WO2002013026A1 - A method for controlling data at a client device - Google Patents

A method for controlling data at a client device Download PDF

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Publication number
WO2002013026A1
WO2002013026A1 PCT/AU2001/000963 AU0100963W WO0213026A1 WO 2002013026 A1 WO2002013026 A1 WO 2002013026A1 AU 0100963 W AU0100963 W AU 0100963W WO 0213026 A1 WO0213026 A1 WO 0213026A1
Authority
WO
WIPO (PCT)
Prior art keywords
client device
server
resource
data
request
Prior art date
Application number
PCT/AU2001/000963
Other languages
French (fr)
Inventor
Sydney Gordon Low
Peter Yandell
Original Assignee
Sharinga Networks Inc.
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 Sharinga Networks Inc. filed Critical Sharinga Networks Inc.
Priority to AU2001277408A priority Critical patent/AU2001277408A1/en
Publication of WO2002013026A1 publication Critical patent/WO2002013026A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/34—Network arrangements or protocols for supporting network services or applications involving the movement of software or configuration parameters 
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/53—Network services using third party service providers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/56—Provisioning of proxy services
    • H04L67/561—Adding application-functional data or data for application control, e.g. adding metadata
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/56—Provisioning of proxy services
    • H04L67/564—Enhancement of application control based on intercepted application data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/75—Indicating network or usage conditions on the user display
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/2866—Architectures; Arrangements
    • H04L67/289—Intermediate processing functionally located close to the data consumer application, e.g. in same machine, in same home or in same sub-network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/329—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the application layer [OSI layer 7]

Definitions

  • the present invention relates to a method for controlling data at a client device, and to an access system.
  • the invention relates to a proxy-based method and system for controlling client-side cookies.
  • Web servers can use cookies to track user activities, a function which, while often useful for both the user and the web publisher, also raises privacy concerns for many users. Consequently, recent web browsers have provided the ability to control cookies to some extent. For example, Netscape NavigatorTM provides a number of user-configurable preferences related to cookies, specifically the ability to accept all cookies, block all cookies, accept only cookies which get sent back to the originating server, or to warn the user before a cookie is accepted and allow the user to accept or refuse the cookie.
  • the information provided to the user in the latter case is rather cryptic, containing the name and value of the cookie together with the domain for which the cookie will be used.
  • this information is not likely to be sufficient to help the user to decide whether the cookie should be allowed or refused. For this reason, it is doubtful that most users would select this option.
  • many users are unlikely to even be aware of the existence of these cookie options, and will therefore use a default setting which allows all cookies.
  • these options are browser-specific, and are not available in all browsers. It is desired, therefore, to provide at least a useful alternative, or a method and a system which provides any user with the ability to accept or refuse web browser cookies, independently of software on the client computer.
  • a method for controlling data at a client device including the steps of: receiving a request from said client device for network resource data; sending said request to a server having said resource data; receiving a response from the server including the resource data and additional data; and sending code for displaying information on the additional data and providing the ability to accept or refuse the additional data at said client device.
  • the present invention also provides a method for controlling the setting of variables at a client device, including the steps of: receiving a request from said client device directed to a resource server; forwarding the request to said resource server; receiving a response from said resource server, including a resource and header instructions for setting variables; and sending code which provides the ability to accept or refuse the setting of variables at said client device in accordance with said header instructions.
  • the present invention also provides a network access system having: means for receiving a request from said client device for network resource data; means for sending said request to a server having said resource data; means for receiving a response from the server including the resource data and additional data; and means for sending code for displaying information on the additional data and providing the ability to accept or refuse the additional data at said client device.
  • Figure 1 is a block diagram of a preferred embodiment of an access system
  • Figure 2 is a flow diagram of a process executed by the access system.
  • An access system 2 for a communications network includes a plurality of random access servers (RASs) 4 with terminal devices, such as modems, that provide access for remote computers 10 of users, over a telecommunications network 12 to a communications network 14, such as the Internet.
  • the access system 2 also includes a local switch or hub 6 connected to the RASs 4, and a proxy server 16 connected to the switch 6.
  • the proxy server 16 and switch 6 provide access for remote users to the Internet 14 via a router 8 connected thereto.
  • the access system includes known access components provided by an Internet service provider (ISP).
  • ISP Internet service provider
  • the components may also be the components of an access system as described in International Patent Application No. PCT/AUOO/00418, herein incorporated by reference.
  • the proxy server 16 and/or switch 6 are configured and include logic to operate as described below. For simplicity, the process is described below as being executed by a proxy server 16.
  • the logic may be provided by software code and/or hardware circuits to execute the process, and the logic may be distributed on a communications network.
  • a client computer 10 attempts to retrieve an HTML document from a web server of the Internet 14. It issues an HTTP GET request which is sent to the proxy server 16, at step 20.
  • the proxy 16 inspects its cache for a recently cached copy of the document in order to avoid having to retrieve it from the remote server. The document is not found in the cache, so the proxy 16 issues an HTTP GET request to the web server to retrieve the document, at step 22.
  • the web server receives the request and includes a Set- Cookie header in the HTTP response in order to request that a cookie be set for the domain of the web server.
  • the proxy 16 would merely cache and return the document, propagating the Set-Cookie response header to the client computer 10.
  • the proxy server 16 detects the Set-Cookie header at step 24, removes it, and inserts JavaScript code, at step 26, which contains information derived from the Set- Cookie response header into the retrieved HTML document.
  • the JavaScript code is set to run when the HTML document loads by associating a JavaScript function with the document BODY onLoad event.
  • the code creates a modal or simulated modal dialog window which informs the user that the remote server wishes to set a cookie, providing also the name and value of the cookie, and which servers are able to access the cookie.
  • the window includes text which attempts to explain what the cookie is likely to be used for, and a recommendation on whether to accept it or not.
  • the default recommendation is to refuse the cookie, but certain cookies are regarded as benign and are accordingly recommended to be accepted.
  • the modal dialog window then can contain the following text:
  • the web server www.batfmk. com wishes to set a cookie that will be sent only back to itself.
  • the cookie has an expiry date of 17 November 2000.
  • the cookie appears to be setting the text language of the requested page to English.
  • the "Accept Cookie” button sets the cookie using JavaScript by closing the window, forcing a reload of the original requested page and exiting the JavaScript function.
  • the "Refuse Cookie” button merely closes the window and exits the JavaScript function ensuring the cookie is not stored on the client 10.
  • the "Help” button creates a new browser window and loads a reference document containing useful information and links to educate the user about cookies and help him or her decide whether to accept or refuse the cookie in question.
  • the proxy-based cookie filter described above provides a uniform interface which allows users to inspect, accept or refuse client-side cookies without requiring any special software or configuration on the client computer.
  • the interface provides an informative description of the cookie parameters.
  • the process executed is independent of the client device 10 used and can be configured to operate with different browser types, such as those on PDAs and mobile phones.

Abstract

A method for controlling data at a client device, including the steps of receiving a request from the client device for network resource data, sending the request to a server having the resource data, receiving a response from the server including the resource data and additional data and sending code for displaying information on the additional data, and providing the ability to accept or refuse the additional data at the client device.

Description

A METHOD FOR CONTROLLING DATA AT A CLIENT DEVICE
Field of the Invention
The present invention relates to a method for controlling data at a client device, and to an access system. In particular the invention relates to a proxy-based method and system for controlling client-side cookies.
Background of the Invention
It is often useful to store state information for a particular user or host computer when browsing the Internet. This may be achieved by using client-side 'cookies', which contain information such as a unique session identifier, preference information, the last page visited on a particular web site, and so on. Web servers can use cookies to track user activities, a function which, while often useful for both the user and the web publisher, also raises privacy concerns for many users. Consequently, recent web browsers have provided the ability to control cookies to some extent. For example, Netscape Navigator™ provides a number of user-configurable preferences related to cookies, specifically the ability to accept all cookies, block all cookies, accept only cookies which get sent back to the originating server, or to warn the user before a cookie is accepted and allow the user to accept or refuse the cookie. However, the information provided to the user in the latter case is rather cryptic, containing the name and value of the cookie together with the domain for which the cookie will be used. For the average Internet user with no understanding of cookies, this information is not likely to be sufficient to help the user to decide whether the cookie should be allowed or refused. For this reason, it is doubtful that most users would select this option. Furthermore, many users are unlikely to even be aware of the existence of these cookie options, and will therefore use a default setting which allows all cookies. Also, these options are browser-specific, and are not available in all browsers. It is desired, therefore, to provide at least a useful alternative, or a method and a system which provides any user with the ability to accept or refuse web browser cookies, independently of software on the client computer. Summary of the Invention
In accordance with the present invention there is provided a method for controlling data at a client device, including the steps of: receiving a request from said client device for network resource data; sending said request to a server having said resource data; receiving a response from the server including the resource data and additional data; and sending code for displaying information on the additional data and providing the ability to accept or refuse the additional data at said client device.
The present invention also provides a method for controlling the setting of variables at a client device, including the steps of: receiving a request from said client device directed to a resource server; forwarding the request to said resource server; receiving a response from said resource server, including a resource and header instructions for setting variables; and sending code which provides the ability to accept or refuse the setting of variables at said client device in accordance with said header instructions.
The present invention also provides a network access system having: means for receiving a request from said client device for network resource data; means for sending said request to a server having said resource data; means for receiving a response from the server including the resource data and additional data; and means for sending code for displaying information on the additional data and providing the ability to accept or refuse the additional data at said client device. Brief Description of the Drawings
A preferred embodiment of the present invention is hereinafter described, by way of example only, with reference to the accompanying drawing wherein:
Figure 1 is a block diagram of a preferred embodiment of an access system; and Figure 2 is a flow diagram of a process executed by the access system.
Detailed Description of a Preferred Embodiment of the Invention
An access system 2 for a communications network, as shown in Figure 1, includes a plurality of random access servers (RASs) 4 with terminal devices, such as modems, that provide access for remote computers 10 of users, over a telecommunications network 12 to a communications network 14, such as the Internet. The access system 2 also includes a local switch or hub 6 connected to the RASs 4, and a proxy server 16 connected to the switch 6. The proxy server 16 and switch 6 provide access for remote users to the Internet 14 via a router 8 connected thereto. The access system includes known access components provided by an Internet service provider (ISP). The components may also be the components of an access system as described in International Patent Application No. PCT/AUOO/00418, herein incorporated by reference. The proxy server 16 and/or switch 6 are configured and include logic to operate as described below. For simplicity, the process is described below as being executed by a proxy server 16. The logic may be provided by software code and/or hardware circuits to execute the process, and the logic may be distributed on a communications network.
In a typical sequence, a client computer 10 attempts to retrieve an HTML document from a web server of the Internet 14. It issues an HTTP GET request which is sent to the proxy server 16, at step 20. The proxy 16 inspects its cache for a recently cached copy of the document in order to avoid having to retrieve it from the remote server. The document is not found in the cache, so the proxy 16 issues an HTTP GET request to the web server to retrieve the document, at step 22. The web server receives the request and includes a Set- Cookie header in the HTTP response in order to request that a cookie be set for the domain of the web server.
In prior art systems, the proxy 16 would merely cache and return the document, propagating the Set-Cookie response header to the client computer 10. However, in the access system 2, the proxy server 16 detects the Set-Cookie header at step 24, removes it, and inserts JavaScript code, at step 26, which contains information derived from the Set- Cookie response header into the retrieved HTML document. The JavaScript code is set to run when the HTML document loads by associating a JavaScript function with the document BODY onLoad event. The code creates a modal or simulated modal dialog window which informs the user that the remote server wishes to set a cookie, providing also the name and value of the cookie, and which servers are able to access the cookie. Moreover, the window includes text which attempts to explain what the cookie is likely to be used for, and a recommendation on whether to accept it or not. The default recommendation is to refuse the cookie, but certain cookies are regarded as benign and are accordingly recommended to be accepted. For example, the web server might send a Set- Cookie header containing "Fdlang=en". The modal dialog window then can contain the following text:
The web server www.batfmk. com wishes to set a cookie that will be sent only back to itself.
The cookie has an expiry date of 17 November 2000.
The name of the cookie is "Fdlang" and the value is "en".
The cookie appears to be setting the text language of the requested page to English.
We recommend that you accept the cookie.
What do you want to do?
Three buttons below this text are labelled "Accept Cookie", "Refuse Cookie", and "Help". The "Accept Cookie" button sets the cookie using JavaScript by closing the window, forcing a reload of the original requested page and exiting the JavaScript function. The "Refuse Cookie" button merely closes the window and exits the JavaScript function ensuring the cookie is not stored on the client 10. The "Help" button creates a new browser window and loads a reference document containing useful information and links to educate the user about cookies and help him or her decide whether to accept or refuse the cookie in question.
By inspecting Set-Cookie headers and adding code to handle the cookies at the network level, the proxy-based cookie filter described above provides a uniform interface which allows users to inspect, accept or refuse client-side cookies without requiring any special software or configuration on the client computer. The interface provides an informative description of the cookie parameters. The process executed is independent of the client device 10 used and can be configured to operate with different browser types, such as those on PDAs and mobile phones.
Many modifications will be apparent to those skilled in the art without departing from the scope of the present invention as herein described with reference to the accompanying drawings.

Claims

CLAIMS:
1. A method for controlling data at a client device, including the steps of: receiving a request from said client device for network resource data; sending said request to a server having said resource data; receiving a response from the server including the resource data and additional data; and sending code for displaying information on the additional data and providing the ability to accept or refuse the additional data at said client device.
2. A method as claimed in claim 1, wherein said additional data is for storing a client identifier at said client device.
3. A method as claimed in claim 1, wherein said additional data is for setting a cookie at said client device.
4. A method as claimed in claim 1, wherein said code is executed by a browser of said client device.
5. A method as claimed in claim 1 , wherein said resource data is display data.
6. A method for controlling the setting of variables at a client device, including the steps of: receiving a request from said client device directed to a resource server; forwarding the request to said resource server; receiving a response from said resource server, including a resource and header instructions for setting variables; and sending code which provides the ability to accept or refuse the setting of variables at said client device in accordance with said header instructions.
7. A method as claimed in claim 6, wherein said variables are variables of a cookie.
8. A method as claimed in claim 6, wherein said resource server is a document server and said resource is a document.
9. A method as claimed in any one of the preceding claims wherein said server is part of the Internet.
10. A method as claimed in any one of claims 1 to 8, wherein said client device is a computer including a browser.
11. A method as claimed in any one of claim 1 to 8, wherein said client device is a PDA.
12. A method as claimed in any one of claims 1 to 8, wherein said client device is a mobile phone.
13. An access system having means to execute steps of a method as claimed in any one of the preceding claims.
14. An access system as claimed in claim 13, comprising components of an Internet service provider.
15. A proxy server configured to execute the steps of a method as claimed in any one of claims 1 to 12.
16. Computer program code stored on computer readable storage media for executing the steps of a method as claimed in any one of claims 1 to 12.
17. A network access system having: means for receiving a request from said client device for network resource data; means for sending said request to a server having said resource data; means for receiving a response from the server including the resource data and additional data; and means for sending code for displaying information on the additional data and providing the ability to accept or refuse the additional data at said client device.
PCT/AU2001/000963 2000-08-07 2001-08-07 A method for controlling data at a client device WO2002013026A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001277408A AU2001277408A1 (en) 2000-08-07 2001-08-07 A method for controlling data at a client device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPQ9241A AUPQ924100A0 (en) 2000-08-07 2000-08-07 A method for controlling data at a client device
AUPQ9241 2000-08-07

Publications (1)

Publication Number Publication Date
WO2002013026A1 true WO2002013026A1 (en) 2002-02-14

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AU (1) AUPQ924100A0 (en)
WO (1) WO2002013026A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1522025A1 (en) * 2002-07-15 2005-04-13 America Online Incorporated Handheld client framework system
WO2007011579A2 (en) 2005-07-15 2007-01-25 Microsoft Corporation Immunizing html browsers and extensions from known vulnerabilities
CN100508518C (en) * 2002-09-03 2009-07-01 国际商业机器公司 Network system, back agency, computer equipment, data processing method and program products
US7925694B2 (en) * 2007-10-19 2011-04-12 Citrix Systems, Inc. Systems and methods for managing cookies via HTTP content layer
US8239939B2 (en) 2005-07-15 2012-08-07 Microsoft Corporation Browser protection module
US9059966B2 (en) 2008-01-26 2015-06-16 Citrix Systems, Inc. Systems and methods for proxying cookies for SSL VPN clientless sessions
US10019570B2 (en) 2007-06-14 2018-07-10 Microsoft Technology Licensing, Llc Protection and communication abstractions for web browsers

Citations (3)

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WO1999023568A1 (en) * 1997-10-30 1999-05-14 Juno Online Services, Inc. Method and apparatus to determine user identity and limit access to a communications network
EP1020804A2 (en) * 1999-01-13 2000-07-19 Pitney Bowes Inc. A system for managing user-characterizing network protocol headers
US6182142B1 (en) * 1998-07-10 2001-01-30 Encommerce, Inc. Distributed access management of information resources

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
WO1999023568A1 (en) * 1997-10-30 1999-05-14 Juno Online Services, Inc. Method and apparatus to determine user identity and limit access to a communications network
US6182142B1 (en) * 1998-07-10 2001-01-30 Encommerce, Inc. Distributed access management of information resources
EP1020804A2 (en) * 1999-01-13 2000-07-19 Pitney Bowes Inc. A system for managing user-characterizing network protocol headers

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1522025A1 (en) * 2002-07-15 2005-04-13 America Online Incorporated Handheld client framework system
EP1522025A4 (en) * 2002-07-15 2005-11-16 America Online Inc Handheld client framework system
US8200745B2 (en) 2002-07-15 2012-06-12 Aol Inc. Handheld client framework system
CN100508518C (en) * 2002-09-03 2009-07-01 国际商业机器公司 Network system, back agency, computer equipment, data processing method and program products
WO2007011579A2 (en) 2005-07-15 2007-01-25 Microsoft Corporation Immunizing html browsers and extensions from known vulnerabilities
EP1904988A2 (en) * 2005-07-15 2008-04-02 Microsoft Corporation Immunizing html browsers and extensions from known vulnerabilities
EP1904988A4 (en) * 2005-07-15 2011-03-23 Microsoft Corp Immunizing html browsers and extensions from known vulnerabilities
US8225392B2 (en) 2005-07-15 2012-07-17 Microsoft Corporation Immunizing HTML browsers and extensions from known vulnerabilities
US8239939B2 (en) 2005-07-15 2012-08-07 Microsoft Corporation Browser protection module
US10019570B2 (en) 2007-06-14 2018-07-10 Microsoft Technology Licensing, Llc Protection and communication abstractions for web browsers
US7925694B2 (en) * 2007-10-19 2011-04-12 Citrix Systems, Inc. Systems and methods for managing cookies via HTTP content layer
US9059966B2 (en) 2008-01-26 2015-06-16 Citrix Systems, Inc. Systems and methods for proxying cookies for SSL VPN clientless sessions

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