Secure Cross-Domain Scripting via Callback Resource Identifier
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Solution Overview
Problem
Modern web browsers' same origin policy restricts cross-domain communication, making it difficult for web service developers to provide integrated services or applications across different domains while maintaining security, as it limits script access and data sharing between web pages from different domains.
Innovation Solution
A system that generates a developer key to bind a callback resource identifier, allowing secure data transmission and resource sharing between domains by creating nested inline frames within a web page, using the callback URL to facilitate communication between different domains while ensuring security through revocation status and authentication tokens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If modern browsers enforce same origin policy to prevent security risks, then security is improved, but cross-domain service integration and data sharing are restricted
Solution Approach 1:
The patent introduces a callback resource identifier as an intermediary mechanism that enables secure cross-domain communication. The callback URL acts as a mediator between the first domain (web page) and second domain (service provider), allowing data exchange while maintaining browser security policies. The system generates a unique callback resource identifier for each developer, which serves as a secure channel for receiving data from external domains without violating same origin restrictions.
Solution Approach 2:
The patent segments the cross-domain communication process into distinct components: an initiation request from the first domain, a callback resource identifier generation by the server, and a second inline frame creation in the second domain. This segmentation allows each component to operate within its own domain context while maintaining secure communication through the callback mechanism, thus enabling service integration without compromising security.
2Adaptability or versatility
If scripts are embedded to access cross-domain APIs and functions, then service integration capability is improved, but security risks from malicious script injection increase
Solution Approach 1:
The patent implements a feedback mechanism where the server generates a unique callback resource identifier in response to an initiation request, and this identifier is then used to create a controlled communication channel. The callback URL provides feedback from the second domain back to the first domain in a secure manner, allowing service integration while preventing unauthorized script injection since only authenticated callback channels can communicate.
3Ease of operation
If cross-domain script execution is allowed to provide integrated services, then ease of operation is improved, but security control and access protection deteriorate
Solution Approach 1:
The patent performs preliminary actions by generating the callback resource identifier before actual cross-domain data exchange occurs. The server authenticates the developer and creates a secure callback channel in advance, which simplifies subsequent cross-domain operations. This preliminary setup reduces the complexity of security control during runtime, as the communication channel is already authenticated and secured before use.
Data Source
AI summary
An approach is provided for providing secure cross-site scripting. A web services platform causes, at least in part, reception of an initiation request from at least a first inline frame of at least one web page. The initiation request specifies a developer identifier associated with a domain of the at least one web page. The web services platform determines a callback resource identifier based on the developer identifier. The web services platform then determines to cause, at least in part, transmission of the callback resource identifier to the at least the first inline frame for use in creation of at least a second inline frame associated with the at least the first inline frame.