the existing chain of secure associations.
Preferably, the step of assign ing a network real m identity includes authenticating the second device using a manufacturer-provisioned identity.
In accordance with a further aspect of the invention, there is provided a system for forming secure associations between IP-enabled devices, the system comprising a first network server and a second network server the servers being operable to establish a secure I P-type association therebetween, said secure association having corresponding secure association information, wherein the first network server includes means for establishing a first association with a first one of said devices, means for receiving a declaration of ownership of a second one of said devices from a subscriber authentication storage means, means for assigning a network realm identity to the second device, means for sending an authentication challenge to the subscriber authentication storage means; means for receiving authentication information in response to the authentication challenge; and means for transferring the authentication information to the second device;
the second network server having means for establish ing a second association with the second device in accordance with the transferred authentication information,
wherein the first network server transfers said corresponding secure association information to the first device using the first association and the second network server transfers said corresponding secure association information to the second device using the second association, thereby providing the necessary association between the first and second IP-enabled devices. Brief Description of the Drawings
For a better understanding of the present invention, reference will now be made, by way of example only, to the accompanying drawings in which:-
Figure 1 illustrates the step of device registration in accordance with the invention;
Figure 2 illustrates the step of building an inter-server SA as a bridge in accordance with the invention; and
Figure 3 illustrates the step of establishing an inter-device SA by proxy in accordance with the invention. Detailed Description
The first stage is to establish an I P-type SA between a Device and a network Server (which will then be used as a future negotiation and policy
enforcement point). There is a registration protocol in which a Subscriber (known to a network using a (U)SIM) declares "ownership" of the target device to the network, and gives it a "friendly" identity within a network realm (e.g. devicename.subscribername@realm). This stage *may* involve authentication of the device using a manufacturer-provisioned identity (MAC address, Serial Number) or just declaration of that identity (if there is n o pre-loaded key/certificate to authenticate). The protocol thereby provides some protection against devices being multiply-registered (by different owners), stolen, hacked, mis-configured etc. This stage *may* involve the choice of a pseudonym or pseudonym range to provide privacy protection for the Subscriber and/or device user.
The registration stage involves the network sending an authentication challenge to the (U)SIM, with some resulting key material (Kc or CK||IK or K_ASME) which is then transferred locally to the target device under the subscriber's control. The key(s) used for the SA are then derived from that key material, and there is a corresponding transfer of key material from the HLR and derivation at the network side. Various device-side methods include: temporary insertion of SI M card into device, connecting target device to a device which already holds the (U)SI M via USB, Infrared, NFC Bluetooth, WLAN, Zigbee etc. Various network-side methods include the Server presenting itself as an access node (like a base station) and obtaining an authentication vector. This works with protocols like U MA, I MS or various forms of heterogeneous access to 3GPP networks (WLAN interworking etc.) Or the GBA protocol could be used.
On completion of the first stage we have (say) Devicel connected to a Serverl using an I P-type SA. Similarly, we have Device2 connected to Server2 using an IP-type SA. We also now assume that Serverl and Server2 can establish a conventional IP-type SA (e.g. using I PSec or TLS) so we have three sides of a square in terms of existing SAs. This is then used to build the fourth side of the square: a new SA between Devicel and Device2. Broadly Serverl and Server2 act as "proxies" for Devicel and Device2 and negotiate the SA on their behalf. They then transfer the new SA information securely to the devices using the existing Device-Server SAs. One specific embodiment includes the Servers negotiating an IKE SA, and then transferring the associated keys and data to the devices, so they can establish one of more CHI LD_SAs. Another specific embodiment involves the Servers also negotiating the CHILD_SA(s). A third embodiment involves the Servers "faking" the initial exchanges of I KE so that they end up with an agreed set of SA data but without going through the specific IKE ports or doing further Diffie-Helman exchanges. A fourth embodiment involves the Servers negotiating a new key which
the Devices later use for pre-shared-key TLS. The general protocol also covers cases like Serverl =Server2, Device2=Server2 and Device2=Server3.
This staged approach has several advantages. 1 . The end devices can be low end (they don't need to support Diffie Helman or an IKE stack, or present and verify certificates etc.). 2. The Servers can enforce policy rules so only allow a specific set of SAs to be established, certain protocols, lifetime limits etc. (The subscriber can contribute to the set of policy rules when registering the device). They can enforce Lawful Intercept or packet inspection by retaining keys; or (if the opposite is required) take themselves out of the encryption path. 3. The Servers cou ld bui ld a route between named devices, even when there is no d irect addressability (because of NAT, firewalls etc.), and "tunnel" future SA-protected communications over this route. Or enable direct addressability once secured.
Sample Use Cases
1 . Salesman meets potential customer at a convention. Salesman has a home PC containing technical brochures, trial software etc. (Devicel ). Potential customer has a smart-phone (Device2). Salesman wants to grant potential customer temporary access to his home network to retrieve the selected brochures, software etc. and collect some details about the customer. There are confidential details, so link needs to be secured end to end.
2. Employee has personal smartphone with SIM from Operator 1 , and is assigned a company phone with SIM from Operator 2. Employee wishes to synch photos, calendar, contacts etc. between devices. They have incompatible memory cards. Employee could use Bluetooth, but it's -1 GByte of data so would be very slow. Synching over 3G will be very expensive. Both phones support WLAN, but neither can act as access point, and the user doesn't want to fiddle around setting up a shared key anyway.
When negotiating an inter-device SA, the Servers detect that both devices are within range of an open WLAN hotspot. They are each prompted to connect to the hotspot, and can then share files (but encrypted and integrity protected so other hotspot users can't see the files, and neither can the hotspot operator).
Claims
1 . A method for forming secure associations between IP-enabled devices, the method comprising:
establishing a first association between a first one of said devices and a first network server,
receiving a declaration of ownership of a second one of said devices from a subscriber authentication storage means to the network,
assigning a network realm identity to the second device,
sending an authentication challenge to the subscriber authentication storage means;
receiving authentication information in response to the authentication challenge;
transferring the authentication information to the second device,
facilitating a second association between the second device and a second network server in accordance with the transferred authentication information,
establishing a secure connection between the first and second network servers, said secure con nection having correspondi ng secure association information, and
transferring said corresponding secure association information to both first and second devices using the first and second associations respectively, thereby providing the necessary association between the first and second I P-enabled devices.
2. A method as claimed in claim 1 , wherein the step of assigning a network realm identity includes authenticating the second device using a manufacturer- provisioned identity.
3. A system for forming secure associations between I P-enabled devices, the system comprising a first network server and a second network server the servers being operable to establish a secure IP-type association therebetween, said secure association having corresponding secure association information, wherein the first network server includes means for establishing a first association with a first one of said devices, means for receiving a declaration of ownership of a second one of said devices from a subscriber authentication storage means, means for assigning a network realm identity to the second device, means for sending an authentication challenge to the subscriber authentication storage means; means for receiving authentication information in response to the authentication challenge; and means for transferring the authentication information to the second device;
the second network server having means for establishing a second association with the second device in accordance with the transferred authentication information,
wherein the first network server transfers said corresponding secure association information to the first device using the first association and the second network server transfers said corresponding secure association information to the second device using the second association, thereby providing the necessary association between the first and second IP-enabled devices.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/823,583 US9699156B2 (en) | 2010-09-14 | 2011-09-14 | Secure association |
CN201180054825.6A CN103283203B (en) | 2010-09-14 | 2011-09-14 | Security association |
EP11761111.1A EP2617174B1 (en) | 2010-09-14 | 2011-09-14 | Secure association |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB1015324.5A GB201015324D0 (en) | 2010-09-14 | 2010-09-14 | Secure association |
GB1015324.5 | 2010-09-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012035340A1 true WO2012035340A1 (en) | 2012-03-22 |
Family
ID=43065183
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2011/051724 WO2012035340A1 (en) | 2010-09-14 | 2011-09-14 | Secure association |
Country Status (5)
Country | Link |
---|---|
US (1) | US9699156B2 (en) |
EP (1) | EP2617174B1 (en) |
CN (1) | CN103283203B (en) |
GB (1) | GB201015324D0 (en) |
WO (1) | WO2012035340A1 (en) |
Cited By (2)
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WO2015036785A1 (en) | 2013-09-13 | 2015-03-19 | Vodafone Ip Licensing Limited | Secure communication with a mobile device |
WO2016028198A1 (en) * | 2014-08-20 | 2016-02-25 | Telefonaktiebolaget L M Ericsson (Publ) | Methods, devices and management terminals for establishing a secure session with a service |
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EP2606707A1 (en) * | 2010-08-16 | 2013-06-26 | Corning Cable Systems LLC | Remote antenna clusters and related systems, components, and methods supporting digital data signal propagation between remote antenna units |
WO2012035338A1 (en) * | 2010-09-14 | 2012-03-22 | Vodafone Ip Licensing Limited | Authentication in a wireless access network |
US9253168B2 (en) | 2012-04-26 | 2016-02-02 | Fitbit, Inc. | Secure pairing of devices via pairing facilitator-intermediary device |
CN203504582U (en) | 2011-02-21 | 2014-03-26 | 康宁光缆系统有限责任公司 | Distributed antenna system and power supply apparatus for distributing electric power thereof |
US10659163B2 (en) | 2014-09-25 | 2020-05-19 | Corning Optical Communications LLC | Supporting analog remote antenna units (RAUs) in digital distributed antenna systems (DASs) using analog RAU digital adaptors |
WO2016071902A1 (en) | 2014-11-03 | 2016-05-12 | Corning Optical Communications Wireless Ltd. | Multi-band monopole planar antennas configured to facilitate improved radio frequency (rf) isolation in multiple-input multiple-output (mimo) antenna arrangement |
WO2016075696A1 (en) | 2014-11-13 | 2016-05-19 | Corning Optical Communications Wireless Ltd. | Analog distributed antenna systems (dass) supporting distribution of digital communications signals interfaced from a digital signal source and analog radio frequency (rf) communications signals |
EP3235336A1 (en) | 2014-12-18 | 2017-10-25 | Corning Optical Communications Wireless Ltd. | Digital interface modules (dims) for flexibly distributing digital and/or analog communications signals in wide-area analog distributed antenna systems (dass) |
WO2016098111A1 (en) | 2014-12-18 | 2016-06-23 | Corning Optical Communications Wireless Ltd. | Digital- analog interface modules (da!ms) for flexibly.distributing digital and/or analog communications signals in wide-area analog distributed antenna systems (dass) |
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- 2011-09-14 WO PCT/GB2011/051724 patent/WO2012035340A1/en active Application Filing
- 2011-09-14 US US13/823,583 patent/US9699156B2/en active Active
- 2011-09-14 EP EP11761111.1A patent/EP2617174B1/en active Active
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WO2015036785A1 (en) | 2013-09-13 | 2015-03-19 | Vodafone Ip Licensing Limited | Secure communication with a mobile device |
EP3832982A1 (en) | 2013-09-13 | 2021-06-09 | Vodafone IP Licensing Limited | Secure communication with a mobile device |
WO2016028198A1 (en) * | 2014-08-20 | 2016-02-25 | Telefonaktiebolaget L M Ericsson (Publ) | Methods, devices and management terminals for establishing a secure session with a service |
US10693879B2 (en) | 2014-08-20 | 2020-06-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods, devices and management terminals for establishing a secure session with a service |
Also Published As
Publication number | Publication date |
---|---|
CN103283203B (en) | 2017-11-07 |
CN103283203A (en) | 2013-09-04 |
US20140150063A1 (en) | 2014-05-29 |
US9699156B2 (en) | 2017-07-04 |
EP2617174A1 (en) | 2013-07-24 |
GB201015324D0 (en) | 2010-10-27 |
EP2617174B1 (en) | 2018-11-07 |
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